Circuit Board Relays
Smaller than relays with electrical wiring, these relays fit in compact devices. Mount them through holes on circuit boards with their solder pin terminals. Use them to control heaters, fans, and other high-power components from a low-power circuit.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Mechanical Life Cycles | Ht. | Wd. | Dp. | Pin Lg. | Each | |
Mechanical | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | |||||||||||
| 6 | 12V DC | 141 | 50 A @ 400 V AC | 400V AC | 1,000,000 | 2" | 1.3" | 2.3" | 0.18" | 0000000 | 000000 |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | |||||||||||
| 8 | 12V DC | 224 | 50 A @ 400 V AC | 400V AC | 1,000,000 | 2" | 1.3" | 2.3" | 0.18" | 0000000 | 00000 |
| 8 | 24V DC | 71 | 50 A @ 400 V AC | 400V AC | 1,000,000 | 2" | 1.3" | 2.3" | 0.18" | 0000000 | 00000 |
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 | 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 | 40A | 50A | 3 hp @ 115 V AC 7 1/2 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 | 00000 |
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 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 | 24V AC | 10VA | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 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 | 120V AC | 10VA | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 hp @ 575 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 | 24V DC | 3.1W | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
| 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 |
| 4 | 208V AC, 240V AC | 10VA | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 hp @ 575 V AC | 3.8" | 2.4" | 3.4" | 0.25" | 00000000 | 000000 |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 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 | 24V AC | 10VA | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 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 | 120V AC | 10VA | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 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 | 24V DC | 3.1W | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 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 |
| 6 | 208V AC, 240V AC | 10VA | 50A | 65A | 3 hp @ 115 V AC 10 hp @ 230 V AC | 15 hp @ 230 V AC 30 hp @ 460 V AC 30 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 | 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 | 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 | 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 | 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 |
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. They mount directly to 35 mm DIN rail (also known as DIN 3 rail) for fast installation. These relays have recessed terminals that prevent fingers and other objects from touching live circuits.
Auxiliary contacts (sold separately) allow you to add a signaling device or control another relay.
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 | 6.5VA | 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 | 24V AC | 6.5VA | 50A | 55A | 600V AC | 3 hp @ 120 V AC 10 hp @ 240 V AC | 15 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC | 3.5" | 1.8" | 3.5" | 00000000 | 000000 |
| 10 | 120V AC | 6.5VA | 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 | 120V AC | 6.5VA | 50A | 55A | 600V AC | 3 hp @ 120 V AC 10 hp @ 240 V AC | 15 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 | 6.5VA | 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 | 6.5VA | 50A | 55A | 600V AC | 3 hp @ 120 V AC 10 hp @ 240 V AC | 15 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 |
| 10 | 24V DC | 5.4W | 50A | 55A | 600V AC | 3 hp @ 120 V AC 10 hp @ 240 V AC | 15 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 | 6.5VA | 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 | 6.5VA | 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 | 6.5VA | 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 |
High-Starting-Current Vehicle Relays
Relay Socket and
Surface Mounting
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 | |||||||||||||||
| 4 | 12V DC | 50 A @ 12 V DC | 18V DC | 150 | 138 | 1.2" | 1" | 1" | 0.25" and 0.375" | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 000000 |
Stud-Terminal Relays
These relays are suitable for DC-powered equipment such as forklifts, floor scrubbers, and trucks. They are rated for continuous operation for cycles that run longer than 30 seconds.
4- and 6-terminal relays allow different input and switching voltages.
For technical drawings and 3-D models, click on a part number.