Toggle Switches

Toggle switches are among the most basic and most common of all electronic components, the switch moves contacts that either provide a path for current to flow through or moves those contacts in such a way that the path is cut. The toggle switches most people will be familiar with are light switches.

How Does a Toggle Switch Function?
Toggle switches may vary a bit in function from one to the next depending upon their configurations. However, the basics are the same.
When the actuator (the toggle itself) is moved, the armature in the switch moves the contact into position either energizing the circuit or de-energizing it. Once the switch is moved from one position to the other, it typically stays that way. There are also momentary switches, which energize or de-energize a circuit for as long as they are actuated and then go back to their normal state once the actuator is released. This is accomplished via a spring mechanism that exerts a force on the armature from the inside.

Contact Configuration of a Toggle Switch
  • A single pole single throw (SPST) switch is the simplest and most common type of toggle switch. These switches allow simple on and off operation for a single circuit. Most light switches are SPST switches.
  • Single pole double throw (SPDT) switches can be used to change where a voltage is directed. The double throw means that the switch can be used to energize two different circuits - one at a time - from a single source of energy.
  • Double pole single throw (DPST) switches allow an operation that is very similar to having two SPST switches hooked together in one device. The switch can turn two circuits on and off. These are very convenient when more than one device needs to be controlled with the same switch.
  • Double pole double throw (DPDT) switches allow two different circuits to be served by the same pole. These are used in applications where a circuit may need to have changing voltages applied to connected devices.

There are also switches with the designation CO, such as SPCO (single pole changeover) switches. These have an off position in the middle of the switch and can be used to energize or de-energize two different circuits attached to the device.

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Description Price Contact Configuration Switch Operation Contact Current Rating Mounting Type Terminal Type IP Rating Illuminated Panel Cut Out Width Panel Cut Out Height Panel Cut Out Diameter Actuator Length Actuator Material Voltage Rating Contact Resistance
RS Stock No. 876-7534
Mfr. Part No.76HPSB08GWRT
BrandGrayhill
PHP191.237
Each (In a Pack of 500)
units
SPST - 150 mA PCB Surface Mount - - - - - - - 30V dc -
RS Stock No. 878-0350
Mfr. Part No.34ASP41B1M1QT
BrandGrayhill
PHP331.28
Each
units
SPDT (On)-Off-(On) 5 A Panel Mount Solder - - - - 6.35mm 10.41mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0379
Mfr. Part No.76PSB02ST
BrandGrayhill
PHP144.272
Each (In a Pack of 10)
units
SPST - 150 mA PCB Through Hole - - - - - - - 30V dc -
RS Stock No. 878-0366
Mfr. Part No.34CMSP12B2M6RT
BrandGrayhill
PHP406.99
Each
units
SPDT Latching 400 mA PCB Through Hole - - - - - 5.59mm Chrome Plated Brass 20V ac/dc 10mΩ
RS Stock No. 878-0372
Mfr. Part No.34BW3P12B4M7QT
BrandGrayhill
PHP982.07
Each
units
3PDT Latching 5 A PCB Through Hole IP67 - - - - 7.54mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0369
Mfr. Part No.34ASP12B1M2RT
BrandGrayhill
PHP399.21
Each
units
SPDT Latching 400 mA PCB Through Hole - - - - - 10.41mm Chrome Plated Brass 20V ac/dc 10mΩ
RS Stock No. 878-0341
Mfr. Part No.34ASP31B1M1QT
BrandGrayhill
PHP328.65
Each
units
SPDT On-Off-On 5 A Panel Mount Solder - - - - 6.35mm 10.41mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0363
Mfr. Part No.34ASP47T7M1QT
BrandGrayhill
PHP412.44
Each
units
SPDT (On)-Off-(On) 5 A Panel Mount Solder - - - - 11.91mm 10.41mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0385
Mfr. Part No.76PSB04ST
BrandGrayhill
PHP148.245
Each (In a Pack of 10)
units
SPST - 150 mA PCB Through Hole - - - - - - - 30V dc -
RS Stock No. 878-0381
Mfr. Part No.76STC04T
BrandGrayhill
PHP388.62
Each
units
SPDT - 150 mA PCB Through Hole - - - - - - - 30V dc -
RS Stock No. 878-0375
Mfr. Part No.34DWMSP15B4M6RT
BrandGrayhill
PHP421.78
Each
units
SPDT Latching 3 A PCB Through Hole IP67 - - - - 10.57mm Chrome Plated Brass 20V ac/dc 20mΩ
RS Stock No. 878-0335
Mfr. Part No.34ADP31B1M1QT
BrandGrayhill
PHP416.85
Each
units
DPDT On-Off-On 5 A Panel Mount Solder - - - - 6.35mm 10.41mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0331
Mfr. Part No.34ADP11B1M1QT
BrandGrayhill
PHP414.23
Each
units
DPDT Latching 5 A Panel Mount Solder - - - - 6.35mm 10.41mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0347
Mfr. Part No.34ASP11B1M1RT
BrandGrayhill
PHP373.53
Each
units
SPDT Latching 400 mA Panel Mount Solder - - - - 6.35mm 10.41mm Chrome Plated Brass 20V ac/dc 10mΩ
RS Stock No. 878-0353
Mfr. Part No.34ASP51B1M1QT
BrandGrayhill
PHP343.88
Each
units
SPDT On-Off-(On) 5 A Panel Mount Solder - - - - 6.35mm 10.41mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ
RS Stock No. 878-0388
Mfr. Part No.76PSB06ST
BrandGrayhill
PHP211.978
Each (In a Pack of 10)
units
SPST - 150 mA PCB Through Hole - - - - - - - 30V dc -
RS Stock No. 878-0357
Mfr. Part No.34CMSP11B1M1QT
BrandGrayhill
PHP372.75
Each
units
SPDT Latching 3 A Panel Mount Solder - - - - 4.95mm 5.59mm Chrome Plated Brass 28 V dc, 250 V ac 10mΩ