Choosing an Electrical Switch
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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.
Switches with an LED status indicator light up when they’re actuated, so you can see if they’re wired correctly with a quick glance.
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 | Cables with Socket | 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 | Each | ||||
Plastic Housing with Wire Leads | |||||||||||||||||||
| A | 1 | 1 On (Normally Closed) | SPST-NC | 6.3 A @ 120 V AC | 250V AC | 24V DC | 0.2" | 1.2" | 3.1" | __ | __ | M30 | IP67 | 0000000 | 0000000 | 000000 | 00 | 0000000 | 000000 |
| 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 | 00000 | 000000 | 00 | 0000000 | 00000 |
| B | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 0.5 A @ 120 V AC/120 V DC | 120V AC 120V DC | 120V AC 120V DC | 0.2" | __ | 3.5" | 1" | 0.5" | __ | IP67 | 0000000 | 000000 | 000000 | 00 | 0000000 | 00000 |
| B | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | 3PST-1NO/2NC | 10 mA @ 24 V DC | 24V DC | 24V DC | 0.2" | __ | 3.5" | 1" | 0.5" | __ | IP67 | 0000000 | 000000 | 000000 | 00 | 0000000 | 00000 |
| 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 | 000000 | 00 | 0000000 | 00000 |
Plastic Housing with Wire Leads and LED Status Indicator | |||||||||||||||||||
| B | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 10 mA @ 24 V DC | 24V DC | 24V DC | 0.2" | __ | 3.5" | 1" | 0.5" | __ | IP67 | 0000000 | 000000 | 000000 | 00 | 0000000 | 00000 |
Plastic Housing with 4-Pole Nano M8 Plug and LED Status Indicator | |||||||||||||||||||
| B | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 10 mA @ 24 V DC | 24V DC | 24V DC | 0.2" | __ | 3.5" | 1" | 0.5" | __ | IP67 | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 00000 |
| B | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | 3PST-1NO/2NC | 10 mA @ 24 V DC | 24V DC | 24V DC | 0.2" | __ | 3.5" | 1" | 0.5" | __ | IP67 | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |
Tamper-Resistant Magnetic Contact Alarm Switches
Prevent unauthorized use of doors or windows with a combination of coded magnets and contacts that wire to an alarm system. The coded magnets mean they can’t be bypassed with regular magnets. These switches actuate when the magnet comes within sensing distance of the switch and reset when the magnet moves away. Mount the magnet to your door or window and the switch to the frame. Connect the switch contacts to an alarm system, which will trigger when the magnet is pulled away as your door or window is opened.
Flush-mount switches are designed to mount against the door jam. They have a cord grip to reduce strain on your cord.
Surface-mount switches mount on the surface of your door. Those with a 1/2 conduit connection are ready to directly attach to your conduit.
For technical drawings and 3-D models, click on a part number.
| No. of Circuits Controlled | Switch Starting Position | Industry Designation | Switching Current @ Voltage | Max. Sensing Distance | No. of Terminals | Conduit Trade Size | Lg. | Wd. | Ht. | Features | Environmental Rating | Each | |
Painted Zinc Housing with Screw Terminals | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Screw On—Flush Mount | |||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 0.2 A @ 30 V DC | 0.26" | 7 | __ | 4.33" | 1.38" | 1.26" | Auxiliary NO (Normally Open) Alarm, Nickel-Plated Brass Cord Grip | IP67 | 0000000 | 000000000 |
Screw On—Surface Mount | |||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 0.2 A @ 30 V DC | 0.26" | 7 | __ | 2.96" | 1.38" | 1.34" | Auxiliary NO (Normally Open) Alarm | IP67 | 0000000 | 00000000 |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | DPST-1NO/1NC | 0.2 A @ 30 V DC | 0.26" | 7 | 1/2 | 2.96" | 1.38" | 1.34" | Auxiliary NO (Normally Open) Alarm | IP67 | 0000000 | 00000000 |