Square D Load-Center Circuit Breakers
Series, 1
Tandem Pole
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.
Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6mA. This minimizes the risk of electric shock to workers and equipment.
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 | |||||||||
---|---|---|---|---|---|---|---|---|---|
1 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 | 3/4" | 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 | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 0000000 | 00000 |
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 | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
2 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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
70 | 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 | 1 1/2" | UL 489, UL Listed | 0000000 | 000000 |
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 | 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 | 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 |
QO Series with 6mA Ground Fault Sensitivity | |||||||||
1 Pole—Toggle Style | |||||||||
20 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 000000 |
30 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 000000 |
2 Pole—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 000000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 000000 |
QOB Series | |||||||||
1 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 | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
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 | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
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 | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
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 | 3/4" | UL 489, UL Listed | 0000000 | 00000 |
2 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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 |
Homeline Series | |||||||||
1 Pole—Toggle Style | |||||||||
15 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
40 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
50 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 000000000 | 00000 |
1 Pole with Tandem Circuit—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
2 Pole—Toggle Style | |||||||||
15 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
40 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
50 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 00000 |
60 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 00000 |
Homeline Series with 6mA Ground Fault Sensitivity | |||||||||
1 Pole—Toggle Style | |||||||||
20 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 000000 |
2 Pole—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 000000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 000000 |
Square D Main Circuit Breaker Boxes
These boxes have a main circuit breaker switch and main service knockouts in the corners. They are single-phase, 3-wire, and can be mounted for top or bottom feed conduit connections. Use with Square D QO circuit breakers. Boxes are rated NEMA 1 for indoor use. Also known as load centers.
Circuit breakers meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from overloads and short circuits. Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6mA. This minimizes the risk of electric shock to workers and equipment.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Cover | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of Spaces | Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Style | Bus Bar Material | Attachment Style | Closure Method | Ht. | Wd. | Dp. | Specifications Met | Each | |
NEMA 1 Rated | ||||||||||||||
12 | 100 | 120V AC/240V AC | 50/60 | 22,000 A @ 120 V AC 22,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Copper | Lift Off | Screws | 14 7/8" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 0000000 |
20 | 100 | 120V AC/240V AC | 50/60 | 22,000 A @ 120 V AC 22,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Copper | Lift Off | Screws | 17 7/8" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 000000 |
30 | 200 | 120V AC/240V AC | 50/60 | 22,000 A @ 120 V AC 22,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Copper | Lift Off | Screws | 29 7/8" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 00000000 |
40 | 200 | 120V AC/240V AC | 50/60 | 22,000 A @ 120 V AC 22,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Copper | Lift Off | Screws | 33 3/4" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 00000000 |
Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Location | Wire Connection Type | Wd. | Specifications Met | Each | |
QO Series | |||||||||
---|---|---|---|---|---|---|---|---|---|
1 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 | 3/4" | 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 | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 0000000 | 00000 |
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 | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
2 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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
70 | 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 | 1 1/2" | UL 489, UL Listed | 0000000 | 000000 |
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 | 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 | 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 |
QO Series with 6mA Ground Fault Sensitivity | |||||||||
1 Pole—Toggle Style | |||||||||
20 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 000000 |
30 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 000000 |
2 Pole—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 000000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 000000 |
Square D Secondary Circuit Breaker Boxes
Connect these boxes to a main box—they do not have a main circuit breaker switch. They are single-phase, 3-wire, and can be mounted for top or bottom feed conduit connections. Also known as load centers.
NEMA 1 rated boxes are for indoor use.
NEMA 3R rated boxes are for outdoor use.
Circuit breakers meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from overloads and short circuits. Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6mA. This minimizes the risk of electric shock to workers and equipment.
Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.
Cover | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of Spaces | Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Style | Bus Bar Material | Attachment Style | Closure Method | Ht. | Wd. | Dp. | Specifications Met | Each | |
NEMA 1 Rated | ||||||||||||||
2 | 70 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Surface | Tin-Plated Copper | Lift Off | Screws | 9 1/4" | 4 7/8" | 3 1/4" | UL Listed | 0000000 | 000000 |
8 | 100 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Surface | Tin-Plated Copper | Lift Off | Screws | 12 5/8" | 8 7/8" | 3 3/4" | UL Listed | 0000000 | 000000 |
12 | 125 | 120V AC/240V AC | 50/60 | 65,000 A @ 120 V AC 65,000 A @ 240 V AC | Surface | Tin-Plated Copper | Lift Off | Screws | 17 7/8" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 000000 |
NEMA 3R Rated | ||||||||||||||
6 | 100 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Surface | Tin-Plated Copper | Hinged | Latch | 12 5/8" | 8 7/8" | 4 1/4" | UL Listed | 0000000 | 000000 |
12 | 125 | 120V AC/240V AC | 50/60 | 65,000 A @ 120 V AC 65,000 A @ 240 V AC | Surface | Tin-Plated Copper | Hinged | Latch | 18 7/8" | 14 3/4" | 4 1/2" | UL Listed | 0000000 | 000000 |
24 | 125 | 120V AC/240V AC | 50/60 | 65,000 A @ 120 V AC 65,000 A @ 240 V AC | Surface | Tin-Plated Copper | Hinged | Latch | 22" | 14 3/4" | 4 1/2" | UL Listed | 0000000 | 000000 |
Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Location | Wire Connection Type | Wd. | Specifications Met | Each | |
QO Series | |||||||||
---|---|---|---|---|---|---|---|---|---|
1 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 | 3/4" | 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 | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 0000000 | 00000 |
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 | 3/4" | UL 489, UL Listed | 00000000 | 00000 |
2 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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
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 | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 00000 |
70 | 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 | 1 1/2" | UL 489, UL Listed | 0000000 | 000000 |
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 | 000000 |
15, 20, 30, 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 | 000000 | 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 | 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 |
QO Series with 6mA Ground Fault Sensitivity | |||||||||
1 Pole—Toggle Style | |||||||||
20 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 000000 |
20, 30 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 0000000 | 000000 |
30 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 3/4" | UL 489, UL Listed | 00000000 | 000000 |
2 Pole—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 000000 |
20, 30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 0000000 | 000000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1 1/2" | UL 489, UL Listed | 00000000 | 000000 |
Square D Homeline Secondary Circuit Breaker Boxes
Connect these boxes to a main box—they do not have a main circuit breaker switch. They are single-phase, 3-wire, and can be mounted for top or bottom feed conduit connections. Boxes are rated NEMA 1 for indoor use. Also known as load centers.
Circuit breakers meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from overloads and short circuits. Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6mA. This minimizes the risk of electric shock to workers and equipment.
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.
Cover | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of Spaces | Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Style | Bus Bar Material | Attachment Style | Closure Method | Ht. | Wd. | Dp. | Specifications Met | Each | |
NEMA 1 Rated | ||||||||||||||
6 | 100 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Surface | Tin-Plated Aluminum | Lift Off | Screws | 12 5/8" | 8 7/8" | 3 7/8" | UL Listed | 0000000 | 000000 |
12 | 125 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Aluminum | Lift Off | Screws | 17 7/8" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 00000 |
20 | 125 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Aluminum | Lift Off | Screws | 26" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 00000 |
Series, 1
Tandem Pole
Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Location | Wire Connection Type | Wd. | Specifications Met | Each | |
Homeline Series | |||||||||
---|---|---|---|---|---|---|---|---|---|
1 Pole—Toggle Style | |||||||||
15 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 000000 |
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
40 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
50 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 000000000 | 00000 |
1 Pole with Tandem Circuit—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
2 Pole—Toggle Style | |||||||||
15 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
40 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
50 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 00000 |
60 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 00000 |
Homeline Series with 6mA Ground Fault Sensitivity | |||||||||
1 Pole—Toggle Style | |||||||||
20 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 000000 |
2 Pole—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 000000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 000000 |
Square D Homeline Main Circuit Breaker Boxes
With a main breaker installed and main service knockouts, these boxes are the entry point for electricity into your facility and the first step in protecting your electrical systems. They are single-phase, 3-wire, and can be mounted for top or bottom feed conduit connections. These boxes are rated NEMA 1 for indoor use. Also known as load centers.
Circuit breakers meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from overloads and short circuits. Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6mA. This minimizes the risk of electric shock to workers and equipment.
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.
Cover | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of Spaces | Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Style | Bus Bar Material | Attachment Style | Closure Method | Ht. | Wd. | Dp. | Specifications Met | Each | |
NEMA 1 Rated | ||||||||||||||
12 | 100 | 120V AC/240V AC | 50/60 | 22,000 A @ 120 V AC 22,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Aluminum | Lift Off | Screws | 17 7/8" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 0000000 |
24 | 125 | 120V AC/240V AC | 50/60 | 22,000 A @ 120 V AC 22,000 A @ 240 V AC | Recessed, Surface | Tin-Plated Aluminum | Lift Off | Screws | 26" | 14 1/4" | 3 3/4" | UL Listed | 0000000 | 000000 |
Series, 1
Tandem Pole
Current, A | Voltage | Frequency, Hz | Breakthrough Current | Mounting Location | Wire Connection Type | Wd. | Specifications Met | Each | |
Homeline Series | |||||||||
---|---|---|---|---|---|---|---|---|---|
1 Pole—Toggle Style | |||||||||
15 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 000000 |
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
40 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
50 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 000000000 | 00000 |
1 Pole with Tandem Circuit—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 00000 |
2 Pole—Toggle Style | |||||||||
15 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
40 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 00000000 | 00000 |
50 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 00000 |
60 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 00000 |
Homeline Series with 6mA Ground Fault Sensitivity | |||||||||
1 Pole—Toggle Style | |||||||||
20 | 120V AC | 50/60 | 10,000 A @ 120 V AC | Breaker Box | Snap On | 1" | UL 489, UL Listed | 00000000 | 000000 |
2 Pole—Toggle Style | |||||||||
20 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 000000 |
30 | 120V AC/240V AC | 50/60 | 10,000 A @ 120 V AC 10,000 A @ 240 V AC | Breaker Box | Snap On | 2" | UL 489, UL Listed | 000000000 | 000000 |