Choosing an Electrical Switch
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Flush-Mount 30 mm Panel-Mount Push-Button Switches
The face of these switches mounts flush against a panel, so they're easy to clean and hard to damage. All are rated NEMA 4, 13, and IP65 for protection from corrosive, damp, dusty, oily, outdoor and washdown environments.
Add a bulb (sold separately) to illuminate switches. If wiring the switch and the bulb to the same circuit, the circuit voltage must not exceed bulb voltage.
Additional contact blocks (sold separately) can be added to control more circuits, or to replace the included contact block.
For technical drawings and 3-D models, click on a part number.
| No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage  | Dia. | Dp. Behind Panel | For Max. No. of Contact Blocks | Choose an Actuator Color | Each | |
Metal Base with Screw Terminals | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 2 | SPST-NO | 4.5 A @ 230 V AC, 2.5 A @ 24 V DC | 110V DC 500V AC | 1 3/8" | 3 1/16" | 3 | Blue | 0000000 | 000000 |
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 2 | SPST-NO | 4.5 A @ 230 V AC, 2.5 A @ 24 V DC | 110V DC 500V AC | 1 3/8" | 3 1/16" | 3 | Green | 0000000 | 00000 |
| 1 | 1 On (Normally Closed) | Springs Back (Momentary) | 2 | SPST-NC | 6 A @ 230 V AC, 10 A @ 24 V DC | 110V DC 500V AC | 1 3/8" | 3 1/16" | 3 | Red | 0000000 | 00000 |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Springs Back (Momentary) | 4 | DPST-1NO/1NC | 4.5 A @ 230 V AC, 2.5 A @ 24 V DC | 110V DC 500V AC | 1 3/8" | 3 1/16" | 3 | 000000 | 00000 | |
Metal Base with Screw Terminals and Push Reset | ||||||||||||
| 1 | 1 Off (Normally Open) | Stays Switched (Maintained) | 2 | SPST-NO | 6 A @ 230 V AC, 10 A @ 24 V DC | 110V DC 500V AC | 1 3/8" | 3 1/16" | 3 | Green | 0000000 | 00000 |
| 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 4.5 A @ 230 V AC, 2.5 A @ 24 V DC | 110V DC 500V AC | 1 3/8" | 3 1/16" | 3 | Green | 0000000 | 00000 |
Frame-Mounted Safety Switches
Also known as interlock switches, these ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. Mount the switch to the door frame and mount a key to the door so that the key is inserted into the switch when the door is closed. When the door opens, the key is removed from the switch and the machine shuts down. They’re often used with machine guards.
Style A-F have positive-force, normally closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick.
IP67 rated switches protect against temporary submersion.
Flexible keys (sold separately) pivot 15° to make it easier to align with the switch during installation.
For technical drawings and 3-D models, click on a part number.
Housing | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Ht. | Wd. | Dp. | Conduit Thread Size | Key Included | Environmental Rating | Each | |
Screw Terminal Connection with Positive-Force Normally Closed Contacts | |||||||||||||||
| C | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 4 A @ 230 V AC, 4 A @ 24 V DC | 24V DC 500V AC | 3.5" | 2" | 1.2" | M16 | Yes | IP67 | 00000000 | 0000000 |
| E | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 8 A @ 230 V AC, 5 A @ 24 V DC | 24V DC 400V AC | 4.2" | 2" | 1.6" | M20 | No | IP67 | 00000000 | 00000 |
| E | 2 | 2 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-NC | 8 A @ 230 V AC, 5 A @ 24 V DC | 24V DC 400V AC | 4.2" | 2" | 1.6" | M20 | No | IP67 | 00000000 | 00000 |
Screw Terminal Connection with Positive-Force Normally Closed Contacts and Rotating Head | |||||||||||||||
| F | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 10 A @ 230 V AC, 4 A @ 24 V DC | 24V DC 250V AC | 4.3" | 1.6" | 1.4" | M20 | No | IP67 | 00000000 | 000000 |
DIN-Rail Mount Solid State Relays
Unlike mechanical relays, these solid state relays have no moving parts, so they require less maintenance and last longer, switch faster, and are quieter. They mount on 35 mm DIN rail (also known as DIN 3) for fast installation. IP20 rated, their terminals are recessed, so they prevent fingers and other objects from touching live circuits.
Relays with an integrated fan are best for applications that generate more heat. The fan automatically turns on to provide additional cooling. When the temperature exceeds 176° F, an alarm sends a signal to an external device, such as a controller or indicating light.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage (Load Type) | Max. Switching Voltage | hp @ Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Single Phase | |||||||||||
| 4 | 3V DC, 6V DC, 12V DC, 24V DC, 30V DC | 11 | 30 A @ 230 V AC (Full Load) | 264V AC | 3/4 hp @ 115 V AC 2 hp @ 230.000 V AC | 4.33" | 0.89" | 4.917" | Integrated Heat Sink, LED Indicator | 0000000 | 0000000 |
Analog-Input Proportional-Control Relays
Often used to regulate the speed of AC fans or keep a heater at a set temperature, these relays connect directly to sensors to calculate and adjust output power. This allows you to use an analog input without converting it to a digital signal to control output power. They are solid state and have no moving parts, so they require less maintenance and last longer, are quieter, and switch faster than mechanical relays. IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits. An integrated heat sink disperses heat to increase the relay’s current rating. The LED indicator shows input voltage loss and internal relay faults, so you can easily check that your system is operating properly.
Mount them on 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They also mount to flat surfaces.
All relays have phase-angle switching to accurately control all types of loads. This mode signals at non-zero voltage, which can produce electrical noise.
Single-phase relays can be set to switch every 1, 4, or 16 cycles. When used with infrared heaters, they have an option to switch at the half cycle and again at the full cycle. When switching at 16 cycles or at the half cycle, these relays have a soft-start option to increase the output slower in high-inrush current applications.
Relays with a potentiometer input can connect to an external potentiometer for manual control.
For technical drawings and 3-D models, click on a part number.
Input | Output | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Voltage | Current | No. of | Voltage | Current | No. of | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO | |||||||||||||||
Single Phase with Phase Angle Switching Mode | |||||||||||||||
| 4 | __ | 4-20mA | 1 | 85-265V AC | 30A | 1 | 50 | 30 A @ 230 V AC | 265V AC | 4.33" | 1.4" | 4.08" | Integrated Heat Sink, LED Indicator, Recessed Terminals | 0000000 | 0000000 |
| 4 | __ | 4-20mA | 1 | 85-265V AC | 42A | 1 | 50 | 42 A @ 230 V AC | 265V AC | 4.33" | 1.4" | 4.08" | Integrated Heat Sink, LED Indicator, Recessed Terminals | 0000000 | 000000 |
| 9 | 0-10V DC | __ | 1 | 85-265V AC | 30A | 1 | 50 | 30 A @ 230 V AC | 265V AC | 4.33" | 1.4" | 4.08" | Integrated Heat Sink, LED Indicator, Recessed Terminals, Potentiometer Input | 0000000 | 000000 |
| 9 | 0-10V DC | __ | 1 | 85-265V AC | 42A | 1 | 50 | 42 A @ 230 V AC | 265V AC | 4.33" | 1.4" | 4.08" | Integrated Heat Sink, LED Indicator, Recessed Terminals, Potentiometer Input | 0000000 | 000000 |