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庫存編號 861-0309
製造零件編號C3972BBAAA
TWD243.00
單位
Double Pole Double Throw (DPDT) (On)-Off-(On) 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 350-254
製造零件編號C1770HOAAF
TWD151.00
單位
Double Pole Double Throw (DPDT) On-Off-On 20 A @ 250 V ac Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS庫存編號 861-0305
製造零件編號C3970BBAAA
TWD179.00
單位
Double Pole Double Throw (DPDT) On-Off-On 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 861-0286
製造零件編號C3920BAAAA
TWD122.00
單位
Single Pole Double Throw (SPDT) On-Off-On 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 350-210
製造零件編號C1710HOAAC
TWD115.00
單位
Single Pole Double Throw (SPDT) Latching 20 A @ 250 V ac Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS庫存編號 350-232
製造零件編號C1750HOAAI
TWD204.00
單位
Double Pole Single Throw (DPST) Latching 20 A @ 250 V ac Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS庫存編號 861-0289
製造零件編號C3910BAAAA
TWD176.00
單位
Single Pole Double Throw (SPDT) Latching 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 861-0295
製造零件編號C3922BAAAA
TWD141.00
單位
Single Pole Double Throw (SPDT) (On)-Off-(On) 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 350-226
製造零件編號C1720HOAAG
TWD87.00
單位
Single Pole Double Throw (SPDT) On-Off-On 20 A @ 250 V ac Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS庫存編號 861-0270
製造零件編號C3900BAAAA
TWD121.00
單位
Single Pole Single Throw (SPST) Latching 16 A @ 250 V ac Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 861-0302
製造零件編號C3961BBAAA
TWD268.00
單位
Double Pole Double Throw (DPDT) (On)-On 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 861-0298
製造零件編號C3950BBAAA
TWD160.00
單位
Double Pole Single Throw (DPST) Latching 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 350-248
製造零件編號C1760HOAAF
TWD159.00
單位
Double Pole Double Throw (DPDT) Latching 16 A Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS庫存編號 861-0282
製造零件編號C3911BAAAA
TWD188.00
單位
Single Pole Double Throw (SPDT) (On)-On 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -
RS庫存編號 350-204
製造零件編號C1700HOAAG
TWD105.00
單位
SPST Latching 16 A @ 250 V ac Panel Mount Solder, Tab IP40 - - - 12.7mm 16.4mm PC - 100mΩ
RS庫存編號 861-0292
製造零件編號C3960BBAAA
TWD255.00
單位
Double Pole Double Throw (DPDT) Latching 20 A Panel Mount Tab - - - - 12.7mm 17.5mm Metal - -