Choosing an Electrical Switch
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Sealed Low-Profile Limit Switches
A sealed actuator prevents these switches from jamming, even when exposed to sand, mud, or dirt. They're also rated IP67 for temporary submersion. With a slim design, you can stack them or fit them in tight spaces. When an object in motion comes into contact with the actuator, it sends a signal to open or close a circuit. These switches have the rapid-closing action of a snap-acting switch, but with a larger actuator. This makes them a good choice for use with large objects. For instance, a box on a conveyor runs into the switch, stopping the conveyor.
Switches with a plunger actuator require a push to actuate, similar to a button.
Switches with a powder-coated zinc or plastic housing are rated NEMA 4 and 13 for protection from washdowns and oil/coolant spraying.
Housing | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Operating Temp. Range, °F | Actuator Ht. | No. of Wire Leads | Cable Lead Lg., ft. | Lg. | Ht. | Dp. | Housing Material | Each | ||
Plunger Actuator Style | ||||||||||||||||
With Wire Leads | ||||||||||||||||
| A | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 3 A @ 240 V AC, 0.55 A @ 125 V DC | 240V AC 250V DC | -13° to 158° | 1.3" | 4 | 3 | 1.2" | 2.2" | 0.7" | Plastic | 0000000 | 000000 |
| A | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 3 A @ 240 V AC, 0.55 A @ 125 V DC | 240V AC 250V DC | -13° to 158° | 1.3" | 4 | 3 | 1.2" | 2.2" | 0.7" | Powder-Coated Zinc | 0000000 | 00000 |