About Motor Switches and Starters
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DIN-Rail Mount Touch-Safe Screw Terminal Relays
Quickly and safely mount these relays on 35 mm DIN rail (also known as DIN 3). IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits.
Relays that control 3 and 4 circuits are built to IEC dimensional standards and are often called IEC contactors. Those with 12 terminals let you attach the control circuit onto the side that works best for your setup, which reduces the amount of wire you need.
Auxiliary contacts (sold separately) allow you to add a signaling device or control another relay. You can add one auxiliary contact to all of these relays. For relays with 12 terminals, you can add two side-mount auxiliary contacts.
Use replacement coils to swap out a broken coil or change the input voltage of a relay. They are only compatible with relays that have 12 terminals. The full load current of the relay must match the full load current range of the coil.
Control | hp @ Switching Voltage | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage  | Power | Switching Current @ Voltage (Load Type) | Max. Switching Voltage | Single Phase | Three Phase | Ht. | Wd. | Dp. | Each | |
4 Circuits Controlled with 4 Off (Normally Open)—4PST-NO | |||||||||||
| 12 | 24V AC | 6.5VA | 9 A @ 600 V AC (Full Load) 25 A @ 600 V AC (Resistive Load) | 600 V AC | 3/4 hp @ 120 V AC 2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 3.2" | 1.8" | 3.2" | 000000000 | 000000 |
| 12 | 120V AC | 6.5VA | 9 A @ 600 V AC (Full Load) 25 A @ 600 V AC (Resistive Load) | 600 V AC | 3/4 hp @ 120 V AC 2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 3.2" | 1.8" | 3.2" | 000000000 | 00000 |
| 12 | 240V AC | 6.5VA | 9 A @ 600 V AC (Full Load) 25 A @ 600 V AC (Resistive Load) | 600 V AC | 3/4 hp @ 120 V AC 2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 3.2" | 1.8" | 3.2" | 000000000 | 00000 |
| 12 | 24V DC | 5.4W | 9 A @ 600 V AC (Full Load) 25 A @ 600 V AC (Resistive Load) | 600 V AC | 3/4 hp @ 120 V AC 2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 3.2" | 1.8" | 3.9" | 00000000 | 000000 |
| Number of Circuits Controlled | For Relay Width | Switch Starting Position | Industry Designation | Mounting Location | Each | |
| 2 | 1.8", 2.4" | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Front | 00000000 | 000000 |
| 2 | 1.8", 2.4" | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | Side | 00000000 | 00000 |
| 2 | 1.8", 2.4" | 2 Off (Normally Open) | DPST-NO | Front | 0000000 | 00000 |
| 2 | 1.8", 2.4" | 2 On (Normally Closed) | DPST-NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.4" | 1 Off (Normally Open) and 3 On (Normally Closed) | 4PST-1NO/3NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.4" | 2 Off (Normally Open) and 2 On (Normally Closed) | 4PST-2NO/2NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.4" | 3 Off (Normally Open) and 1 On (Normally Closed) | 4PST-3NO/1NC | Front | 0000000 | 00000 |
| 4 | 1.8", 2.4" | 4 Off (Normally Open) | 4PST-NO | Front | 0000000 | 00000 |
| 4 | 1.8", 2.4" | 4 On (Normally Closed) | 4PST-NC | Front | 0000000 | 00000 |
Safety Relays
Receive signals from safety monitoring relays or controllers to switch devices off and on because of a system failure. Also known as force-guided or mechanically linked contacts, the interlocking opposing contacts on these relays cannot be open or closed at the same time. To keep your system from receiving false switching signals, the interlocking opposing contact must remain open even if a contact welds closed.
IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits. These relays have been tested to safety standards that can help you achieve your system's PL (performance level) and SIL (safety integrity level). Choose a relay with a PL and SIL rating to meet the needs of your system. Higher ratings indicate greater safety protection. As your system becomes more complex, you generally require a higher safety protection level. Mount them to 35mm DIN rail (also known as DIN 3 Rail).
Relays that meet SIL3 are tested for applications with a probability of failure of 0.01% to 0.1% and are used for preventing fires, explosions, or toxic releases. Relays that meet CAT 4 withstand circuit surges in electrical applications up to 600V.
When a failure is detected, relays with self-monitoring circuitry signal the controller to remove power and prevent restarting until the issue is resolved.
Relays with nondetachable contacts have auxiliary contacts that won’t separate from the relay if there is shock or vibration. Relays with mirror auxiliary contacts have contacts that are normally closed and cannot be open at the same time as a normally open main contact.
hp @ Switching Voltage | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Single Phase | Three Phase | Auxiliary Contact Switch Starting Position | Ht. | Wd. | Dp. | Features | Each | |
With Screw Terminals—DIN-Rail and Surface Mount | |||||||||||||
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO | |||||||||||||
| 18 | 120V AC | 2 | 9 A @ 400 V AC | 600V AC | 1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 2 Off (Normally Open) or 3 On (Normally Closed) | 2.7" | 1.8" | 4.6" | Interlocked Opposing Contacts, Recessed Terminals, Self-Monitoring Circuitry, Nondetachable Auxiliary Contacts, Mirror Auxiliary Contacts, Inspection Window | 0000000 | 0000000 |
| 18 | 24V DC | 18 | 9 A @ 400 V AC | 600V AC | 1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC | 3 hp @ 240 V AC 5 hp @ 480 V AC 7 1/2 hp @ 600 V AC | 2 Off (Normally Open) or 3 On (Normally Closed) | 2.7" | 1.8" | 4.6" | Interlocked Opposing Contacts, Recessed Terminals, Self-Monitoring Circuitry, Nondetachable Auxiliary Contacts, Mirror Auxiliary Contacts, Inspection Window | 0000000 | 000000 |
Energy-Saving Motor Starters
Save electricity and extend motor life by reducing the motor's starting current. These starters gradually start and stop motors. Use them on motors where torque varies, such as pumps, compressors, and conveyors. All have an auxiliary contact to send a signal or connect to another device, such as an alarm or indicating light.
Switching | Time, sec. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Full Load Current, A | Input Voltage | Voltage | Current | Electrical Phase (hp) | Acceleration | Deceleration | Ht. | Wd. | Mount. Location | For DIN Rail Ht., mm | Each | |
Motor Starters with 1 Auxiliary Contact—1 Off (Normally Open) | ||||||||||||
| 9 | 24V DC | 208-600V AC | 9A | Three (2 hp @ 240 V AC) Three (5 hp @ 480 V AC) | 1-20 | 0-20 | 5.5" | 1.8" | DIN Rail, Surface | 35 | 0000000 | 0000000 |