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. 401-709
BrandRS PRO
TWD94.00
Each
units
Single Pole Double Throw (SPDT) Latching 400 mA @ 20 V PCB Through Hole IP67 - - - - 6.1mm Brass - 20mΩ
RS Stock No. 762-4741
Mfr. Part No.8A2102-Z
TWD268.00
Each
units
DP3T On-On-On 3 A @ 250 V ac, 6 A @ 125 V ac PCB Through Hole - - - - - 10.5mm - - 10mΩ
RS Stock No. 123-2399
Mfr. Part No.5637A12
BrandAPEM
TWD275.00
Each
units
SPDT (On)-Off-On 4 A Panel Mount Solder - - - - 6.5mm 6.3mm Brass 30V dc 10mΩ
RS Stock No. 819-9319
Mfr. Part No.MTG 206 N
TWD424.00
Each
units
DPDT Latching 4 A @ 30 V dc Panel Mount Solder - - - - 12.5mm 11.5mm - - <20mΩ
RS Stock No. 124-5960
Mfr. Part No.S832
TWD1,124.00
Each
units
3PDT Latching 30 A Panel Mount Screw - - - - 12.5mm 22mm Chrome Plated Brass 30 V dc, 250 V ac 10mΩ
RS Stock No. 354-3005
Mfr. Part No.S-301
TWD150.00
Each
units
- - - - Solder - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 710-9505
Mfr. Part No.1-1825142-6
TWD123.00
Each
units
Single Pole Double Throw (SPDT) Latching 5 A @ 28 V dc PCB Through Hole IP67 - - - - 12.7mm Phenolic - 10mΩ
RS Stock No. 464-4749
Mfr. Part No.M-2032
TWD261.00
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. 448-0898
BrandRS PRO
TWD113.00
Each
units
Single Pole Double Throw (SPDT) Latching 400 mA @ 20 V PCB Through Hole - - - - - 5.33mm Chrome Plated Brass - 20mΩ
RS Stock No. 316-973
Mfr. Part No.FTD0904
TWD231.00
Each
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SPDT Latching 4 A @ 30 V dc Panel Mount Solder - - - - 6.2mm 11.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 123-2406
Mfr. Part No.5649A12
BrandAPEM
TWD267.00
Each
units
DPDT On-Off-On 4 A Panel Mount Solder - - - - 6.5mm 6.3mm Brass 30V dc 10mΩ
RS Stock No. 861-0305
Mfr. Part No.C3970BBAAA
TWD188.00
Each
units
DPDT On-Off-On 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS Stock No. 174-6410
Mfr. Part No.3531-003N00
BrandAPEM
TWD1,332.00
Each
units
Single Pole Single Throw (SPST) Latching 15 A @ 125 V ac Panel Mount Screw - - - - - 24mm Anodised Aluminium; Brass - 10mΩ
RS Stock No. 734-7163
BrandRS PRO
TWD127.00
Each
units
Single Pole Double Throw (SPDT) Latching 3 A @ 120 V ac PCB Through Hole IP67 - - - - 8.13mm Chromium Plated Brass - 20mΩ
RS Stock No. 692-8395
Mfr. Part No.638H/2
BrandAPEM
TWD246.00
Each
units
Single Pole Single Throw (SPST) On-Off-(On) 5 A @ 25 V dc Panel Mount Tab - - - - - 17.5mm Nickel Plated Brass - 10mΩ
New
RS Stock No. 196-0244
Mfr. Part No.M2029SS4G03
TWD304.00
Each
units
DPDT On-Off-On 400 mA Panel Mount - IP67 No - - 6.5mm 10.5mm Brass 28V ac/dc -
RS Stock No. 762-5164
Mfr. Part No.ATE1G-6M3-10-Z
TWD96.00
Each
units
Single Pole Double Throw (SPDT) (On)-Off-(On) 50 mA@ 48 V ac/dc PCB Through Hole - - - - - 6mm - - 50mΩ
RS Stock No. 354-2800
Mfr. Part No.G-22AP
TWD130.00
Each
units
Double Pole Double Throw (DPDT) Latching 100 mA @ 28 V ac/dc PCB Through Hole - - - - - 3.8mm Glass Fibre Reinforced PA - 80mΩ
RS Stock No. 124-5894
Mfr. Part No.B19JP
TWD142.00
Each
units
SPDT On-Off-(On) 100 mA PCB Through Hole IP65 - 4.9mm 6.2mm - 6.3mm Nickel Plated Brass 28V ac/dc 50mΩ
RS Stock No. 165-1482
Mfr. Part No.5649AB-21+U646
BrandAPEM
TWD294.00
Each
units
DPDT On-Off-On 3 A @ 250 V ac, 4 A @ 30 V dc, 6 A @ 125 V ac Panel Mount Solder - No - - 6.5mm 23.1mm Chrome Plated Brass 30 V dc, 125 V ac, 250 V ac 10mΩ