Choosing an Electrical Switch
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Limit Switches
When a moving object contacts the actuator on these switches, they open or close a circuit. They 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 roller plunger or cross roller plunger actuator have a roller that moves when an object pushes the actuator. This reduces friction during actuation to limit wear and tear on your switch.
Switches with a roller lever actuator use a lever with a roller at the end to activate. This allows parts to glide across the actuation surface with minimal friction, limiting wear and tear on your switch.
Switches with a 4-pole micro M12 plug connect to cables with a socket (sold separately), allowing you to quickly connect and disconnect the switch.
Styles E and F let you adjust the actuator’s height to align it with your target.
Switches rated IP67 are protected against dust and temporary submersion.
For technical drawings and 3-D models, click on a part number.
Switches | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Housing | Cables with Socket | ||||||||||||||||
| Style | 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 | Environmental Rating | Each | Each | ||
Plunger Actuator Style | |||||||||||||||||
With 4-Pole Micro M12 Plug | |||||||||||||||||
| A | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 3 A @ 250 V AC, 250 V DC | 250V AC 250V DC | -22° to 158° | 0.8" | 1.1" | 2.5" | 1.2" | Plastic | IP67 | 00000000 | 000000 | 0000000 | 000000 |
Roller Plunger Actuator Style | |||||||||||||||||
With 4-Pole Micro M12 Plug | |||||||||||||||||
| B | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 3 A @ 250 V AC, 250 V DC | 250V AC 250V DC | -22° to 158° | 1.2" | 1.1" | 2.5" | 1.2" | Plastic | IP67 | 00000000 | 00000 | 0000000 | 00000 |
Roller Lever Actuator Style | |||||||||||||||||
With 4-Pole Micro M12 Plug | |||||||||||||||||
| D | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 3 A @ 250 V AC, 250 V DC | 250V AC 250V DC | -22° to 158° | 1.5" | 1.1" | 2.5" | 1.2" | Plastic | IP67 | 00000000 | 00000 | 0000000 | 00000 |
| E | 1 | 1 Off (Normally Open) or 1 On (Normally Closed) | Springs Back (Momentary) | SPDT | 3 A @ 250 V AC, 250 V DC | 250V AC 250V DC | -22° to 158° | 1.5"-3.3" | 1.1" | 2.5" | 1.2" | Plastic | IP67 | 00000000 | 00000 | 0000000 | 00000 |
Build-Your-Own Limit Switches
Combine an actuator and a switch to assemble the exact limit switch you need. 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 for conveyor systems and elevators. Each actuator style is compatible with all housing styles and vice versa.
Switches with a polypropylene plastic housing are lighter in weight than metal switches. Switches with a zinc housing are more durable than those with a plastic housing.
Switches with a 4-pole micro M12 plug quickly connect and disconnect from your setup. Use cables (sold separately) to wire your switch connection to your setup.
Switches with an LED power indicator and LED status indicator show you the status of the line and load phases. They give you extra assurance that your switch is connected and wired correctly.
Switches with 2 conduit connections allow you to wire switches side by side, so you can save space and simplify your wiring.
IP65 switches protect against dust and splashing water. IP66 switches protect against dust and washdowns. IP67 switches protect against dust and temporary submersion.
For technical drawings and 3-D models, click on a part number.
Screw
Terminals
Terminals and
LED Indicator
4-Pole
Micro M12 Plug
Switches | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Housing | Conduit | Cables | |||||||||||||||
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | No. of Terminals | Lg. | Ht. | Dp. | No. of Connections | Thread Size | Environmental Rating | Specifications Met | Each | Each | ||
Polypropylene Plastic Housing | |||||||||||||||||
Screw Terminals | |||||||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | 6 A @ 240 V AC, 3 A @ 24 V DC | 400V AC 400V DC | 4 | 1.2" | 2.7" | 1.3" | 1 | M20 | IP65 | EN 50047 UL Listed C-UL Listed CE Marked CCC Marked | 0000000 | 000000 | 000000 | 00 |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | 6 A @ 240 V AC, 3 A @ 24 V DC | 400V AC 400V DC | 4 | 2" | 2.1" | 1.3" | 2 | M20 | IP66, IP67 | EN 50047 UL Listed C-UL Listed CE Marked CCC Marked | 0000000 | 000000 | 000000 | 00 |
Screw Terminals—LED Power Indicator and LED Status Indicator | |||||||||||||||||
| 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Springs Back (Momentary) | 3PST-1NO/2NC | 3 A @ 24 V DC | 24V DC | 6 | 1.2" | 2.7" | 1.3" | 1 | M20 | IP65 | EN 50047 UL Listed C-UL Listed CE Marked CCC Marked | 0000000 | 000000 | 000000 | 00 |
4-Pole Micro M12 | |||||||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | 4 A @ 240 V AC, 3 A @ 24 V DC | 250V AC 250V DC | __ | 1.2" | 2.7" | 1.3" | __ | __ | IP65 | EN 50047 UL Listed C-UL Listed CE Marked CCC Marked | 0000000 | 000000 | 0000000 | 000000 |
Zinc Housing | |||||||||||||||||
Screw Terminals | |||||||||||||||||
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | DPST-1NO/1NC | 6 A @ 240 V AC, 3 A @ 24 V DC | 400V AC 400V DC | 4 | 1.2" | 2.7" | 1.3" | 1 | M20 | IP66, IP67 | EN 50047 UL Listed C-UL Listed CE Marked CCC Marked | 0000000 | 000000 | 000000 | 00 |