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. 453-7900
Mfr. Part No.TL-22H1DKMMS1
HK$103.27
Each
units
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. 401-703
BrandRS PRO
HK$15.61
Each
units
SPDT Latching 5 A @ 250 V ac PCB Through Hole - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 174-4127
Mfr. Part No.11 17201 30
BrandEOZ
HK$523.69
Each
units
Single Pole Double Throw (SPDT) Latching 4.5 A @ 12 V dc Panel Mount Solder Lug IP67 - - - - 10mm - 48 V dc, 220 V ac -
RS Stock No. 394-459
BrandRS PRO
HK$21.54
Each
units
SPDT Latching 5 A @ 250 V ac Panel Mount Solder - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 819-9300
Mfr. Part No.MTL 106 D
HK$83.57
Each
units
Single Pole Double Throw (SPDT) Latching 4 A @ 30 V dc Panel Mount Solder Tag - - - - 6.2mm 15mm - - <10mΩ
RS Stock No. 190-0642
Mfr. Part No.5636A
BrandAPEM
HK$43.65
Each
units
Single Pole Single Throw (SPST) Latching 4 A @ 30 V dc Panel Mount Solder - - - - - - Brass - 10mΩ
RS Stock No. 283-8992
Mfr. Part No.7201J91ZQE22
BrandC & K
HK$51.51
Each
units
Double Pole Double Throw (DPDT) Latching 5 A @ 28 V dc Panel Mount Solder - - - - - - Nylon - 10mΩ
RS Stock No. 251-9253
Mfr. Part No.631H/2
BrandAPEM
HK$38.45
Each
units
Single Pole Single Throw (SPST) Latching 10 A@ 24 V dc Panel Mount Solder, Tab - - - - - 17.5mm Nickel Plated Brass - 10mΩ
RS Stock No. 354-3207
Mfr. Part No.S-333T
HK$93.48
Each
units
Double Pole Double Throw (DPDT) On-Off-On 15 A@ 250 V ac, 15 A@ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 354-2973
Mfr. Part No.S-114
HK$36.03
Each
units
Double Pole Single Throw (DPST) Latching 5 A@ 125 V ac, 5 A@ 30 V dc Panel Mount Solder - - - - - 18mm Brass - 10mΩ
RS Stock No. 164-8695
Mfr. Part No.AWTN1504
HK$143.21
Each (In a Box of 100)
units
Double Pole Double Throw (DPDT) Latching 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 317-437
Mfr. Part No.AWTN1504
HK$118.19
Each
units
DPDT Latching 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 448-0753
BrandRS PRO
HK$19.046
Each (In a Pack of 5)
units
Single Pole Double Throw (SPDT) On-Off-On 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Brass - 10mΩ
RS Stock No. 448-0747
BrandRS PRO
HK$14.434
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. 734-7154
BrandRS PRO
HK$16.29
Each
units
Single Pole Single Throw (SPST) Latching 5 A @ 28 V dc Panel Mount Solder - - 6.86mm 12.7mm - 10.4mm Chrome Plated Brass 28V dc 10mΩ
RS Stock No. 401-670
BrandRS PRO
HK$18.86
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. 762-4707
Mfr. Part No.8A1012-Z
HK$24.35
Each
units
Single Pole Double Throw (SPDT) Latching 6 A PCB Through Hole - - - - - 10.5mm - - 10mΩ
RS Stock No. 518-5314
Mfr. Part No.Y12CP
BrandAPEM
HK$66.86
Each
units
Double Pole Single Throw (DPST) Latching 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 401-686
BrandRS PRO
HK$21.67
Each
units
SPDT Latching 400 mA @ 20 V PCB Through Hole IP67 - - - - 6.1mm Brass - 20mΩ
RS Stock No. 394-425
BrandRS PRO
HK$28.31
Each
units
Double Pole Double Throw (DPDT) On-Off-On 5 A @ 250 V ac Panel Mount Solder - - - - - 12.3mm Brass - 10mΩ
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