DIN-Rail Mount Equipment Circuit Breakers
Also known as supplemental protectors, these circuit breakers mount directly to DIN rail downstream from a branch circuit breaker to protect a single piece of equipment. They are rated UL1077 for protection against overloads and short circuits. Because they are thermal-magnetic, these breakers trip two ways. They either trip when heat is generated slowly by consistent low-level overload current, or they trip quickly when the magnetic coil senses a high-current short circuit.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
B-trip circuit breakers are best for protecting sensitive equipment, such as programmable logic controllers (PLCs) and sensors, which could be damaged by a spike in current. These circuit breakers will trip if a rush of current reaches 3 to 5 times their rated current.
C-trip circuit breakers are the most common. They’re best for applications such as lighting and control panels, where equipment startup causes a moderate spike in current. They won’t trip until a rush of current reaches 5 to 10 times their rated current.
D-trip circuit breakers prevent nuisance tripping, so they are best for equipment that has a high spike in current at startup, such as transformers, power supplies, and heaters. They will not trip unless a rush of current reaches 10 to 20 times their rated current.
Shunt trips receive a signal from equipment to trip your circuit breaker in situations other than overload or short circuit conditions. For example, use them with a smoke detector to shut off power to a system in the event of a fire.
Auxiliary contacts send a signal to other equipment when the circuit trips. They can activate a warning light, initiate a shutdown, or start a backup power source.
Distribution bars simplify wiring by powering multiple adjacent circuit breakers without needing separate wires for each one. This cuts down on assembly time and space. Cut them to the number of terminals that you need.
Extension terminals raise the wire connection point above distribution bars for easy access to connect power to a set of circuit breakers.
Distribution bar end covers seal the live ends of distribution bars to prevent injury and damage.
Distribution bar terminal covers shield unused, live terminals on distribution bars to prevent injury and damage.
For technical drawings and 3-D models, click on a part number.
| Current, A | Voltage | Frequency, Hz | Breakthrough Current | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
B Trip Type | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
3 Pole—Toggle Style | ||||||||||||
| 1 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 0000000 |
| 1, 5, 10, 15, 20, 30 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 5 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 10 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 15 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 20 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 30 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
C Trip Type | ||||||||||||
3 Pole—Toggle Style | ||||||||||||
| 1 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 2 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 3 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 4 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 5 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 6 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 8 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 10 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 15 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 20 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 25 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 30 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 40 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 50 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
D Trip Type | ||||||||||||
3 Pole—Toggle Style | ||||||||||||
| 1 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 2 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 3 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 4 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 5 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 6 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 8 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 10 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 15 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 20 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 25 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 30 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 40 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 50 | 277V AC/480YV AC | 50/60 | 5,000 A @ 277 V AC 5,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 3.15" | 2.09" | 2.36" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| Voltage | Current, A | Frequency, Hz | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 12-110V AC/12-60V DC | 63 | 50/60 | 35 | Screw-Clamp Terminals | 4.13" | 0.7" | 2.36" | 25° to 100° | UL 489, UL Listed, CSA Certified, CE Marked, IEC 60898 | 00000000 | 000000 |
| 110-415V AC/110-230V DC | 40 | 50/60 | 35 | Screw-Clamp Terminals | 4.13" | 0.7" | 2.36" | 25° to 100° | UL 489, UL Listed, CSA Certified, CE Marked, IEC 60898 | 00000000 | 00000 |
Voltage | Current, A | Frequency, Hz | Industry Designation | No. of Circuits Controlled | Switch Starting Position | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 230V AC | 6 | 50/60 | DPST | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | 35 | Screw-Clamp Terminals | 3.15" | 0.35" | 2.36" | -40° to 165° F | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
Terminal | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For No. of Poles | No. of Terminals | Voltage | Current, A | Ctr.-to-Ctr. | Wd. | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 3 | 57 | 277V AC/480YV AC | 80 | 0.7" | 0.24" | 1.46" | 39.72" | 0.87" | 25° to 212° | UL 1077, UL Listed, CE Marked, IEC 60947-2 | 00000000 | 0000000 |
| For No. of Poles | Voltage | Current, A | Frequency, Hz | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 2, 3 | 277V AC/480YV AC | 4 | 50/60 | Screw-Clamp Terminals | 1.14" | 2.36" | 0.67" | -40° to 165° | UL 1077, UL Listed, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| For No. of Poles | Ht. | Wd. | Dp. | Material | Temp. Range, °F | Specifications Met | Pkg. Qty. | Pkg. | |
| 2, 3 | 0.94" | 0.85" | 0.38" | Plastic | -40° to 165° | UL 1077, CSA Certified, CE Marked, IEC 60947-2 | 10 | 00000000 | 000000 |
| For No. of Terminals | Ht. | Wd. | Dp. | Material | Temp. Range, °F | Specifications Met | Each | |
| 5 | 0.94" | 3.35" | 0.47" | Plastic | -40° to 165° | UL 1077, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 00000 |
DIN-Rail Mount Branch Circuit Breakers
Mount these circuit breakers directly to DIN rail to protect equipment and wiring in an area of your facility from overloads and short circuits. They meet UL 489 requirements for branch circuit protection and are certified as current limiting, so they protect equipment by minimizing passing current during a short circuit. Because they are thermal-magnetic, these breakers trip two ways. They either trip when heat is generated slowly by consistent low-level overload current, or they trip quickly when the magnetic coil senses a high-current short circuit.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
B-trip circuit breakers are best for protecting sensitive equipment, such as programmable logic controllers (PLCs) and sensors, which could be damaged by a spike in current. These circuit breakers will trip if a rush of current reaches 3 to 5 times their rated current.
C-trip circuit breakers are the most common. They’re best for applications such as lighting and control panels, where equipment startup causes a moderate spike in current. They won’t trip until a rush of current reaches 5 to 10 times their rated current.
D-trip circuit breakers prevent nuisance tripping, so they are best for equipment that has a high spike in current at startup, such as transformers, power supplies, and heaters. They will not trip unless a rush of current reaches 10 to 20 times their rated current.
Shunt trips receive a signal from equipment to trip your circuit breaker in situations other than overload or short circuit conditions. For example, use them with a smoke detector to shut off power to a system in the event of a fire.
Auxiliary contacts send a signal to other equipment when the circuit trips. They can activate a warning light, initiate a shutdown, or start a backup power source.
Distribution bars simplify wiring by powering multiple adjacent circuit breakers without needing separate wires for each one. This cuts down on assembly time and space.
Extension terminals raise the wire connection point above distribution bars for easy access to connect power to a set of circuit breakers.
Distribution bar terminal covers shield unused, live terminals on distribution bars to prevent injury and damage.
For technical drawings and 3-D models, click on a part number.
| Choose a Current, A | Voltage | Frequency, Hz | Breakthrough Current | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
B Trip Type | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
3 Pole—Toggle Style | ||||||||||||
| 277V AC/480YV AC | 50/60 | __ | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 0000000 | |
C Trip Type | ||||||||||||
3 Pole—Toggle Style | ||||||||||||
| 240V AC | 50/60 | 10,000 A @ 240 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 | |
| 240V AC | 50/60 | 10,000 A @ 240 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 | |
| 1/2 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 1 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 1 1/2 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 2 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 3 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 4 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 5 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 6 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 7 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 8 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 10 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 13 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 15 | 277V AC/480YV AC | 50/60 | 14,000 A @ 277 V AC 14,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 16 | 277V AC/480YV AC | 50/60 | 14,000 A @ 277 V AC 14,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 20 | 277V AC/480YV AC | 50/60 | 14,000 A @ 277 V AC 14,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 25 | 277V AC/480YV AC | 50/60 | 14,000 A @ 277 V AC 14,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 30 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 32 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
D Trip Type | ||||||||||||
3 Pole—Toggle Style | ||||||||||||
| 1 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 0000000 | 000000 |
| 2 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 3 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 4 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 5 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 6 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 8 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 10 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 15 | 277V AC/480YV AC | 50/60 | 14,000 A @ 277 V AC 14,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 20 | 277V AC/480YV AC | 50/60 | 14,000 A @ 277 V AC 14,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 25 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 30 | 277V AC/480YV AC | 50/60 | 10,000 A @ 277 V AC 10,000 A @ 480 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| 40 | 240V AC | 50/60 | 10,000 A @ 240 V AC | 35 | Screw-Clamp Terminals | 4.13" | 2.09" | 2.36" | -10° to 165° | UL 489, CSA Certified, CE Marked, IEC 60947-2 | 00000000 | 000000 |
| Voltage | Current, A | Frequency, Hz | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 12-110V AC/12-60V DC | 63 | 50/60 | 35 | Screw-Clamp Terminals | 4.13" | 0.7" | 2.36" | 25° to 100° | UL 489, UL Listed, CSA Certified, CE Marked, IEC 60898 | 00000000 | 000000 |
| 110-415V AC/110-230V DC | 40 | 50/60 | 35 | Screw-Clamp Terminals | 4.13" | 0.7" | 2.36" | 25° to 100° | UL 489, UL Listed, CSA Certified, CE Marked, IEC 60898 | 00000000 | 00000 |
| Voltage | Current, A | Frequency, Hz | Industry Designation | No. of Circuits Controlled | Switch Starting Position | For DIN Rail Size, mm | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 250V AC | 6 | 50/60 | DPST | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | 35 | Screw-Clamp Terminals | 3.78" | 0.35" | 2.36" | -10° to 165° F | UL 489, UL Listed, CSA Certified, CE Marked, IEC 60898 | 00000000 | 000000 |
Terminal | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For No. of Poles | No. of Terminals | Voltage | Current, A | Frequency, Hz | Ctr.-to-Ctr. | Wd. | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 3 | 12 | 277V AC/480YV AC/96V DC | 80 | 50/60 | 0.7" | 0.2" | 1.28" | 8.06" | 0.61" | -10° to 165° | UL 489, UL Recognized Component, CE Marked, IEC 60898 | 00000000 | 000000 |
| For No. of Poles | Voltage | Current, A | Frequency, Hz | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 1, 2, 3 | 480V AC/96V DC | 80 | 50/60 | Screw-Clamp Terminals | 2.82" | 0.64" | 1.23" | -10° to 165° | UL 489, UL Recognized Component, CE Marked, IEC 60898 | 0000000 | 000000 |
| For No. of Terminals | Ht. | Wd. | Dp. | Material | Temp. Range, °F | Specifications Met | Each | |
| 3 | 0.94" | 1.9" | 0.63" | Plastic | -10° to 165° | UL 489, UL Recognized Component, CE Marked, IEC 60898 | 00000000 | 00000 |
Square D Load-Center Circuit Breakers
Match these circuit breakers to Square D breaker boxes or panel boards of the same manufacturer series. They meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from overloads and short circuits. Because they are thermal-magnetic, these breakers trip two different ways. They either trip when heat is generated by sustained low-level overload current or quickly when the magnetic coil senses a high-current short circuit.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
For technical drawings and 3-D models, click on a part number.
| Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Location | Wire Connection Type | Wd. | Specifications Met | Each | |
QO Series | |||||||||
|---|---|---|---|---|---|---|---|---|---|
3 Pole—Toggle Style | |||||||||
| 15 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Breaker Box | Snap On | 2 1/4" | UL 489, UL Listed | 00000000 | 0000000 |
| 20 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Breaker Box | Snap On | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 30 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Breaker Box | Snap On | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 40 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Breaker Box | Snap On | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
QOB Series | |||||||||
3 Pole—Toggle Style | |||||||||
| 15 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Panel Board | Screw-Clamp Terminals | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 20 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Panel Board | Screw-Clamp Terminals | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 30 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Panel Board | Screw-Clamp Terminals | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 40 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Panel Board | Screw-Clamp Terminals | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 50 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Panel Board | Screw-Clamp Terminals | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
| 60 | 120V AC/240V AC/48V DC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC 5,000 A @ 48 V DC | Panel Board | Screw-Clamp Terminals | 2 1/4" | UL 489, UL Listed | 00000000 | 000000 |
High-Power Circuit Breakers
Protect an area of a facility that has high-powered equipment. These circuit breakers are also known as molded case circuit breakers. They meet UL 489 requirements for branch circuit protection. Because these breakers are thermal-magnetic, they trip two ways. They either trip when heat is generated slowly by consistent low-level overload current, or they trip quickly when the magnetic coil senses a high-current short circuit. A switch lets you adjust when these breakers magnetically trip, so you don't need to replace them as your application changes. These breakers have internal accessory slots to fit shunt trips, auxiliary contacts, and undervoltage trips, saving space in your setup.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Shunt trips receive a signal from equipment to trip your circuit breaker in situations other than overload or short circuit conditions. For example, use them with a smoke detector to shut off power to a system in the event of a fire. 30A to 250A breakers can only have one shunt trip or undervoltage trip installed. 400A to 600A breakers can accommodate one shunt trip and one undervoltage trip at the same time.
Auxiliary contacts send a signal to other equipment when the circuit trips. They can activate a warning light, initiate a shutdown, or start a backup power source. Multiple auxiliary contacts can be used within one circuit breaker and can be placed in any of the accessory slots.
Undervoltage trips protect equipment from operating with less than their intended voltage by tripping a circuit breaker when the supply voltage drops below a set level. 30A to 250A breakers can only have one shunt trip or undervoltage trip installed. 400A to 600A breakers can accommodate one shunt trip and one undervoltage trip at the same time.
Install handles on the front cover of an electrical cabinet to turn these breakers on, off, or reset them without having to open the cabinet. Yet, these handles won’t prevent you from opening the electrical cabinet normally. You can also lock the handles in the on or off position with a padlock (not included) to prevent unauthorized changes to the circuit breaker.
For technical drawings and 3-D models, click on a part number.
| Current, A | Voltage | Frequency, Hz | Breakthrough Current | Inrush Current Setting, A | Mounting Location | For DIN Rail Size, mm | Mount Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
3 Pole—Toggle Style | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 30 | 480V AC/600YV AC/600V DC | 50/60 | 65,000 A @ 240 V AC 25,000 A @ 480 V AC 14,000 A @ 600 V AC 14,000 A @ 125 V DC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 150, 180, 210, 240, 270, 300 | DIN Rail | 35 | Screw On | 5.5" | 3" | 3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 0000000 |
| 60 | 480V AC/600YV AC/600V DC | 50/60 | 65,000 A @ 240 V AC 25,000 A @ 480 V AC 14,000 A @ 600 V AC 14,000 A @ 125 V DC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 300, 360, 420, 480, 540, 600 | DIN Rail | 35 | Screw On | 5.5" | 3" | 3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 000000 |
| 100 | 480V AC/600YV AC/600V DC | 50/60 | 65,000 A @ 240 V AC 25,000 A @ 480 V AC 14,000 A @ 600 V AC 14,000 A @ 125 V DC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 500, 600, 700, 800, 900, 1,000 | DIN Rail | 35 | Screw On | 5.5" | 3" | 3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 000000 |
| 125 | 480V AC/600YV AC/600V DC | 50/60 | 65,000 A @ 240 V AC 25,000 A @ 480 V AC 14,000 A @ 600 V AC 14,000 A @ 125 V DC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 625, 750, 875, 1,000, 1,125, 1,250 | DIN Rail | 35 | Screw On | 5.5" | 3" | 3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| 150 | 600YV AC/600V AC/600V DC | 50/60 | 85,000 A @ 240 V AC 35,000 A @ 480 V AC 18,000 A @ 600 V AC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 750, 900, 1,050, 1,200, 1,350, 1,500 | __ | __ | Screw On | 7.3" | 4.1" | 3.3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| 200 | 600YV AC/600V AC/600V DC | 50/60 | 85,000 A @ 240 V AC 35,000 A @ 480 V AC 18,000 A @ 600 V AC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 1,000, 1,200, 1,400, 1,600, 1,800, 2,000 | __ | __ | Screw On | 7.3" | 4.1" | 3.3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| 225 | 600YV AC/600V AC/600V DC | 50/60 | 85,000 A @ 240 V AC 35,000 A @ 480 V AC 18,000 A @ 600 V AC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 1,125, 1,350, 1,575, 1,800, 2,025, 2,250 | __ | __ | Screw On | 7.3" | 4.1" | 3.3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| 250 | 600YV AC/600V AC/600V DC | 50/60 | 85,000 A @ 240 V AC 35,000 A @ 480 V AC 18,000 A @ 600 V AC 50,000 A @ 250 V DC 50,000 A @ 500 V DC 50,000 A @ 600 V DC | 1,250, 1,500, 1,750, 2,000, 2,250, 2,500 | __ | __ | Screw On | 7.3" | 4.1" | 3.3" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| 400 | 600V AC/600YV AC/750V DC | 50/60 | 85,000 A @ 240 V AC 35,000 A @ 480 V AC 18,000 A @ 600 V AC 50,000 A @ 600 V DC 10,000 A @ 750 V DC | 2,000, 2,400, 2,800, 3,200, 3,600, 4,000 | __ | __ | Screw On | 9.8" | 5.4" | 5.4" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| 600 | 600YV AC/600V AC/750V DC | 50/60 | 85,000 A @ 240 V AC 35,000 A @ 480 V AC 18,000 A @ 600 V AC 50,000 A @ 600 V DC 10,000 A @ 750 V DC | 3,000, 3,600, 4,200, 4,800, 5,400, 6,000 | __ | __ | Screw On | 9.8" | 5.4" | 5.4" | -10° to 155° | UL 489, UL Listed, CE Marked, IEC 60947-2, IEC 81346-2 | 0000000 | 00000000 |
| Voltage | Current | Frequency, Hz | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 110-127V AC | 7.4 A @ 110 V AC | 50/60 | Screw-Clamp Terminals | 2.56" | 0.85" | 1.23" | -10° to 155° | UL 489, UL Listed, IEC 60947-2 | 0000000 | 0000000 |
| Voltage | Current, A | Frequency, Hz | Industry Designation | No. of Circuits Controlled | Switch Starting Position | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 24-300V AC/24-250V DC | 6 | 50/60 | DPST | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Screw-Clamp Terminals | 2.57" | 0.28" | 1.36" | -10° to 155° | UL 489, UL Listed, IEC 60947-2 | 0000000 | 0000000 |
| Voltage | Current | Frequency, Hz | Wire Connection Type | Ht. | Wd. | Dp. | Temp. Range, °F | Specifications Met | Each | |
| 120-127V AC | 0.01 A @ 120 V AC | 50/60 | Screw-Clamp Terminals | 2.56" | 1.01" | 1.13" | -10° to 155° | UL 489, UL Listed, IEC 60947-2 | 0000000 | 0000000 |
| For Circuit Breaker Current, A | Ht. | Wd. | Projection | Mounting Fasteners Included | For Max. Padlock Shackle Dia. | Padlock Included | Temp. Range, °F | Environmental Rating | Specifications Met | Each | |
| 30, 60, 100, 125 | 2.95" | 2.95" | 2.16" | Yes | 3/8" | No | -10° to 155° | IP65, NEMA 4X, NEMA 12 | IEC 60947-2 | 0000000 | 0000000 |
| 150, 200, 225, 250 | 2.95" | 2.95" | 2.16" | Yes | 3/8" | No | -10° to 155° | IP65, NEMA 4X, NEMA 12 | IEC 60947-2 | 0000000 | 000000 |
| 400, 600 | 2.95" | 2.95" | 2.16" | Yes | 3/8" | No | -10° to 155° | IP65, NEMA 4X, NEMA 12 | IEC 60947-2 | 0000000 | 000000 |