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Infrequent-Cycle Relays
2 Circuits
3 Circuits
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.
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 | |
2 Circuits Controlled with 2 Off (Normally Open)—DPST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 4 | 24V AC | 19VA | 90A | 120A | 7 1/2 hp @ 115 V AC 20 hp @ 230 V AC | 30 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 5" | 3.7" | 4.4" | 0.25" | 00000000 | 0000000 |
| 4 | 24V AC | 50.4VA | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 4 | 120V AC | 19VA | 90A | 120A | 7 1/2 hp @ 115 V AC 20 hp @ 230 V AC | 30 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 5" | 3.7" | 4.4" | 0.25" | 00000000 | 000000 |
| 4 | 120V AC | 50.4VA | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 4 | 24V DC | 5.1W | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 4 | 208V AC, 240V AC | 19VA | 90A | 120A | 7 1/2 hp @ 115 V AC 20 hp @ 230 V AC | 30 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 5" | 3.7" | 4.4" | 0.25" | 00000000 | 000000 |
| 4 | 208V AC, 240V AC | 50.4VA | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | ||||||||||||
With Quick-Disconnect and Screw Terminals | ||||||||||||
| 6 | 24V AC | 19VA | 90A | 120A | 7 1/2 hp @ 115 V AC 20 hp @ 230 V AC | 30 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 5" | 3.7" | 4.4" | 0.25" | 00000000 | 000000 |
| 6 | 24V AC | 50.4VA | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 6 | 120V AC | 19VA | 90A | 120A | 7 1/2 hp @ 115 V AC 20 hp @ 230 V AC | 30 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 5" | 3.7" | 4.4" | 0.25" | 00000000 | 000000 |
| 6 | 120V AC | 50.4VA | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 6 | 24V DC | 5.1W | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |
| 6 | 208V AC, 240V AC | 19VA | 90A | 120A | 7 1/2 hp @ 115 V AC 20 hp @ 230 V AC | 30 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 5" | 3.7" | 4.4" | 0.25" | 00000000 | 000000 |
| 6 | 208V AC, 240V AC | 50.4VA | 75A | 90A | 5 hp @ 115 V AC 15 hp @ 230 V AC | 20 hp @ 230 V AC 50 hp @ 460 V AC 50 hp @ 575 V AC | 3.8" | 2.6" | 4" | 0.25" | 00000000 | 000000 |