Choosing an Electrical Switch
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Harsh Environment Snap-Acting Switches





Open and close circuits in a snap—even in harsh conditions. With a rubber-encased housing and stainless steel bracket, these switches handle high vibrations and resist corrosion. They’re rated IP68 for protection from dust and temporary submersion. Because they open and close circuits faster than other switches—reducing the time that contacts are near one another—they prevent contacts from sticking. They also minimize the chance of arcing, so electricity won’t jump across contacts. They’re often used as door-open indicators on enclosures or as an internal component in limit, pressure, and temperature switches.
Lever actuator switches can be pushed down by front-to-back movement, so they can be activated with pressure anywhere along their length.
Roller lever actuator switches activate when parts glide front-to-back across their actuation surface. They produce less friction than standard levers, which prevents wear and tear over time.
Simulated roller lever actuator switches have a curved arm that can be pressed down for actuation by forward, backward, and repeated back-and-forth movement.
Dual switch roller lever actuator switches actuate two SPDT switches simultaneously, giving you the equivalent of a DPDT switch. A roller at the end of the arm reduces friction and wear from parts moving across their actuation surface.
For technical drawings and 3-D models, click on a part number.
Wire Leads | Housing | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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. | Lg. | Ht. | Dp. | Lever Lg. | Each | ||
Side Mount | |||||||||||||||||
Lever Actuator Style | |||||||||||||||||
A | 1 | 1 Off (Normally Open) | Springs Back (Momentary) | SPST-NO | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 1.04" | Wire Leads | 2 | 24" | 0.86" | 1.13" | 1.75" | 4.5" | 00000000 | 0000000 |
A | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 1.04" | Wire Leads | 3 | 24" | 0.86" | 1.13" | 1.75" | 4.5" | 0000000 | 00000 |
Roller Lever Actuator Style | |||||||||||||||||
B | 1 | 1 Off (Normally Open) | Springs Back (Momentary) | SPST-NO | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.81" | Wire Leads | 2 | 24" | 1" | 1.42" | 1.75" | 1.4" | 00000000 | 000000 |
B | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.81" | Wire Leads | 3 | 24" | 1" | 1.42" | 1.75" | 1.4" | 0000000 | 00000 |
Simulated Roller Lever Actuator Style | |||||||||||||||||
C | 1 | 1 Off (Normally Open) | Springs Back (Momentary) | SPST-NO | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.81" | Wire Leads | 2 | 24" | 1" | 1.42" | 1.75" | 1.3" | 00000000 | 000000 |
C | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.81" | Wire Leads | 3 | 24" | 1" | 1.42" | 1.75" | 1.3" | 0000000 | 00000 |
Bottom Mount | |||||||||||||||||
Roller Lever Actuator Style | |||||||||||||||||
D | 1 | 1 Off (Normally Open) | Springs Back (Momentary) | SPST-NO | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.61" | Wire Leads | 2 | 24" | 1.75" | 0.34" | 1.75" | 2.2" | 00000000 | 000000 |
D | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.61" | Wire Leads | 3 | 24" | 1.75" | 0.34" | 1.75" | 2.2" | 0000000 | 00000 |
Dual Switch Roller Lever Actuator Style | |||||||||||||||||
E | 2 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 5 A @ 120 V AC, 5 A @ 28 V DC | 120V AC 28V DC | -40° to 185° | 0.6" | Wire Leads | 6 | 24" | 2.5" | 1.25" | 1.75" | 2.3" | 0000000 | 000000 |
Heavy Duty Limit Switches



Rugged enough for mining operations, these limit switches require a high actuation force, like heavy rocks moving on a conveyor. They open and close a circuit as quickly as a snap-acting switch but have a larger actuator for larger objects. The roller on the end of the lever arm reduces friction to prevent wear and tear on the switch. Rated NEMA 4 and 13 as well as IP67, these switches are protected from dirt, oil spraying, and temporary submersion.
To determine if you need a right or left actuation direction, stand facing where you'll put the switch. If objects will be passing to the right, you'll need a right actuation direction. If they'll be passing to the left, you'll need a left actuation direction.
For technical drawings and 3-D models, click on a part number.
Housing | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Actuation Direction | No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Actuation Force | Operating Temp. Range, °F | Actuator Ht. | For Max. Cable OD | Lg. | Ht. | Dp. | Each | |
Aluminum Housing with Screw Terminals | |||||||||||||||
Left | 2 | 2 Off (Normally Open) | Springs Back (Momentary) | DPST-NO | 20 A @ 120 V AC, 5 A @ 120 V DC | 600V AC 600V DC | 150 in.-oz. | -10° to 185° | 5.7" | 1/2" | 2.3" | 5" | 3.4" | 0000000 | 0000000 |
Left | 2 | 2 On (Normally Closed) | Springs Back (Momentary) | DPST-NC | 20 A @ 120 V AC, 5 A @ 120 V DC | 600V AC 600V DC | 150 in.-oz. | -10° to 185° | 5.7" | 1/2" | 2.3" | 5" | 3.4" | 0000000 | 000000 |
Right | 2 | 2 Off (Normally Open) | Springs Back (Momentary) | DPST-NO | 20 A @ 120 V AC, 5 A @ 120 V DC | 600V AC 600V DC | 150 in.-oz. | -10° to 185° | 5.7" | 1/2" | 2.3" | 5" | 2" | 0000000 | 000000 |
Right | 2 | 2 On (Normally Closed) | Springs Back (Momentary) | DPST-NC | 20 A @ 120 V AC, 5 A @ 120 V DC | 600V AC 600V DC | 150 in.-oz. | -10° to 185° | 5.7" | 1/2" | 2.3" | 5" | 2" | 0000000 | 000000 |
Right | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | 20 A @ 120 V AC, 5 A @ 120 V DC | 600V AC 600V DC | 150 in.-oz. | -10° to 185° | 5.7" | 1/2" | 2.3" | 5" | 2" | 0000000 | 000000 |