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
MYR28.33
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. 354-3156
Mfr. Part No.S-301T
MYR33.28
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. 354-3235
Mfr. Part No.S-821
MYR94.10
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. 354-3184
Mfr. Part No.S-331T
MYR41.97
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. 354-3207
Mfr. Part No.S-333T
MYR48.22
Each
units
Double Pole Double Throw (DPDT) On-Off-On 15 A@ 250 V ac, 15 A@ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 475-1847
Mfr. Part No.A-12HP
MYR24.97
Each
units
SPDT Latching 100 mA @ 28 V ac/dc PCB Through Hole - - - - - 6.3mm Brass - 50mΩ
RS Stock No. 354-3229
Mfr. Part No.S-338T
MYR66.42
Each
units
Double Pole Double Throw (DPDT) (On)-Off-(On) 6 A @ 250 V ac, 20 A @ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 354-3178
Mfr. Part No.S-303T
MYR32.68
Each
units
Single Pole Double Throw (SPDT) On-Off-On 6 A @ 250 V ac, 20 A @ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 124-5905
Mfr. Part No.M2011S3S4W01
MYR25.11
Each
units
SPST Latching 4 A @ 30 V dc, 6 A @ 125 V ac PCB Solder - - - - 6.5mm 6.5mm Chrome Plated Brass 30 V dc, 250 V ac 10mΩ
RS Stock No. 124-5946
Mfr. Part No.S7A
MYR33.56
Each
units
DPDT On-Off-On 20 A Panel Mount Solder IP67 - - - 12.5mm 17.5mm Chrome Plated Brass 30 V dc, 250 V ac 10mΩ
RS Stock No. 354-3241
Mfr. Part No.S-822
MYR129.26
Each
units
Double Pole Double Throw (DPDT) Latching 30 A@ 250 V ac, 30 A@ 30 V dc Panel Mount Screw - - - - - 22mm Brass - 10mΩ
RS Stock No. 354-3061
Mfr. Part No.S-6A
MYR35.79
Each
units
Double Pole Double Throw (DPDT) Latching 20 A@ 125 V ac, 20 A@ 30 V dc Panel Mount Solder - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 354-3190
Mfr. Part No.S-332T
MYR48.71
Each
units
Double Pole Double Throw (DPDT) Latching 15 A@ 250 V ac, 15 A@ 30 V dc Panel Mount Screw - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 354-2995
Mfr. Part No.S-1A
MYR13.77
Each
units
- - - - Solder - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 354-3005
Mfr. Part No.S-301
MYR18.85
Each
units
- - - - Solder - - - - - 17.5mm Brass - 10mΩ
RS Stock No. 464-4711
Mfr. Part No.D2-2022P
MYR29.83
Each
units
Double Pole Double Throw (DPDT) Latching 100 mA @ 48 V ac/dc PCB Through Hole - - - - - 10.5mm Brass - 50mΩ
RS Stock No. 354-2721
Mfr. Part No.G-12AP
MYR16.76
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. 464-5859
Mfr. Part No.M-2042
MYR49.50
Each
units
4PDT Latching 3 A@ 30 V dc, 6 A@ 125 V ac PCB Through Hole IP67 - - - - - Chromium Plated Brass - 10mΩ
RS Stock No. 181-3687
Mfr. Part No.M2022S3S2G30
MYR57.70
Each
units
- - - - - - - - - - - - - -
RS Stock No. 453-7966
Mfr. Part No.TL-22H2DKNWS1
MYR81.27
Each
units
Double Pole Double Throw (DPDT) Latching 3 A @ 250 V ac Panel Mount Solder IP65 Yes - - 12.5mm 17.5mm PC - 10mΩ