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. 190-0642
Mfr. Part No.5636A
BrandAPEM
HK$46.00
Each
units
Single Pole Single Throw (SPST) Latching 4 A @ 30 V dc Panel Mount Solder - - - - - - Brass - 10mΩ
RS Stock No. 251-9253
Mfr. Part No.631H/2
BrandAPEM
HK$52.87
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. 518-5314
Mfr. Part No.Y12CP
BrandAPEM
HK$89.12
Each
units
Double Pole Single Throw (DPST) On-(Off) 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 320-922
Mfr. Part No.5639A9
BrandAPEM
HK$73.74
Each
units
SP 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
HK$69.87
Each
units
Single Pole Single Throw (SPST) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 692-5223
Mfr. Part No.5646ADBK2V
BrandAPEM
HK$157.67
Each
units
Double Pole Double Throw (DPDT) Latching 4 A @ 30 V dc Panel Mount Solder - - - - 6.5mm 14.75mm Nickel Plated Brass - 10mΩ
RS Stock No. 692-5214
Mfr. Part No.5659CDB
BrandAPEM
HK$106.64
Each
units
3-pole on-off switch On-Off-On 400 mA @ 20 V Panel Mount Solder - - - - - - Brass - 10mΩ
RS Stock No. 316-917
Mfr. Part No.21136NA
BrandAPEM
HK$99.28
Each
units
SP On-On 4 A @ 30 V dc PCB Through Hole - - - - - 11.5mm Brass - 20mΩ
RS Stock No. 320-938
Mfr. Part No.5646A9
BrandAPEM
HK$88.09
Each
units
Double Pole Double Throw (DPDT) Latching 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 377-9642
Mfr. Part No.5637A
BrandAPEM
HK$54.82
Each
units
Single Pole Single Throw (SPST) (On)-Off-(On) 4 A @ 30 V dc Panel Mount Solder - - - - - - Brass - 10mΩ
RS Stock No. 103-5502
Mfr. Part No.5638A9
BrandAPEM
HK$119.13
Each
units
Single Pole Single Throw (SPST) On-Off-(On) 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 377-9658
Mfr. Part No.5638A
BrandAPEM
HK$26.75
Each
units
Single Pole Single Throw (SPST) On-Off-(On) 4 A @ 30 V dc Panel Mount Solder - - - - - - Brass - 10mΩ
RS Stock No. 518-5336
Mfr. Part No.Y32CP
BrandAPEM
HK$120.94
Each
units
Double Pole Double Throw (DPDT) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 306-4849
Mfr. Part No.631H/2-1V
BrandAPEM
HK$204.68
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. 417-5451
Mfr. Part No.3631NF/2
BrandAPEM
HK$211.42
Each
units
Single Pole Single Throw (SPST) Latching 12 A Panel Mount Tab IP67 - - - - 17.5mm Brass 28V dc 10mΩ
RS Stock No. 417-5473
Mfr. Part No.3641NF/2
BrandAPEM
HK$191.37
Each
units
Double Pole Single Throw (DPST) Latching 12 A Panel Mount Tab IP67 - - - - 17.5mm Brass 28V dc 10mΩ
RS Stock No. 320-916
Mfr. Part No.5636A9
BrandAPEM
HK$76.71
Each
units
SP On-On 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
RS Stock No. 692-5239
Mfr. Part No.5659ADBK3V
BrandAPEM
HK$197.10
Each
units
Three Pole Double Throw (3PDT) On-Off-On 4 A @ 30 V dc Panel Mount Solder - - - - 6.5mm 15.1mm Nickel Plated Brass - 10mΩ
RS Stock No. 266-1534
Mfr. Part No.641H/2
BrandAPEM
HK$66.46
Each
units
Double Pole Single Throw (DPST) Latching 10 A@ 24 V dc Panel Mount Tab - - - - - 17.5mm Nickel Plated Brass - 10mΩ
RS Stock No. 910-8071
Mfr. Part No.641H
BrandAPEM
HK$86.79
Each
units
DPST Latching 15 A Panel Mount Screw - - - - 12.2mm 17.5mm Nickel Plated Brass 400V ac 10mΩ