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. 222-730
Mfr. Part No.ET210N12-Z
MYR30.72
Each
units
DPDT On-On 7 A@ 250 V ac, 10 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-819
Mfr. Part No.ET115A12-Z
MYR27.77
Each
units
SPST On-Off 10 A@ 250 V ac, 15 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-897
Mfr. Part No.ET220K12-Z
MYR33.84
Each
units
DPST On-Off 12 A@ 250 V ac, 20 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-544
Mfr. Part No.ATE2D-2M3-10-Z
MYR18.33
Each
units
DPDT On-On 50 mA @ 48 V ac/dc PCB Through Hole - - - - - 6mm - - 50mΩ
RS Stock No. 222-421
Mfr. Part No.FT2D-2M-Z
MYR22.05
Each
units
DPDT On-On 0.4 VA@ 28 V dc PCB Through Hole - - - - - 3.8mm - - 100mΩ
RS Stock No. 222-746
Mfr. Part No.ET210P12-Z
MYR33.10
Each
units
DPDT On-Off-On 7 A@ 250 V ac, 10 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-572
Mfr. Part No.ATE1D-5M3-10-Z
MYR16.23
Each
units
SPDT On-On 50 mA@ 48 V ac/dc PCB Through Hole - - - - - 6mm - - 50mΩ
RS Stock No. 180-6965
Mfr. Part No.CFT2-1DC6-AW
MYR27.175
Each (In a Tray of 100)
units
SPDT Latching 0.4 VA PCB Through Hole - - - - - 3.8mm - 28V dc 100mΩ
RS Stock No. 222-695
Mfr. Part No.ET110A12-Z
MYR33.38
Each
units
SPST On-Off 7 A@ 250 V ac, 10 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 180-6966
Mfr. Part No.CFT2-1DC-AW
MYR25.847
Each (In a Tray of 100)
units
SPDT Latching 0.4 VA PCB Through Hole - - - - - 3.8mm - 28V dc 100mΩ
RS Stock No. 222-853
Mfr. Part No.ET215N12-Z
MYR36.61
Each
units
DPDT On-On 10 A@ 250 V ac, 15 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 180-6970
Mfr. Part No.CF-TA-1FB4-A12
MYR52.309
Each (In a Bag of 20)
units
SPDT (On)-On 50 mA PCB Surface Mount - - - - - 6mm - 48V ac/dc 100mΩ
RS Stock No. 762-4928
Mfr. Part No.8J1022-Z
MYR27.84
Each
units
Single Pole Double Throw (SPDT) On-Off-On 3 A@ 250 V ac, 6 A@ 125 V ac PCB Through Hole - - - - - 6.8mm - - 10mΩ
RS Stock No. 222-831
Mfr. Part No.ET115E12-Z
MYR37.31
Each
units
SPDT On-Off-On 10 A@ 250 V ac, 15 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-724
Mfr. Part No.ET210K12-Z
MYR29.17
Each
units
DPST On-Off 7 A @ 250 V ac, 10 A @ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-522
Mfr. Part No.ATE1E-2M3-10-Z
MYR15.51
Each
units
SPDT On-Off-On 50 mA@ 48 V ac/dc PCB Through Hole - - - - - 6mm - - 50mΩ
RS Stock No. 222-459
Mfr. Part No.FT1D-5M-Z
MYR18.44
Each
units
SPDT On-On 0.4 VA@ 28 V dc PCB Through Hole - - - - - 3.8mm - - 100mΩ
RS Stock No. 180-6972
Mfr. Part No.CF-TA-1HB4-A12
MYR52.309
Each (In a Bag of 20)
units
SPDT On-Off-(On) 50 mA PCB Surface Mount - - - - - 6mm - 48V ac/dc 100mΩ
RS Stock No. 222-881
Mfr. Part No.ET120D12-Z
MYR34.29
Each
units
SPDT On-On 12 A@ 250 V ac, 20 A@ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ
RS Stock No. 222-869
Mfr. Part No.ET215P12-Z
MYR34.22
Each
units
DPDT On-Off-On 10 A @ 250 V ac, 15 A @ 125 V ac Panel Mount Solder - - - - - 17mm - - 20mΩ