Choosing an Electrical Switch
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Panel-Mount Sealed Wet-Location Limit Switches
Sealed actuators prevent these switches from jamming, even when exposed to oil, sand, mud, or ice. They send a signal to your circuit when an object hits the actuator—for instance, a box on a conveyor runs into the switch, stopping the conveyor. They open and close circuits as fast as snap-acting switches, but they have a bigger actuator for large objects. To actuate, they require a push, similar to a button. Rated IP68, they’re protected against dust and temporary submersion.
Wire Leads | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | Lg. | Housing Ht. | Mounting Thread Size | Each | |
Zinc-Plated Steel Housing | ||||||||||||||
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | SPST-NO | 5 A @ 28 V DC | 28V DC | -50° to 205° | 0.13" | Wire Leads | 2 | 24" | 1.2" | 9/16"-18 | 0000000 | 000000 |
| 1 | 1 On (Normally Closed) | Springs Back (Momentary) | SPST-NC | 5 A @ 28 V DC | 28V DC | -50° to 205° | 0.13" | Wire Leads | 2 | 24" | 1.2" | 9/16"-18 | 0000000 | 000000 |
Panel-Mount Low-Profile Limit Switches
Secure these switches into panel cutouts using mounting nuts. They have a slim body so they can also be stacked together or fit into tight spaces. These switches have the rapid-closing action of a snap-acting switch, but have a larger actuator for large objects. 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. All are rated IP67 for protection from temporary submersion. They have a 4-pole micro M12 plug that connects to cables with a socket (sold separately), allowing you to quickly connect and disconnect the switch.
Plunger actuators open or close circuits when objects push against them.
Roller-plunger actuators open or close circuits when an object pushes against the roller, which moves the plunger. The roller moves parallel to the mounting direction, so it helps push the plunger even if the force isn’t straight on. The roller also reduces friction during actuation which prevents wear and tear over time.
Housing | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Operating Temp. Range, °F | Actuator Ht. | Lg. | Ht. | Dp. | Housing Material | For Panel Cutout Dia. | Each | |
Plunger Actuator Style | ||||||||||||||
With 4-Pole Micro M12 Plug | ||||||||||||||
| 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 1 A @ 125 V AC | 125V AC | 14° to 158° | 0.8" | 1.6" | 2.2" | 0.6" | Aluminum | 0.57" | 0000000 | 0000000 |
Roller Plunger Actuator Style | ||||||||||||||
With 4-Pole Micro M12 Plug | ||||||||||||||
| 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 1 A @ 125 V AC | 125V AC | 14° to 158° | 1" | 1.6" | 2.2" | 0.6" | Aluminum | 0.57" | 0000000 | 000000 |
| Cable with Socket | 0000000 | Each | 000000 |