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
PHP111.11
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. 820-0523
BrandRS PRO
PHP746.13
Each
units
DPDT On-On-On 5 A @ 250 V ac PCB Solder IP67 - - - - 18mm Brass - 10mΩ
RS Stock No. 222-897
Mfr. Part No.ET220K12-Z
PHP361.08
Each
units
DPST On-Off 12 A@ 250 V ac, 20 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 401-680
BrandRS PRO
PHP164.98
Each
units
DPDT Latching 5 A @ 250 V ac PCB Through Hole - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 350-248
Mfr. Part No.C1760HOAAF
PHP381.31
Each
units
Double Pole Double Throw (DPDT) Latching 16 A Panel Mount Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS Stock No. 350-226
Mfr. Part No.C1720HOAAG
PHP271.59
Each
units
Single Pole Double Throw (SPDT) On-Off-On 20 A @ 250 V ac Panel Mount Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS Stock No. 419-849
BrandRS PRO
PHP133.85
Each
units
Single Pole Single Throw (SPST) Latching 16 A @ 125 V ac Panel Mount Tab - Yes - - 20.2mm 16mm PC - 50mΩ
RS Stock No. 665-663
Mfr. Part No.639NH/2
BrandAPEM
PHP551.62
Each
units
SPDT On-Off-On 10 A @ 24 V dc Panel Mount Tab - - - - - 13.5mm Polyamide - 10mΩ
RS Stock No. 354-3061
Mfr. Part No.S-6A
PHP519.69
Each
units
Double Pole Double Throw (DPDT) Latching 20 A@ 125 V ac, 20 A@ 30 V dc Panel Mount Solder - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 401-692
BrandRS PRO
PHP164.98
Each
units
DPDT On-Off-On 5 A @ 28 V dc PCB Through Hole - - - - - 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 251-9253
Mfr. Part No.631H/2
BrandAPEM
PHP387.40
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. 394-465
BrandRS PRO
PHP216.02
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. 464-4777
Mfr. Part No.M-2042P
PHP709.71
Each
units
4PDT Latching 6 A@ 125 V ac PCB Through Hole - - - - - 12.28mm Brass - 10mΩ
RS Stock No. 344-710
Mfr. Part No.FTPA0904
PHP779.06
Each
units
Double Pole Double Throw (DPDT) On-On-On 4 A @ 30 V dc Panel Mount Solder - - - - 6.2mm 16.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 464-4749
Mfr. Part No.M-2032
PHP479.16
Each
units
3PDT Latching 3 A@ 30 V dc, 6 A@ 125 V ac PCB Through Hole IP67 - - - - - Chromium Plated Brass - 10mΩ
RS Stock No. 419-845
BrandRS PRO
PHP135.09
Each
units
SPST Latching 16 A @ 125 V ac Panel Mount Tab - Yes - - 20.2mm 16mm PC - 50mΩ
RS Stock No. 464-4660
Mfr. Part No.B-12EP
PHP224.90
Each
units
Single Pole Double Throw (SPDT) Latching 100 mA @ 28 V ac/dc PCB Through Hole - - - - - 10mm Brass - 50mΩ
RS Stock No. 350-204
Mfr. Part No.C1700HOAAG
PHP242.79
Each
units
SPST Latching 16 A @ 250 V ac Panel Mount Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS Stock No. 354-3235
Mfr. Part No.S-821
PHP1,428.70
Each
units
Double Pole Single Throw (DPST) Latching 30 A@ 250 V ac, 30 A@ 30 V dc Panel Mount Screw - - - - - 22mm Brass - 10mΩ
RS Stock No. 222-746
Mfr. Part No.ET210P12-Z
PHP367.30
Each
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DPDT On-Off-On 7 A@ 250 V ac, 10 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
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