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. 448-0747
BrandRS PRO
SGD3.05
Each (In a Pack of 5)
units
Single Pole Double Throw (SPDT) Latching 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 350-204
Mfr. Part No.C1700HOAAG
SGD7.41
Each
units
SPST Latching 16 A @ 250 V ac Panel Mount Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS Stock No. 518-5308
Mfr. Part No.X32CP
BrandAPEM
SGD12.06
Each
units
Single Pole Double Throw (SPDT) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 316-973
Mfr. Part No.FTD0904
SGD14.74
Each
units
SPDT Latching 4 A @ 30 V dc Panel Mount Solder - - - - 6.2mm 11.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 306-4849
Mfr. Part No.631H/2-1V
BrandAPEM
SGD37.44
Each
units
Single Pole Single Throw (SPST) Latching 10 A @ 24 V dc Panel Mount Tab - - - - - 19.4mm Nickel Plated Brass - 10mΩ
RS Stock No. 251-9253
Mfr. Part No.631H/2
BrandAPEM
SGD11.43
Each
units
Single Pole Single Throw (SPST) Latching 10 A@ 24 V dc Panel Mount Tab - - - - - 17.5mm Nickel Plated Brass - 10mΩ
RS Stock No. 710-9876
Mfr. Part No.3-1825139-9
SGD11.64
Each
units
DP3T On-On-On 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Phenolic - 10mΩ
RS Stock No. 518-5336
Mfr. Part No.Y32CP
BrandAPEM
SGD20.72
Each
units
Double Pole Double Throw (DPDT) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 448-0769
BrandRS PRO
SGD3.766
Each (In a Pack of 5)
units
Double Pole Double Throw (DPDT) Latching 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Brass - 10mΩ
RS Stock No. 401-703
BrandRS PRO
SGD3.27
Each
units
SPDT Latching 5 A @ 250 V ac PCB Through Hole - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 103-5518
Mfr. Part No.5647A9
BrandAPEM
SGD27.11
Each
units
Double Pole Single Throw (DPST) (On)-Off-(On) 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 518-5291
Mfr. Part No.X12CP
BrandAPEM
SGD11.33
Each
units
Single Pole Single Throw (SPST) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 394-465
BrandRS PRO
SGD5.93
Each
units
Single Pole Double Throw (SPDT) On-Off-On 5 A @ 250 V ac Panel Mount Solder - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 350-254
Mfr. Part No.C1770HOAAF
SGD8.96
Each
units
Double Pole Double Throw (DPDT) On-Off-On 20 A @ 250 V ac Panel Mount Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS Stock No. 518-5320
Mfr. Part No.Y22CP
BrandAPEM
SGD18.70
Each
units
Double Pole Double Throw (DPDT) On-(On) 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 842-5044
Mfr. Part No.61NT1-2
BrandHoneywell
SGD53.02
Each
units
SPST Latching 6 A @ 230 V ac, 15 A @ 115 V ac, 20 A @ 28 V dc Panel Mount Screw IP67, IP68 - - - 12.4mm 17mm Metal, Plastic - -
RS Stock No. 354-3156
Mfr. Part No.S-301T
SGD9.94
Each
units
Single Pole Single Throw (SPST) Latching 6 A @ 250 V ac, 20 A @ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 354-3184
Mfr. Part No.S-331T
SGD15.87
Each
units
Double Pole Single Throw (DPST) Latching 15 A@ 250 V ac, 15 A@ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 861-0295
Mfr. Part No.C3922BAAAA
SGD10.88
Each
units
SPDT (On)-Off-(On) 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS Stock No. 394-421
BrandRS PRO
SGD8.53
Each
units
Double Pole Double Throw (DPDT) On-Off-On 5 A @ 250 V ac Panel Mount Solder - - - - - 10.41mm Brass - 10mΩ