Choosing an Electrical Switch
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Washdown 3/4" Panel-Mount Key Switches
Rated NEMA 4, these switches are protected from washdowns. They require a key to turn circuits on or off, limiting access to sensitive equipment.
Keyed alike switches all open with the same key.
Keyed differently switches each open with a unique key.
For technical drawings and 3-D models, click on a part number.
Key Switches | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Key | Replacement Keys | ||||||||||||||
| No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Dia. | Dp. Behind Panel | No. of Keys Included | Removal Position | Environmental Rating | Each | Each | ||
2 Position with Metal Base | |||||||||||||||
Keyed Alike with Screw Terminals | |||||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 10 A @ 300 V AC/24 V DC | 24V DC 300V AC | 7/8" | 1 7/8" | 2 | Center, Right | NEMA 4, IP66 | 0000000 | 000000 | 000000 | 00000 |
Keyed Differently with Screw Terminals | |||||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 10 A @ 300 V AC/24 V DC | 24V DC 300V AC | 7/8" | 1 7/8" | 2 | Center, Right | NEMA 4, IP66 | 0000000 | 00000 | 000000 | 00 |
Wet-Location Limit Switches
Rated IP67, these switches are protected from temporary submersion. When an object in motion comes into contact with the actuator, it sends a signal to open or close a circuit. They’re often used on conveyor systems and elevators.
Styles D and E have an actuator that allows you to adjust its height, making it easier to align the switch with the target during installation.
For technical drawings and 3-D models, click on a part number.
Housing | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Operating Temp. Range, °F | Actuator Ht. | Wire Connection Type | No. of Terminals | Lg. | Ht. | Dp. | Housing Material | Conduit Trade Size | Each | |
Plunger Actuator Style | |||||||||||||||||
| A | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 6 A @ 24 V DC | 300V AC/250V DC | 14° to 176° | 1.1" | Screw Terminals | 4 | 1.6" | 2.7" | 1.6" | Aluminum | 1/2 | 0000000 | 000000 |
Roller Plunger Actuator Style | |||||||||||||||||
| B | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 6 A @ 24 V DC | 300V AC/250V DC | 14° to 176° | 1.6" | Screw Terminals | 4 | 1.6" | 2.7" | 1.6" | Aluminum | 1/2 | 0000000 | 00000 |
Roller Lever Actuator Style | |||||||||||||||||
| C | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 6 A @ 24 V DC | 300V AC/250V DC | 14° to 176° | 2.2" | Screw Terminals | 4 | 1.6" | 2.7" | 1.6" | Aluminum | 1/2 | 0000000 | 00000 |
| D | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 6 A @ 24 V DC | 300V AC/250V DC | 14° to 176° | 1.7"-4.2" | Screw Terminals | 4 | 1.6" | 2.7" | 1.6" | Aluminum | 1/2 | 0000000 | 00000 |
Rod Actuator Style | |||||||||||||||||
| E | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 6 A @ 24 V DC | 300V AC/250V DC | 14° to 176° | 1.4"-5.9" | Screw Terminals | 4 | 1.6" | 2.7" | 1.6" | Aluminum | 1/2 | 0000000 | 00000 |
Wobble Stick Actuator Style | |||||||||||||||||
| F | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 6 A @ 24 V DC | 300V AC/250V DC | 14° to 176° | 5.3" | Screw Terminals | 4 | 1.6" | 2.7" | 1.6" | Aluminum | 1/2 | 0000000 | 00000 |
Compact Safety Limit Switches
Shorter and thinner than other safety limit switches, these are sized to fit tight spaces. They protect machinery and ensure the safety of personnel. Positive-force contacts open the circuit when actuated, even if a spring fails or the contacts stick. When an object in motion comes into contact with the actuator, it sends a signal to open or close a circuit. They’re often used on conveyor systems and bin filling operations. All are NEMA and IP rated for protection from washdowns.
Styles E and F have an actuator that allows you to adjust its height, making it easier to align switch with the target during installation.
NEMA 13 and IP67 rated switches are protected from oil/coolant spraying and temporary submersion.
For technical drawings and 3-D models, click on a part number.
Housing | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Operating Temp. Range, °F | Actuator Ht. | Wire Connection Type | Lg. | Ht. | Dp. | Housing Material | Environmental Rating | Each | |
Plunger Actuator Style | ||||||||||||||||
| A | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 10 A @ 250 V DC | 300V AC 250V DC | -40° to 185° | 0.7" | Screw Terminals | 1.2" | 2.4" | 1.2" | Zinc | NEMA 4, NEMA 13, IP66, IP67 | 0000000 | 000000 |
Roller Plunger Actuator Style | ||||||||||||||||
| B | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 10 A @ 250 V DC | 300V AC 250V DC | -40° to 185° | 1.1" | Screw Terminals | 1.2" | 2.4" | 1.2" | Zinc | NEMA 4, NEMA 13, IP66, IP67 | 0000000 | 000000 |
Roller Lever Actuator Style | ||||||||||||||||
| D | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 10 A @ 250 V DC | 300V AC 250V DC | -40° to 185° | 2.1" | Screw Terminals | 1.2" | 2.4" | 1.2" | Zinc | NEMA 4, NEMA 13, IP66, IP67 | 0000000 | 00000 |
| E | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 10 A @ 300 V AC, 10 A @ 250 V DC | 300V AC 250V DC | -40° to 185° | 0.9"-3" | Screw Terminals | 1.2" | 2.4" | 1.2" | Zinc | NEMA 4, NEMA 13, IP66, IP67 | 0000000 | 00000 |
Solid State Screw Terminal Relays
With no moving parts, these solid-state relays are fast switching and require less maintenance, last longer, and are quieter than mechanical switches.
Heat sinks disperse heat to increase the relay’s current rating. Mount them to 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They also mount to flat surfaces. Before mounting one-circuit relays, silicone compound should be applied between the heat sink and relay. Silicone is sold separately for 75A and 90A one-circuit relays. Two-circuit relays don’t require silicone for mounting.
Relays | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching Current | Heat Sinks | |||||||||||
| Number of Terminals | Input Voltage | Without Heat Sink | With Heat Sink | Switching Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | Each | Each | ||
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | ||||||||||||
Relays with High-Starting-Current Protection | ||||||||||||
| 4 | 70V AC, 120V AC, 140V AC | 7.5A | 25A | 300V AC | 300V AC | 2.3" | 1.8" | 1.1" | 0000000 | 0000000 | 0000000 | 0000000 |
| 4 | 12V AC, 24V AC, 3V DC, 6V DC, 12V DC, 24V DC, 30V DC | 7.5A | 25A | 300V AC | 300V AC | 2.3" | 1.8" | 1.1" | 0000000 | 000000 | 0000000 | 000000 |
1 Circuit Controlled with 1 On (Normally Closed)—SPST-NC | ||||||||||||
Relays with High-Starting-Current Protection | ||||||||||||
| 4 | 70V AC, 120V AC, 140V AC | 7.5A | 25A | 300V AC | 300V AC | 2.3" | 1.8" | 1.1" | 0000000 | 000000 | 0000000 | 000000 |
| 4 | 12V AC, 24V AC, 3V DC, 6V DC, 12V DC, 24V DC, 30V DC | 7.5A | 25A | 300V AC | 300V AC | 2.3" | 1.8" | 1.1" | 0000000 | 000000 | 0000000 | 000000 |