Choosing an Electrical Switch
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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 |
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 |
Tilt Switches
Often used as position indicators, pump level controls, and machine limit switches, these switches actuate when tilted to a certain angle. They mount horizontally and activate when tilted downward, and deactivate when tilted up. Differential angle is the total angle from the point of activation to the point of deactivation. All combine electromechanical and solid state technologies for reliability and long life.
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. Voltage | Differential Angle | No. of Wire Leads | Dia. | Lg. | Ht. | Dp. | Housing Material | Environmental Rating | Each | ||
With Ring Terminals | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 1 | 1 Off (Normally Open) | SPST-NO | 0.1 A @ 120 V AC, 0.25 A @ 24 V DC | 60V DC/120V AC | 15° | 2 | 0.53" | 1.88" | __ | __ | Plastic | NEMA 4, IP67 | 000000 | 000000 |
With Spade Terminals | |||||||||||||||
| A | 1 | 1 Off (Normally Open) | SPST-NO | 2.5 A @ 120 V AC | 280V AC | 15° | 2 | 0.53" | 1.88" | __ | __ | Plastic | NEMA 4, IP67 | 000000 | 00000 |
With Wire Leads | |||||||||||||||
| D | 1 | 1 Off (Normally Open) | SPST-NO | 15 A @ 120 V AC | 120V AC | 15° | 3 | __ | 3" | 1.5" | 2" | Plastic | NEMA 4, IP67 | 000000 | 000000 |
| E | 1 | 1 On (Normally Closed) | SPST-NC | 2 A @ 120 V AC | 220V AC | 25° | 2 | __ | 1.5" | 0.8" | 1.3" | Plastic | NEMA 4, IP67 | 000000 | 00000 |
| E | 1 | 1 On (Normally Closed) | SPST-NC | 2 A @ 120 V AC | 220V AC | 40° | 2 | __ | 1.5" | 0.8" | 1.3" | Plastic | NEMA 4, IP67 | 000000 | 00000 |
Air-Actuated Foot Switches
Press these switches with your foot for convenient, hands-free operation. They use air pressure to turn circuits on or off, keeping live electrical circuits away from work areas. Use the three-prong outlet to plug a device directly into the switch.
| No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Dia. | Lg. | Wd. | Ht. | Guard Material | Includes | Each | |
With Three-Prong Outlet | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 2 | SPST-NO | 15 A @ 120 V AC | 3 3/4" | __ | __ | 1 1/2" | __ | 10 ft. Tubing | 0000000 | 000000 |
| 1 | 1 Off (Normally Open) | Stays Switched (Maintained) | 2 | SPST-NO | 15 A @ 120 V AC | 3 3/4" | __ | __ | 1 1/2" | __ | 10 ft. Tubing | 0000000 | 00000 |
With Three-Prong Outlet and Guard | |||||||||||||
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 2 | SPST-NO | 15 A @ 120 V AC | __ | 6" | 6 1/2" | 4 11/16" | Plastic | 10 ft. Tubing | 0000000 | 00000 |
| 1 | 1 Off (Normally Open) | Stays Switched (Maintained) | 2 | SPST-NO | 15 A @ 120 V AC | __ | 6" | 6 1/2" | 4 11/16" | Plastic | 10 ft. Tubing | 0000000 | 00000 |
Speed-Monitoring Switches
Detect unwanted slowdowns in a rotary shaft that could cause machine damage and downtime. These switches are often used on drivetrains, conveyors, and other power-driven components. They come with a pulser disc, which you’ll need to attach to the shaft by drilling and tapping a hole. Once mounted, the disc rotates with the shaft and creates magnetic signals that the switch senses. When the speed falls below a set point, the switch will trigger an alarm or turn off the system.
Switches are UL listed and rated NEC Class I, Divisions 1 and 2, Groups C and D; and Class II, Divisions 1 and 2, Groups E, F, and G. They have an explosion-proof housing and are also rated NEMA 4X for washdown and corrosion protection.
For technical drawings and 3-D models, click on a part number.
Switching | Input | Conduit | Mounting Slot | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Activation Point Range, rpm | Current, A | Voltage | Voltage | Frequency, Hz | No. of Terminals | Trade Size | Thread Type | Gender | Lg. | Wd. | No. of | Mounting Fasteners Included | Environmental Rating | Each | |
1 Off (Normally Open), 1 On (Normally Closed) Starting Switch Position | |||||||||||||||
SPDT | |||||||||||||||
| 5-100 | 5 | 120V AC | 120V AC | 60 | 5 | 1 | NPT | Female | 1 1/4" | 0.32" | 2 | Yes | NEC Class I Divisions 1, 2 Groups C, D NEC Class II Divisions 1, 2 Groups E, F, G NEMA 4X | 0000000 | 0000000 |