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. 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. 734-7198
BrandRS PRO
HK$19.76
Each
units
Double Pole Double Throw (DPDT) Latching 3 A @ 120 V ac PCB Through Hole - - - - 4.95mm 7.37mm Chromium Plated Brass - 20mΩ
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. 575-523
Mfr. Part No.0320.0302
BrandMarquardt
HK$301.49
Each
units
2 NO On-Off 16 A @ 250 V ac Panel Mount Screw - - - - - 27mm Polyamide - -
RS Stock No. 354-2721
Mfr. Part No.G-12AP
HK$28.58
Each
units
Single Pole Double Throw (SPDT) Latching 100 mA @ 28 V ac/dc PCB Through Hole - - - - - 3.8mm Glass Fibre Reinforced PA - 80mΩ
RS Stock No. 164-8732
Mfr. Part No.FTS0904
HK$68.503
Each (In a Box of 100)
units
Double Pole Double Throw (DPDT) (On)-Off-(On) 6 A @ 250 V ac Panel Mount Through Hole - - - - 6.2mm 10.5mm Chrome Plated Brass - 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. 317-825
Mfr. Part No.AWTE1504
HK$332.70
Each
units
Single Pole Double Throw (SPDT) On-Off-On 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 762-5457
Mfr. Part No.ET230N10-Z
HK$72.45
Each
units
Double Pole Double Throw (DPDT) Latching 25 A@ 250 V ac, 30 A@ 125 V ac Panel Mount Screw - - - - - 17mm - - 20mΩ
RS Stock No. 190-0636
Mfr. Part No.5649A.3V
BrandAPEM
HK$84.39
Each
units
Double Pole Double Throw (DPDT) On-Off-On 4 A @ 30 V dc Panel Mount Solder - - - - 6.5mm 15.1mm Nickel Plated Brass - 10mΩ
RS Stock No. 783-1139
Mfr. Part No.TT41NGPC9T1/4
HK$263.23
Each
units
Four Pole Double Throw (4PDT) Latching 3 A @ 125 V ac PCB PCB - - - - 0.043in - - - -
RS Stock No. 317-831
Mfr. Part No.AWTR1504
HK$228.10
Each
units
Double Pole Double Throw (DPDT) (On)-On 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 377-9636
Mfr. Part No.5632A
BrandAPEM
HK$32.83
Each
units
Single Pole Single Throw (SPST) (On)-On 4 A @ 30 V dc Panel Mount Solder - - - - - - Brass - 10mΩ
RS Stock No. 879-8351
Mfr. Part No.2M1-SP3-T1-B1-M1QE
HK$36.45
Each
units
Single Pole Single Throw (SPST) On-Off-On 5 A Panel Mount Solder Lug - - - - 6.35 (1/4 Bushing) mm, 11.91 (15/32 Bushing) mm 10.4mm Brass 250V ac 10mΩ
RS Stock No. 354-2670
Mfr. Part No.B-13AH
HK$34.06
Each
units
Single Pole Double Throw (SPDT) On-Off-On 100 mA @ 28 V ac/dc Panel Mount, PCB Through Hole - Yes - - - 10mm Brass - 50mΩ
RS Stock No. 734-7072
BrandRS PRO
HK$15.70
Each
units
Single Pole Double Throw (SPDT) Latching 5 A @ 250 V ac PCB Through Hole - - - - 6.35mm 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 317-588
Mfr. Part No.FTN59G04
HK$153.25
Each
units
Double Pole Double Throw (DPDT) Latching 400 mA @ 20 V Panel Mount Solder - - - - 6.2mm 10.5mm Brass - 10mΩ
RS Stock No. 222-588
Mfr. Part No.ATE1E-5M3-10-Z
HK$18.40
Each
units
SPDT On-Off-On 50 mA@ 48 V ac/dc PCB Through Hole - - - - - 6mm - - 50mΩ
RS Stock No. 317-673
Mfr. Part No.FTP7904
BrandBinder
HK$102.58
Each
units
Double Pole Double Throw (DPDT) On-Off-On 6 A @ 250 V ac Panel Mount Through Hole - - - - 6.2mm 11.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 842-4808
Mfr. Part No.2TL1-7
BrandHoneywell
HK$246.82
Each
units
Double Pole Double Throw (DPDT) (On)-Off-(On) 6 A @ 230 V ac, 11 A @ 115 V ac, 18 A @ 28 V dc Panel Mount Screw - - - - - 17mm Metal, Plastic - -