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. 320-966
Mfr. Part No.5642A9
BrandAPEM
PHP862.26
Each
units
Double Pole Double Throw (DPDT) On-(On) 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 222-819
Mfr. Part No.ET115A12-Z
PHP267.63
Each
units
SPST On-Off 10 A@ 250 V ac, 15 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 419-855
BrandRS PRO
PHP126.93
Each
units
Single Pole Single Throw (SPST) Latching 16 A @ 125 V ac Panel Mount Tab - Yes - - 20.2mm 16mm PC 250V 50mΩ
RS Stock No. 124-5930
Mfr. Part No.M2018WBW01
PHP639.37
Each
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SPDT (On)-Off-(On) 3 A @ 30 V dc, 6 A @ 125 V ac PCB Solder IP67 - - - 12.5mm 20mm Chrome Plated 30 V dc, 250 V ac 10mΩ
RS Stock No. 354-3112
Mfr. Part No.S-1AW
PHP602.49
Each
units
- - - - Solder - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 317-184
Mfr. Part No.FTT0904
PHP704.35
Each
units
Double Pole Double Throw (DPDT) On-Off-(On) 6 A @ 250 V ac Panel Mount Solder - - - - 6.2mm 10.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 401-670
BrandRS PRO
PHP159.62
Each
units
Single Pole Double Throw (SPDT) On-Off-On 5 A @ 250 V ac PCB Through Hole - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 320-922
Mfr. Part No.5639A9
BrandAPEM
PHP575.19
Each
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SP On-Off-On 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 453-7938
Mfr. Part No.TL-22H1DKYYS1
PHP702.57
Each
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Double Pole Double Throw (DPDT) Latching 3 A @ 250 V ac Panel Mount Solder IP65 Yes - - 12.5mm 17.5mm PC - 10mΩ
RS Stock No. 448-0775
BrandRS PRO
PHP224.628
Each (In a Pack of 5)
units
Double Pole Double Throw (DPDT) On-Off-On 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 401-703
BrandRS PRO
PHP120.62
Each
units
SPDT Latching 5 A @ 250 V ac PCB Through Hole - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 222-831
Mfr. Part No.ET115E12-Z
PHP419.95
Each
units
SPDT On-Off-On 10 A@ 250 V ac, 15 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 320-916
Mfr. Part No.5636A9
BrandAPEM
PHP580.02
Each
units
SP On-On 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 163-8526
Mfr. Part No.FTT0904
PHP639.808
Each (In a Box of 100)
units
DPDT On-Off-(On) 6 A @ 250 V ac Panel Mount Solder - - - - 6.2mm 10.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 881-1390
Mfr. Part No.HM251-73
PHP886.71
Each
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3PDT On-Off-On 15 A Panel Mount Tab - - - - 12.7mm 17.44mm Brass 250V ac -
RS Stock No. 665-657
Mfr. Part No.631NH/2
BrandApem
PHP375.38
Each
units
SP On-Off 10 A @ 24 V dc Panel Mount Tab - - - - - 13.5mm Polyamide - 10mΩ
RS Stock No. 199-0926
Mfr. Part No.MTA 106 H
PHP622.82
Each
units
Single Pole Double Throw (SPDT) On-Off-(On) 4 A @ 30 V dc Panel Mount Solder - - - - - 10.5mm - - 10mΩ
RS Stock No. 518-5291
Mfr. Part No.X12CP
BrandAPEM
PHP496.31
Each
units
Single Pole Single Throw (SPST) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 842-4760
Mfr. Part No.2TL1-50
BrandHoneywell
PHP3,186.33
Each
units
DPDT On-On-(On) 6 A @ 230 V ac, 11 A @ 115 V ac, 18 A @ 28 V dc Panel Mount Screw - - - - - 17mm Metal, Plastic - -
RS Stock No. 317-847
Mfr. Part No.AWTP1504
PHP2,276.89
Each
units
Double Pole Double Throw (DPDT) On-Off-On 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ