Choosing an Electrical Switch
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Keyboard Push-Button Switches
Also known as tactile switches, these are small enough to fit inside a computer keyboard.
Covers (sold separately) fit over projecting button switches.
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 | Actuator Color | Switching Current @ Voltage | Max. Voltage  | Initial Contact Resistance, mOhm | Ht. | Wd. | Dp. | For Panel Cutout Dia. | For Panel Cutout Dia. | Each | |
Plastic Actuator with Solder Connection | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flush | |||||||||||||||
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 4 | SPST-NO | Ivory | 50 mA @ 24 V DC | 24V DC | 100 | 0.17" | 0.24" | 0.24" | 3.5 mm | 0.16" | 0000000 | 00000 |
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 4 | SPST-NO | Orange | 50 mA @ 24 V DC | 24V DC | 100 | 0.17" | 0.24" | 0.24" | 3.5 mm | 0.16" | 0000000 | 000 |
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 4 | SPST-NO | Red | 50 mA @ 24 V DC | 24V DC | 100 | 0.17" | 0.24" | 0.24" | 3.5 mm | 0.16" | 0000000 | 000 |
Projecting | |||||||||||||||
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 4 | SPST-NO | Yellow | 50 mA @ 24 V DC | 24V DC | 100 | 0.29" | 0.24" | 0.24" | 3.5 mm | 0.16" | 0000000 | 000 |
Grounded Plastic Actuator with Solder Connection | |||||||||||||||
Flush | |||||||||||||||
| 1 | 1 Off (Normally Open) | Springs Back (Momentary) | 5 | SPST-NO | Yellow | 50 mA @ 24 V DC | 24V DC | 100 | 0.17" | 0.24" | 0.24" | 3.5 mm | 0.16" | 0000000 | 000 |
Ultra-Precision Wet-Location Limit Switches
These switches actuate with the slightest push for a high degree of accuracy. All are rated IP67 for protection from wet locations and temporary submersion. They’re often used for determining manufacturing tolerances and detecting minute expansions and contractions.
For technical drawings and 3-D models, click on a part number.
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Operating Temp. Range, °F | Actuator Ht., mm | Wire Connection Type | No. of Wire Leads | Cable Lead Lg., ft. | Housing Ht., mm | Housing Material | Actuator Material | Mounting Thread Size | Each | |
| 1 | 1 On (Normally Closed) | Springs Back (Momentary) | SPST-NC | 50 mA @ 24 V AC, 2 mA @ 15 V DC | 24V AC 15V DC | -4° to 167° | 4 | Wire Leads | 2 | 2.5 | 21 | Nickel-Plated Brass | Ruby | M8 | 0000000 | 0000000 |
Ultra-Precision Limit Switches
These switches actuate with the slightest push for a high degree of accuracy. They’re often used for determining manufacturing tolerances and detecting minute expansions and contractions.
For technical drawings and 3-D models, click on a part number.
| No. of Circuits Controlled | Switch Starting Position | Switch Action | Industry Designation | Switching Current @ Voltage | Max. Voltage | Operating Temp. Range, °F | Actuator Ht., mm | Wire Connection Type | No. of Wire Leads | Cable Lead Lg., ft. | Housing Ht., mm | Housing Material | Actuator Material | Mounting Thread Size | Environmental Rating | Each | |
| 1 | 1 On (Normally Closed) | Springs Back (Momentary) | SPST-NC | 50 mA @ 24 V AC, 2 mA @ 15 V DC | 24V AC 15V DC | -4° to 167° | 11.5 | Wire Leads | 2 | 2 1/2 | 10 | Nickel-Plated Brass | Zirconium Ceramic | M8 | IP50 | 0000000 | 0000000 |
Magnetic Contact Alarm Switches
Wire contacts to an alarm system to alert when doors or windows are opened. Mount the magnet to the door or window and mount the switch to the frame. The alarm will activate when the magnet is pulled away by the opening door or window.
| Style | No. of Circuits Controlled | Switch Starting Position | Industry Designation | Switching Current @ Voltage | Max. Sensing Distance | Wire Lead Lg., ft. | Dia. | Lg. | Each | |
Nickel-Plated Brass Housing with Wire Leads | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Press Fit with Sealed Housing | ||||||||||
| C | 1 | 1 Off (Normally Open) | SPST-NO | 0.05 A @ 130 V DC | 0.68" | 1 | 0.38" | 0.62" | 00000000 | 000000 |