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. 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 | |
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 | 65 A @ 600 V AC (Full Load) | 660V AC | 10 hp @ 230 V AC 20 hp @ 480 V AC | 5.55" | 2.84" | 4.679" | Integrated Heat Sink, Integrated Fan, LED Indicator | 0000000 | 0000000 |
| 10 | 5V DC, 6V DC, 12V DC, 24V DC, 30V DC | 10 | 65 A @ 600 V AC (Full Load) | 660V AC | 10 hp @ 230 V AC 20 hp @ 480 V AC | 5.55" | 2.84" | 4.679" | 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.
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 | 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 | 0000000 |
| 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 | 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 | 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 | 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 | 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 | 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 | 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 |
Analog-Input Proportional-Control Relays
Often used to regulate the speed of AC fans or keep a heater at a set temperature, these relays connect directly to sensors to calculate and adjust output power. This allows you to use an analog input without converting it to a digital signal to control output power. They are solid state and have no moving parts, so they require less maintenance and last longer, are quieter, and switch faster than mechanical relays. IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits. An integrated heat sink disperses heat to increase the relay’s current rating. The LED indicator shows input voltage loss and internal relay faults, so you can easily check that your system is operating properly.
Mount them on 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They also mount to flat surfaces.
All relays have phase-angle switching to accurately control all types of loads. This mode signals at non-zero voltage, which can produce electrical noise. Choose relays with full-cycle switching for resistive loads. This mode signals at zero voltage, so electrical interference is lower than phase-angle switching.
Three-phase relays switch every cycle.
Relays with over-temperature protection stop power when it gets too hot and keeps it off until the issue is resolved. Connect an auxiliary contact (not included) to signal an alarm or status controller.
Relays with short-circuit protection stop power if there is an open circuit, short circuit, or output voltage loss until the issue is resolved. Connect an auxiliary contact (not included) to signal an alarm or status controller.
For technical drawings and 3-D models, click on a part number.
Input | Output | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Voltage | Current | No. of | Voltage | Current | No. of | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Protections Provided | Ht. | Wd. | Dp. | Features | Each | |
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | ||||||||||||||||
Three Phase with Phase Angle and Full Cycle Switching Mode | ||||||||||||||||
| 19 | 0-10V DC | 4-20mA | 1 | 180-660V AC | 65A | 3 | 50 | 65 A @ 600 V AC | 660V AC | Over Temperature | 4.3" | 2.84" | 5.56" | Integrated Heat Sink, LED Indicator, Recessed Terminals, Integrated Fan | 0000000 | 0000000 |
| 19 | 0-10V DC | 4-20mA | 1 | 180-660V AC | 65A | 3 | 50 | 65 A @ 600 V AC | 660V AC | Short Circuit | 4.3" | 2.84" | 5.56" | Integrated Heat Sink, LED Indicator, Recessed Terminals, Integrated Fan, Open Circuit, Configurable Alarm Outputs, Output Voltage Loss | 0000000 | 000000 |