Choosing an Electrical Switch
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Frame-Mounted Safety Switches
Also known as interlock switches, these ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. Mount the switch to the door frame and mount a key to the door so that the key is inserted into the switch when the door is closed. When the door opens, the key is removed from the switch and the machine shuts down. They’re often used with machine guards.
Style A-F have positive-force, normally closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick.
IP67 rated switches protect against temporary submersion.
Flexible keys (sold separately) pivot 15° to make it easier to align with the switch 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 | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Ht. | Wd. | Dp. | Conduit Trade Size | Key Included | Environmental Rating | Each | |
Screw Terminal Connection with Positive-Force Normally Closed Contacts | |||||||||||||||
| D | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 6 A @ 120 V AC, 0.27 A @ 24 V DC | 240V AC 250V DC | 3.8" | 1.2" | 1.2" | 1/2 | Yes | IP67 | 00000000 | 0000000 |
O'all | |||||||
|---|---|---|---|---|---|---|---|
| Angle Range | Adjustability | Lg. | Wd. | Mounting Fasteners Included | Each | ||
Flexible Keys | |||||||
| For Style D | 0°-15° | Up/Down/Left/Right | 48.9mm | 55mm | No | 000000000 | 000000 |