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. 394-419
BrandRS PRO
MYR19.99
Each
units
DPDT Latching 5 A @ 250 V ac Panel Mount Solder - - - - - 12.3mm Brass - 10mΩ
RS Stock No. 448-0804
BrandRS PRO
MYR22.72
Each
units
Single Pole Double Throw (SPDT) On-Off-On 400 mA @ 20 V PCB Through Hole - - - - - 5.33mm Chrome Plated Brass - 20mΩ
RS Stock No. 135-4437
Mfr. Part No.AWTS1504
MYR88.61
Each (In a Box of 100)
units
DPDT (On)-Off-(On) 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 222-819
Mfr. Part No.ET115A12-Z
MYR27.77
Each
units
SPST On-Off 10 A@ 250 V ac, 15 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 861-0292
Mfr. Part No.C3960BBAAA
MYR26.97
Each
units
DPDT Latching 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS Stock No. 741-1000
Mfr. Part No.1821.6101
BrandMarquardt
MYR19.43
Each
units
Single Pole Single Throw (SPST) Latching 6 A @ 250 V ac Panel Mount Solder IP40 - - - - 14mm Polyamide - 100mΩ
RS Stock No. 711-0006
Mfr. Part No.1-1825139-8
MYR24.65
Each
units
Double Pole Double Throw (DPDT) (On)-Off-(On) 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Phenolic - 10mΩ
RS Stock No. 222-897
Mfr. Part No.ET220K12-Z
MYR33.84
Each
units
DPST On-Off 12 A@ 250 V ac, 20 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 164-8731
Mfr. Part No.FTN7904
MYR62.481
Each (In a Box of 100)
units
DPDT Latching 6 A @ 250 V ac Panel Mount Solder - - - - 6.2mm 11.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 910-8119
Mfr. Part No.647H/2
BrandAPEM
MYR47.05
Each
units
DPDT (On)-Off-(On) 10 A Panel Mount Solder - - - - 12.2mm 17.5mm Nickel Plated Brass 400V ac 10mΩ
RS Stock No. 164-8695
Mfr. Part No.AWTN1504
MYR107.81
Each (In a Box of 100)
units
DPDT Latching 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 317-645
Mfr. Part No.FTD7904
MYR52.38
Each
units
Single Pole Double Throw (SPDT) Latching 6 A @ 250 V ac Panel Mount Solder - - - - 6.2mm 21.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 448-1059
BrandRS PRO
MYR33.49
Each
units
Single Pole Double Throw (SPDT) Latching 3 A @ 28 V dc Panel Mount Solder - - - - - 9.4mm Brass - 20mΩ
RS Stock No. 401-692
BrandRS PRO
MYR15.10
Each
units
DPDT On-Off-On 5 A @ 28 V dc PCB Through Hole - - - - - 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 135-4445
Mfr. Part No.AWTD1504
MYR84.497
Each (In a Box of 100)
units
SPDT Latching 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 320-938
Mfr. Part No.5646A9
BrandAPEM
MYR40.86
Each
units
Double Pole Double Throw (DPDT) Latching 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 317-651
Mfr. Part No.FTN7904
MYR75.10
Each
units
Double Pole Double Throw (DPDT) Latching 6 A @ 250 V ac Panel Mount Solder - - - - 6.2mm 11.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 174-4155
Mfr. Part No.01 17001 21
BrandEOZ
MYR123.20
Each
units
Single Pole Double Throw (SPDT) Latching 4.5 A @ 12 V dc Panel Mount Solder - - - - - 10.9mm - - 10mΩ
RS Stock No. 394-425
BrandRS PRO
MYR15.43
Each
units
Double Pole Double Throw (DPDT) On-Off-On 5 A @ 250 V ac Panel Mount Solder - - - - - 12.3mm Brass - 10mΩ
RS Stock No. 161-8524
Mfr. Part No.1-1825139-7
MYR15.381
Each (In a Bag of 100)
units
DPDT (On)-Off-(On) 5 A @ 28 V dc PCB Through Hole - - - - 6.35mm 10.41mm Phenolic - 10mΩ