DIN-Rail Mount Solid State Relays
Unlike mechanical relays, these solid state relays have no moving parts, so they require less maintenance and last longer, switch faster, and are quieter. They mount on 35 mm DIN rail (also known as DIN 3) for fast installation. An LED indicator lights up when these relays are connected, so you can quickly confirm that they’re wired correctly. IP20 rated, their terminals are recessed, so they prevent fingers and other objects from touching live circuits.
Relays with an integrated heat sink disperse heat to increase the relay’s current rating.
Relays with an integrated fan are best for applications that generate more heat. The fan automatically turns on to provide additional cooling. When the temperature exceeds 176° F, an alarm sends a signal to an external device, such as a controller or indicating light.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage (Load Type) | Max. Switching Voltage | hp @ Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Single Phase | |||||||||||
| 4 | 24V AC, 120V AC, 208V AC, 240V AC, 277V AC/24V DC, 48V DC, 60V DC, 120V DC | 22 | 40 A @ 600 V AC (Full Load) | 660V AC | 1 hp @ 115 V AC 3 hp @ 230 V AC | 4.33" | 1.4" | 4.917" | Integrated Heat Sink, LED Indicator | 0000000 | 0000000 |
| 4 | 4V DC, 6V DC, 12V DC, 24V DC, 30V DC | 13 | 40 A @ 600 V AC (Full Load) | 660V AC | 1 hp @ 115 V AC 3 hp @ 230 V AC | 4.33" | 1.4" | 4.917" | Integrated Heat Sink, LED Indicator | 0000000 | 000000 |
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | |||||||||||
Two Phase | |||||||||||
| 6 | 24V AC, 120V AC, 208V AC, 240V AC, 277V AC/24V DC, 48V DC, 60V DC, 120V DC | 2 | 40 A @ 600 V AC (Full Load) | 660V AC | 5 hp @ 230 V AC 10 hp @ 480 V AC | 4.33" | 2.84" | 4.66" | Integrated Heat Sink, LED Indicator | 0000000 | 000000 |
| 6 | 5V DC, 6V DC, 12V DC, 24V DC, 30V DC | 10 | 40 A @ 600 V AC (Full Load) | 660V AC | 5 hp @ 230 V AC 10 hp @ 480 V AC | 4.33" | 2.84" | 4.66" | Integrated Heat Sink, LED Indicator | 0000000 | 000000 |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | |||||||||||
Three Phase | |||||||||||
| 10 | 24V AC, 120V AC, 208V AC, 240V AC, 277V AC/24V DC, 48V DC, 60V DC, 120V DC | 2 | 40 A @ 600 V AC (Full Load) | 660V AC | 5 hp @ 230 V AC 10 hp @ 480 V AC | 5.31" | 2.13" | 3.739" | Integrated Heat Sink, Integrated Fan, LED Indicator | 0000000 | 000000 |
| 10 | 5V DC, 6V DC, 12V DC, 24V DC, 30V DC | 10 | 40 A @ 600 V AC (Full Load) | 660V AC | 5 hp @ 230 V AC 10 hp @ 480 V AC | 5.31" | 2.13" | 3.739" | Integrated Heat Sink, Integrated Fan, LED Indicator | 0000000 | 000000 |
Infrequent-Cycle Relays
For use with equipment that cycles on and off, these relays meet UL 508 for air conditioning and heating. Connections are accessible from the front, so you can mount relays side-by-side. Also known as definite-purpose contactors.
Enclosures (sold separately) are NEMA 1 rated to protect contacts from corrosion.
Also Available: Auxiliary contacts for 3.8"-7.2" Ht. relays. They allow you to add a signaling device or control another relay. Please select 6564K99, then select the McMaster-Carr part number of your relay and whether you want to switch one circuit on (1 Normally Open) or off (1 Normally Closed).
For technical drawings and 3-D models, click on a part number.
Switching Current @ 600V AC | hp @ Switching Voltage | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Power | Full Load  | Resistive Load | Single Phase | Three Phase | Ht. | Wd. | Dp. | Quick-Disconnect Tab Wd. | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 2 | 24V AC | 6VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
| 2 | 24V AC | 6VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
| 2 | 120V AC | 6VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 00000 |
| 2 | 120V AC | 6VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
| 2 | 208V AC, 240V AC | 6VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 00000 |
| 2 | 208V AC, 240V AC | 6VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 4 | 24V AC | 6.5VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 00000 |
| 4 | 24V AC | 6.5VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
| 4 | 120V AC | 6.5VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 00000 |
| 4 | 120V AC | 6.5VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
| 4 | 24V DC | 3.1W | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 4 | 24V DC | 3.1W | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 4 | 208V AC, 240V AC | 6.5VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 00000 |
| 4 | 208V AC, 240V AC | 6.5VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | __ | 3.2" | 2" | 2.3" | 0.25" | 00000000 | 000000 |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 6 | 24V AC | 7VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 24V AC | 7VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 120V AC | 7VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 120V AC | 7VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 24V DC | 3.1W | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 24V DC | 3.1W | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 208V AC, 240V AC | 7VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 6 | 208V AC, 240V AC | 7VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
4 Circuits Controlled with 4 Off (Normally Open)—4PST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 8 | 24V AC | 50.4VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 24V AC | 50.4VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 120V AC | 50.4VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 120V AC | 50.4VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 24V DC | 5.1W | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 24V DC | 5.1W | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 208V AC, 240V AC | 50.4VA | 30A | 40A | 2 hp @ 115 V AC 5 hp @ 230 V AC | 10 hp @ 230 V AC 15 hp @ 460 V AC 15 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| 8 | 208V AC, 240V AC | 50.4VA | 40A | 50A | 3 hp @ 115 V AC 7 1/2 hp @ 230 V AC | 10 hp @ 230 V AC 20 hp @ 460 V AC 20 hp @ 575 V AC | 3.8" | 2.7" | 3.4" | 0.25" | 00000000 | 000000 |
| Enclosures for 60A 3PST-NO Relays and 4PST-NO Relays | 00000000 | Each | 0000000 |
High-Starting-Current Vehicle Relays
Crimp-On
Terminals
Also known as automotive relays, these relays can handle high starting (inrush) currents.
Relays for surface mounting have a tab for added security in high-vibration applications.
Relays | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching Current @ Voltage | Relay Sockets with Crimp-On Terminals | Relay Sockets with Wire Leads | |||||||||||||
| Number of Terminals | Input Voltage | Off (Normally Open) Circuit Position | Max. Switching Voltage | Max. Starting Current, A | Control Current, mA | Ht. | Wd. | Dp. | Quick-Disconnect Tab Wd. | Each | Each | Each | |||
For Relay Socket and Surface Mounting | |||||||||||||||
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||||||||
| 5 | 12V DC | 40 A @ 12 V DC | 20V DC | 150 | 141 | 1" | 1" | 0.9" | 0.25" | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 000000 |
Weatherproof High-Starting-Current Vehicle Relays
Crimp-On
Terminals
The extended housing covers and protects terminals. Also known as automotive relays, they can handle high starting (inrush) currents. They have a tab for added security in high-vibration applications.
Relays | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching Current @ Voltage | Relay Sockets with Crimp-On Terminals | Relay Sockets with Wire Leads | ||||||||||||||
| Number of Terminals | Input Voltage | Off (Normally Open) Circuit Position | On (Normally Closed) Circuit Position | Max. Switching Voltage | Max. Starting Current, A | Control Current, mA | Ht. | Wd. | Dp. | Quick-Disconnect Tab Wd. | Each | Each | Each | |||
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT | ||||||||||||||||
| 5 | 12V DC | 40 A @ 12 V DC | 20 A @ 12 V DC | 18V DC | 150 | 138 | 1.4" | 1.4" | 1.8" | 0.25" | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
Safety Relays
Receive signals from safety monitoring relays or controllers to switch devices off and on because of a system failure. When a failure is detected, the self-monitoring circuitry signals the controller to remove power and prevent restarting until the issue is resolved. An inspection window allows you to easily see the status of your system.
These relays have nondetachable auxiliary contacts, so they won’t separate from the relay if there is shock or vibration. Also known as force-guided or mechanically linked contacts, their interlocking opposing auxiliary contacts cannot be open or closed at the same time. They have mirror auxiliary contacts, which are normally closed and cannot be open at the same time as a normally open main contact. To keep your system from receiving false switching signals, the interlocking opposing auxiliary contact must remain open even if a contact welds closed.
IP20 rated, they have recessed terminals which prevent fingers and other objects from touching live circuits. These relays have been tested to multiple safety standards and can help achieve PL, SIL, and CAT system ratings. They also meet ISO and IEC standards for machine safety.
Mount them to 35mm DIN rail (also known as DIN 3 Rail). They can also be mounted to flat surfaces.
For technical drawings and 3-D models, click on a part number.
hp @ Switching Voltage | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Current, A | Switching Current @ 600V AC | Max. Switching Voltage | Single Phase | Three Phase | Auxiliary Contact Switch Starting Position (No. of Contacts) | Ht. | Wd. | Dp. | Max. System Safety Rating | Each | |
3 Circuits Controlled with 3 Off (Normally Open) or 3 On (Normally Closed)—3PST | |||||||||||||
| 18 | 120V AC | 18 | 40A | 600V AC | 2 hp @ 120 V AC 3 hp @ 240 V AC | 5 hp @ 240 V AC 10 hp @ 480 V AC 15 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 0000000 |
| 18 | 120V AC | 25 | 40A | 600V AC | 2 hp @ 120 V AC 5 hp @ 240 V AC | 10 hp @ 240 V AC 15 hp @ 480 V AC 20 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 18 | 40A | 600V AC | 2 hp @ 120 V AC 3 hp @ 240 V AC | 5 hp @ 240 V AC 10 hp @ 480 V AC 15 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
| 18 | 24V DC | 25 | 40A | 600V AC | 2 hp @ 120 V AC 5 hp @ 240 V AC | 10 hp @ 240 V AC 15 hp @ 480 V AC 20 hp @ 600 V AC | 1 Off (Normally Open) (2) 1 On (Normally Closed) (3) | 3.35" | 1.77" | 5.5" | PLe, SIL3, CAT 4, 600V | 0000000 | 000000 |
Touch-Safe DIN-Rail Mount Infrequent-Cycle Relays
Operate equipment that cycles on and off from your control cabinet. Often called definite-purpose contactors, these relays meet UL 508 for use with air conditioning and heating. Mount them directly to 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They have recessed terminals that prevent fingers and other objects from touching live circuits. You can wire the control circuit on either side of the relay, which helps you use less wire.
Auxiliary contacts (sold separately) allow you to add a signaling device or control another relay.
Use replacement coils to swap out a broken coil or change the input voltage of a relay. The full load current of the relay must match the full load current range of the coil.
For technical drawings and 3-D models, click on a part number.
Switching Current @ 600V AC | hp @ Switching Voltage | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Power | Full Load | Resistive Load | Max. Switching Voltage | Single Phase | Three Phase | Ht. | Wd. | Dp. | Each | |
Relays | ||||||||||||
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | ||||||||||||
| 10 | 24V AC | 9VA | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 1.8" | 3.5" | 00000000 | 0000000 |
| 10 | 120V AC | 9VA | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 1.8" | 3.5" | 00000000 | 000000 |
| 10 | 240V AC | 9VA | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 1.8" | 3.5" | 00000000 | 000000 |
| 10 | 24V DC | 5.4W | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 1.8" | 4.2" | 0000000 | 000000 |
4 Circuits Controlled with 4 Off (Normally Open)—4PST-NO | ||||||||||||
| 12 | 24V AC | 9VA | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 2.4" | 3.5" | 00000000 | 000000 |
| 12 | 120V AC | 9VA | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 2.4" | 3.5" | 00000000 | 000000 |
| 12 | 240V AC | 9VA | 40A | 50A | 600V AC | 3 hp @ 120 V AC 7 1/2 hp @ 240 V AC | 10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 2.4" | 3.5" | 00000000 | 000000 |
| Number of Circuits Controlled | For Relay Width | Switch Starting Position | Industry Designation | Mounting Location | Each | |
| 2 | 1.8", 2.2", 2.4" | 2 Off (Normally Open) | DPST-NO | Front | 0000000 | 000000 |
| 2 | 1.8", 2.2", 2.4" | 2 On (Normally Closed) | DPST-NC | Front | 0000000 | 00000 |
| 2 | 1.8", 2.4" | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Front | 00000000 | 00000 |
| 2 | 1.8", 2.4" | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Side | 00000000 | 00000 |
| 4 | 1.8", 2.2", 2.4" | 1 Off (Normally Open) and 3 On (Normally Closed) | 4PST-1NO/3NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.2", 2.4" | 2 Off (Normally Open) and 2 On (Normally Closed) | 4PST-2NO/2NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.2", 2.4" | 3 Off (Normally Open) and 1 On (Normally Closed) | 4PST-3NO/1NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.2", 2.4" | 4 Off (Normally Open) | 4PST-NO | Front | 0000000 | 00000 |
| 4 | 1.8", 2.2", 2.4" | 4 On (Normally Closed) | 4PST-NC | Front | 0000000 | 00000 |
