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. 354-2923
Mfr. Part No.M-2015
MYR26.95
Each
units
Single Pole Double Throw (SPDT) (On)-On 3 A@ 250 V ac, 6 A@ 125 V ac Panel Mount Solder - - - - - 10.5mm Chromium Plated Brass - 10mΩ
RS Stock No. 401-670
BrandRS PRO
MYR12.17
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. 783-1191
Mfr. Part No.7360K8
MYR89.75
Each
units
Double Pole Single Throw (DPST) Latching 10 A @ 250 V ac Panel Mount Screw - - - - 0.5in - - - -
RS Stock No. 879-8203
Mfr. Part No.2FA53-73/TABS
MYR13.523
Each (In a Pack of 10)
units
SPST Latching 15 A Panel Mount Solder - - - - 12.7mm 17.44mm Brass 250V ac -
RS Stock No. 354-3235
Mfr. Part No.S-821
MYR101.01
Each
units
Double Pole Single Throw (DPST) Latching 30 A@ 250 V ac, 30 A@ 30 V dc Panel Mount Screw - - - - - 22mm Brass - 10mΩ
RS Stock No. 448-0747
BrandRS PRO
MYR9.524
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. 354-3156
Mfr. Part No.S-301T
MYR36.18
Each
units
Single Pole Single Throw (SPST) Latching 6 A @ 250 V ac, 20 A @ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 842-4700
Mfr. Part No.2TL1-10
BrandHoneywell
MYR184.14
Each
units
DPDT On-On-On 6 A @ 230 V ac, 15 A @ 115 V ac, 20 A @ 28 V dc Panel Mount Screw - - - - - 17mm Metal, Plastic - -
RS Stock No. 317-623
Mfr. Part No.FTN79G04
MYR67.54
Each
units
Double Pole Double Throw (DPDT) Latching 6 A @ 250 V ac Panel Mount Solder - - - - 6.2mm 16.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 294-347
Mfr. Part No.T7-111A5
BrandOtto
MYR92.03
Each
units
Single Pole Single Throw (SPST) Latching 16 A @ 250 V ac Panel Mount Tab - - - - - 16.76mm Stainless Steel - -
RS Stock No. 518-5336
Mfr. Part No.Y32CP
BrandAPEM
MYR64.98
Each
units
Double Pole Double Throw (DPDT) On-Off-On 15 A @ 250 V ac Panel Mount Tab - - - - - 17.5mm - - 10mΩ
RS Stock No. 354-3184
Mfr. Part No.S-331T
MYR48.17
Each
units
Double Pole Single Throw (DPST) Latching 15 A@ 250 V ac, 15 A@ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 401-703
BrandRS PRO
MYR10.30
Each
units
SPDT Latching 5 A @ 250 V ac PCB Through Hole - - - - - 10.41mm Brass - 10mΩ
RS Stock No. 317-033
Mfr. Part No.FTG0904
MYR35.69
Each
units
Single Pole Double Throw (SPDT) (On)-Off-(On) 4 A @ 30 V dc Panel Mount Solder - - - - 6.2mm 10.5mm Chrome Plated Brass - 10mΩ
RS Stock No. 879-8219
Mfr. Part No.2FAA04-73
MYR28.25
Each
units
SPST Latching 20 A Panel Mount Screw - - - - 12.7mm 17.45mm Nickel Plated Brass 125V -
RS Stock No. 448-0753
BrandRS PRO
MYR11.798
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. 448-0775
BrandRS PRO
MYR17.978
Each (In a Pack of 5)
units
Double Pole Double Throw (DPDT) On-Off-On 5 A @ 28 V dc Panel Mount Solder - - - - 6.35mm 10.41mm Chromium Plated Brass - 10mΩ
RS Stock No. 317-847
Mfr. Part No.AWTP1504
MYR125.17
Each
units
Double Pole Double Throw (DPDT) On-Off-On 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 135-4446
Mfr. Part No.AWTP1504
MYR99.44
Each (In a Bag of 100)
units
DPDT On-Off-On 20 A @ 250 V ac Panel Mount Tab IP67 - - - - 17.5mm Brass - 10mΩ
RS Stock No. 222-730
Mfr. Part No.ET210N12-Z
MYR29.22
Each
units
DPDT On-On 7 A@ 250 V ac, 10 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ