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. 2508750595
Mfr. Part No.8370K107
BrandEaton
£11.98
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RS Stock No. 2508747448
Mfr. Part No.7500K14
BrandEaton
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RS Stock No. 2508808234
Mfr. Part No.8501K17
BrandEaton
£35.93
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RS Stock No. 2509021292
Mfr. Part No.7810K2
BrandEaton
£74.93
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RS Stock No. 2508747369
Mfr. Part No.7300K38
BrandEaton
£11.80
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RS Stock No. 2508808442
Mfr. Part No.8500K4
BrandEaton
£18.12
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RS Stock No. 2508808161
Mfr. Part No.8500K11
BrandEaton
£21.19
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RS Stock No. 2508808290
Mfr. Part No.8504K6
BrandEaton
£47.55
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RS Stock No. 2508808284
Mfr. Part No.8504K65
BrandEaton
£58.50
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RS Stock No. 2508747460
Mfr. Part No.7501K15
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£3.58
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RS Stock No. 2508748069
Mfr. Part No.7590K4
BrandEaton
£5.54
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RS Stock No. 2508808470
Mfr. Part No.8501K9
BrandEaton
£27.11
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RS Stock No. 2508808436
Mfr. Part No.8500K2
BrandEaton
£16.63
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RS Stock No. 2508747561
Mfr. Part No.7565K7
BrandEaton
£6.81
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Mfr. Part No.8500K1
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£22.65
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RS Stock No. 2508808492
Mfr. Part No.8501K4
BrandEaton
£26.62
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Mfr. Part No.7580K7
BrandEaton
£3.74
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RS Stock No. 2508750696
Mfr. Part No.8801K22
BrandEaton
£17.06
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RS Stock No. 2508808177
Mfr. Part No.8500K3
BrandEaton
£20.63
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RS Stock No. 2508747505
Mfr. Part No.7560K5
BrandEaton
£6.81
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