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. 417-5451
Mfr. Part No.3631NF/2
BrandAPEM
HK$149.00
Each
units
Single Pole Single Throw (SPST) Latching 12 A Panel Mount Solder, Tab IP67 - - - - 17.5mm Brass 28V dc 10mΩ
RS Stock No. 741-1006
Mfr. Part No.1821.1101
BrandMarquardt
HK$30.81
Each
units
Single Pole Single Throw (SPST) Latching 6 A @ 250 V ac - Tab IP40 - - - - 14mm Polyamide - 100mΩ
RS Stock No. 306-4849
Mfr. Part No.631H/2-1V
BrandAPEM
HK$130.52
Each
units
Single Pole Single Throw (SPST) Latching 10 A @ 24 V dc Panel Mount Solder, Tab - - - - - 19.4mm Nickel Plated Brass - 10mΩ
RS Stock No. 448-1009
BrandRS PRO
HK$32.47
Each
units
Single Pole Double Throw (SPDT) Latching 400 mA @ 20 V PCB Through Hole - - - - - 7.37mm Brass - 20mΩ
RS Stock No. 419-845
BrandRS PRO
HK$17.04
Each
units
SPST Latching 16 A @ 125 V ac Panel Mount Tab - Yes - - 20.2mm 16mm PC - 50mΩ
RS Stock No. 317-077
Mfr. Part No.FTD09G04
HK$64.78
Each
units
Single Pole Double Throw (SPDT) Latching 14 mA @ 28 V dc Panel Mount Through Hole - - - - 6.2mm 16.5mm Chrome Plated Brass - 20mΩ
RS Stock No. 734-7097
BrandRS PRO
HK$15.20
Each
units
Single Pole Double Throw (SPDT) Latching 5 A @ 250 V ac Panel Mount Solder - - - - 6.35mm 5.08mm Chromium Plated Brass - 10mΩ
RS Stock No. 419-855
BrandRS PRO
HK$11.64
Each
units
Single Pole Single Throw (SPST) Latching 16 A @ 125 V ac Panel Mount Tab - Yes - - 20.2mm 16mm PC 250V 50mΩ
RS Stock No. 417-5473
Mfr. Part No.3641NF/2
BrandAPEM
HK$161.94
Each
units
Double Pole Single Throw (DPST) Latching 12 A Panel Mount Solder, Tab IP67 - - - - 17.5mm Brass 28V dc 10mΩ
RS Stock No. 199-0954
Mfr. Part No.MTA206P
HK$68.73
Each
units
Double Pole Double Throw (DPDT) On-Off-On 4 A @ 30 V dc Panel Mount Solder - - - - - 10.5mm - - 10mΩ
RS Stock No. 394-431
BrandRS PRO
HK$59.78
Each
units
Double Pole Double Throw (DPDT) Latching 5 A @ 28 V dc Panel Mount Solder - - - - 11.91mm 17.56mm Chromium Plated Brass - 10mΩ
RS Stock No. 317-005
Mfr. Part No.FTE0904
HK$45.29
Each
units
Single Pole Double Throw (SPDT) On-Off-On 4 A @ 30 V dc Panel Mount Through Hole - - - - 6.2mm 10.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 350-232
Mfr. Part No.C1750HOAAI
HK$46.87
Each
units
Double Pole Single Throw (DPST) Latching 20 A @ 250 V ac Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS Stock No. 762-5246
Mfr. Part No.ATE2P-6M3-10-Z
HK$32.94
Each
units
Double Pole Double Throw (DPDT) On-Off-On 50 mA@ 48 V ac/dc PCB Right Angle Through Hole - - - - - 6mm - - 50mΩ
RS Stock No. 879-8332
Mfr. Part No.2M1-SP1-T1-B1-M2QE
HK$19.85
Each
units
Single Pole Single Throw (SPST) Latching 5 A Panel Mount Pc Pin - - - - 6.35 (1/4 Bushing) mm, 11.91 (15/32 Bushing) mm 10.4mm Brass 250V ac 10mΩ
RS Stock No. 734-7123
BrandRS PRO
HK$19.57
Each
units
Single Pole Double Throw (SPDT) On-Off-On 5 A @ 250 V ac Panel Mount Solder - - - - 6.35mm 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 823-5119
Mfr. Part No.01818.1102-00
BrandMarquardt
HK$42.86
Each
units
Single Pole Double Throw (SPDT) (On)-Off-On 6 A @ 250 V ac Panel Mount Quick Connect IP40 - 18.5mm 13.2mm - 14mm PA - <100mΩ
RS Stock No. 316-989
Mfr. Part No.FTN0904
HK$54.04
Each
units
DPDT Latching 4 A @ 30 V dc Panel Mount Through Hole - - - - 6.2mm 10.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 377-9658
Mfr. Part No.5638A
BrandAPEM
HK$26.27
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$42.44
Each
units
Single Pole Single Throw (SPST) (On)-Off-On 4 A @ 30 V dc Panel Mount Solder - - - - - 11.4mm Brass - 10mΩ
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