Switches

Switches are commonly used in electronic circuits. They enable control of the circuit by switching it on/off or controlling a range of other features.

How do they work?

Electronic switches are binary devices which sit within a circuit to control the flow of electricity. They work by interrupting the flow of electrons and switching the circuit on or off.

Switches contain terminals which connect to metal contacts. When the terminal and contact are touching, the switch is closed and the current can pass through. When the terminal and contact are not touching, the switch is open and the current cannot pass through the circuit.

What are Poles Throws?

The number of circuits controlled by a switch is referred to as "poles". The number of positions that the switch can adopt is called "throws". The combinations of these are:

  • SPST (Single Pole Single Throw)
  • SPDT (Single Pole Double Throw)
  • DPST (Double Pole Single Throw)
  • DPST (Double Pole Double Throw)

What types of switches are there?

The type of switch you require depends on the connections you wish to make within your circuit. Switches are often grouped by the way they are operated, for example, rocker switches that rock side to side. Alternatively, they are classified by their application, for example, keypad switches are used with keypads. Here are some examples of switch types:

  • Detector
  • DIP/SIP
  • Foot
  • Hall Effect
  • Joystick
  • Key
  • Keyboard/Keypad
  • Piezo
  • Microswitches
  • Rotary
  • Push Button
  • Toggle
Related Products
Alps SSCF two way detection switch offers actuations ...
Description:
Alps SSCF two way detection switch offers actuations from both left & right, provding a flexible product for use in a wide variety of applications. The SSCF series offers both PCB & leaded termination options. Features and Benefits50,000 cycle mean ...
Alps SSCQ series of compact bi-directional detector switches ...
Description:
Alps SSCQ series of compact bi-directional detector switches offering one of the industry's smallest two-step product. The SSCQ series takes up to 30% less space than conventional detector switches, making the series an ideal solution for applications where space is ...
The Alps SSCTL series of micro detector switches ...
Description:
The Alps SSCTL series of micro detector switches offer a lever-actuated switch solution for space-critical applications. The SSCTL series is available with both PCB termination or flying leads to ensure your application is covered. Features and Benefits10,000 cycle mean time ...
The SDS series of micro miniature detect switches ...
Description:
The SDS series of micro miniature detect switches from C & K. Typical applications include consumer electronics, medical devices, ATCA and MicroTCA devices. Low profile package sits just 2mm off PCB2mm over travel ideal for detector applicationsLow actuation forceMinimum operating ...