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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RS Stock No. 2508748413
Mfr. Part No.7805K33
BrandEaton
HK$266.42
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RS Stock No. 2508748069
Mfr. Part No.7590K4
BrandEaton
HK$61.60
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RS Stock No. 2508750630
Mfr. Part No.8396K107
BrandEaton
HK$122.92
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RS Stock No. 2508747369
Mfr. Part No.7300K38
BrandEaton
HK$140.56
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RS Stock No. 2508750769
Mfr. Part No.8834K5
BrandEaton
HK$422.24
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RS Stock No. 2508748075
Mfr. Part No.7590K6
BrandEaton
HK$59.36
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RS Stock No. 2508750775
Mfr. Part No.7306K38
BrandEaton
HK$199.78
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RS Stock No. 2508748081
Mfr. Part No.7591K4
BrandEaton
HK$92.54
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RS Stock No. 2508808357
Mfr. Part No.8532K9
BrandEaton
HK$516.88
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RS Stock No. 2508750781
Mfr. Part No.7305K38
BrandEaton
HK$199.78
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RS Stock No. 2508808177
Mfr. Part No.8500K3
BrandEaton
HK$275.10
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RS Stock No. 2508750696
Mfr. Part No.8801K22
BrandEaton
HK$203.14
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RS Stock No. 2508808155
Mfr. Part No.8500K10
BrandEaton
HK$275.10
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RS Stock No. 2508808385
Mfr. Part No.8502K2
BrandEaton
HK$611.52
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RS Stock No. 2509171066
Mfr. Part No.7664K5
BrandEaton
HK$665.84
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RS Stock No. 2508808458
Mfr. Part No.8501K1
BrandEaton
HK$361.48
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Mfr. Part No.8500K1
BrandEaton
HK$269.64
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RS Stock No. 2508748334
Mfr. Part No.7803K31
BrandEaton
HK$82.18
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RS Stock No. 2508748132
Mfr. Part No.7592K6
BrandEaton
HK$64.40
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RS Stock No. 2508811779
Mfr. Part No.8531K5
BrandEaton
HK$296.66
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