Choosing an Electrical Switch
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Pendant Switches
Control machinery from a safe distance, or use these switches as call buttons.
For technical drawings and 3-D models, click on a part number.
Wire Leads | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Buttons | No. of Circuits Controlled per Actuator | Switch Starting Position | Switch Action | No. of Terminals per Actuator | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Housing Material | No. of | Ga. | Lg., ft. | Each | |
1 Speed with Wire Leads | |||||||||||||
| 1 | 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 2 | SPST-NO | 0.4 A @ 120 V AC, 0.5 A @ 24 V DC | 48V DC 120V AC | Gray Plastic | 2 | 18 | 6 | 0000000 | 000000 |
Magnetically Actuated Switches
These switches actuate when a magnet comes within sensing distance, and reset when the magnet moves away. They’re often used to detect when a door or window opens. Mount the switch in a stationary position, such as a door frame, and mount the magnet to a movable object, such as the door. They do not include a safety relay and cannot be used with safety-guard doors found on machinery.
For technical drawings and 3-D models, click on a part number.
Magnetically Actuated Switches | Replacement Magnets | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Industry Designation | Switching Current @ Voltage | Max. Voltage | Max. Sensing Distance | No. of Wire Leads | Dia. | Lg. | Each | Each | |||
Plastic Housing with Wire Leads | |||||||||||||
| D | 1 | 1 Off (Normally Open) | SPST-NO | 0.4 A @ 24 V DC | 170V DC | 0.15" | 2 | 0.18" | 0.43" | 00000000 | 000000 | 000000000 | 000000 |
Tamper-Resistant Magnetically Actuated Switches
Prevent unauthorized use—these switches require coded magnets (sold separately) to actuate, and cannot be bypassed using ordinary magnets. They actuate when a magnet comes within sensing distance, and reset when the magnet moves away. Mount the switch in a stationary position, such as a door frame, and mount the magnet to a movable object, such as the door. They’re often used to detect when a door or window opens, and can be used with movable machine guards. All are rated IP67 for protection from temporary submersion.
Coded magnets include tamper-resistant one-way screws for mounting. To remove screws, see one-way bits and drivers.
Safety relays are required in safety applications with switches that control two or three circuits.
For technical drawings and 3-D models, click on a part number.
Switches | Coded Magnets | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Industry Designation | Switching Current @ Voltage | Max. Voltage | Input Voltage | Max. Sensing Distance | Dia. | Lg. | Wd. | Ht. | Mounting Thread Size | Environmental Rating | Each | Each | |||
Plastic Housing with Wire Leads | |||||||||||||||||
| A | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 0.28 A @ 120 V AC, 0.4 A @ 170 V DC | 120V AC 170V DC | 120V AC 170V DC | 0.2" | 1.2" | 1.3" | __ | __ | M30 | IP67 | 0000000 | 000000 | 0000000 | 000000 |
| B | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | 3PST-1NO/2NC | 0.4 A @ 100 V AC/100 V DC | 100V AC 100V DC | 100V AC 100V DC | 0.2" | __ | 3.5" | 1" | 0.5" | __ | IP67 | 0000000 | 000000 | 0000000 | 00000 |