Switches

Price (£)

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EMAS Double Spring Return Selector 30mm IP50 - H101S32 (II-0-I)

EMAS19837

EMAS Round Metal Multipole Selector Switch With Double Spring Return (II-0-I / 2-0-1) - 30mm Diameter - H101S32 - 2 NO - IP50 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS...

£11.40

EMAS Spring Return Selector Switch 30mm IP50 - H101S30 (II-0-I)

EMAS19834

EMAS Round Metal Multipole Selector Switch With Single Spring Return (II-0-I / 2-0-1) - 30mm Diameter - H101S31 - 2 NO - IP50 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS...

£9.23

EMAS Selector Switch - 30mm IP50 - H101S30 - (II-0-I) - 2 NO

EMAS19831

EMAS Round Metal Multipole Selector Switch (II-0-I / 2-0-1) - 30mm Diameter - H101S30 - 2 NO - IP50 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS metal selectors act as...

£11.40

EMAS Spring Return Selector Switch 30mm IP50 - H100S20 - (0-1)

EMAS19828

EMAS Round Metal Multipole Selector Switch With Spring Return (0-1) - 30mm Diameter - H100S21 - 1 NO - IP50 This metal selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS metal selectors act...

£6.80

EMAS Selector Switch - 30mm IP50 - H100S20 - (0-1) - 1 NO

EMAS19825

EMAS Round Metal Multipole Selector Switch (0-1) - 30mm Diameter - H100S20 - 1 NO - IP50 This metal selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS metal selectors act as a switch...

£8.41

EMAS Double Spring Return Selector - IP65 - CM101S32 - (II-0-I)

EMAS19474

EMAS Round Metal Multipole Selector Switch - Double Spring Return (2-0-1) - 22mm Diameter - CM101S32 - 2 NO - IP65 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS metal selectors...

£14.74

EMAS Single Spring Return Selector - IP65 - CM101S31 - (II-0-I)

EMAS19471

EMAS Round Metal Multipole Selector Switch - Single Spring Return (2-0-1) - 22mm Diameter - CM101S31 - 2 NO - IP65 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS metal selectors...

£14.74

EMAS Metal Selector - IP65 - CM303S30 - (II-0-I) - 2 NO + 2 NO

EMAS19468

EMAS Round Metal Multipole Selector Switch (2-0-1) - 22mm Diameter - CM303S30 - 2 NO + 2 NO - IP65 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) followed by another set of 2...

£23.81

EMAS Metal Selector Switch - IP65 - CM101S30 - (II-0-I) - 2 NO

EMAS19465

EMAS Round Metal Multipole Selector Switch (2-0-1) - 22mm Diameter - CM100S20 - 2 NO - IP65 This metal selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS metal selectors act as a switch...

£14.74

EMAS Metal Selector Spring Return - IP65 - CM100S21 - (0-1)

EMAS19462

EMAS Round Metal Multipole Selector Switch - Spring Return (0-1) - 22mm Diameter - CM100S21 - 1 NO - IP65 This metal selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS metal selectors act...

£11.52

EMAS Metal Selector Switch - IP65 - CM100S20 - (0-1) - 1 NO

EMAS19459

EMAS Round Metal Multipole Selector Switch (0-1) - 22mm Diameter - CM100S20 - 1 NO - IP65 This metal selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS metal selectors act as a switch...

£11.52

EMAS Double Spring Return Selector - CP101S32 - (II-0-I) - 2 NO

EMAS19133

EMAS Round Black Multipole Double Spring Return Selector Switch (II-0-I) - 22mm Diameter - CP101S32 - 2 NO - IP65 This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS plastic selectors act...

£11.37

EMAS Spring Return Selector - IP65 - CP101S31 - (II-0-I) - 2 NO

EMAS19130

EMAS Round Black Multipole Single Spring Return Selector Switch (II-0-I) - 22mm Diameter - CP101S31 - 2 NO - IP65 This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS plastic selectors act...

£11.37

EMAS Multipole Selector - CP303S30 - (II-0-I) - 2 NO + 2 NO

EMAS19127

EMAS Round Black Multipole Selector Switch (II-0-I) - 22mm Diameter - CP303S30 - 2 NO + 2 NO - IP65 This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) followed by another set of 2...

£20.47

EMAS Multipole Selector - CP305S30 - (II-0-I) - 2 NO + 2 NC

EMAS19124

EMAS Round Black Multipole Selector Switch (II-0-I) - 22mm Diameter - CP305S30 - 2 NO + 2 NC - IP65 This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) and 2 ‘NC’ (Normally Closed) blocks....

£20.47

EMAS Multipole Selector - IP65 - CP101S30 - (II-0-I) - 2 NO

EMAS19121

EMAS Round Black Multipole Selector Switch (II-0-I) - 22mm Diameter - CP101S30 - 2 NO - IP65 This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS plastic selectors act as a switch...

£11.37

EMAS Spring Return Selector - IP65 - CP100S21 - (0-1) - 1 NO

EMAS19118

EMAS Round Black Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - CP100S21 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch...

£8.16

EMAS Multipole Selector Switch - IP65 - CP100S20 - (0-1) - 1 NO

EMAS19115

EMAS Round Black Multipole Selector Switch (0-1) - 22mm Diameter - CP100S20 - 1 NO - IP65 This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch...

£8.16

EMAS Key Operated Selector - B102AC30 (II-0-I) 1 NO + 1 NC

EMAS18739

EMAS Round Black Key Operated Multipole Selector Switch (II-0-I) - 22mm Diameter - B102AC30 - 1 NO + 1 NC This black key operated selector switch has a contact configuration of 1 ‘NO’ (Normally Open) and 1 ‘NC’ (Normally...

£17.18

EMAS Key Operated Selector Switch - B102AC20 (0-1) 1 NO + 1 NC

EMAS18736

EMAS Round Black Key Operated Multipole Selector Switch (0-1) - 22mm Diameter - B102AC20 - 1 NO This black key operated selector switch has a contact configuration of 1 ‘NO’ (Normally Open) and 1 ‘NC’ (Normally Closed) blocks. With...

£17.18

EMAS Key Operated Selector Switch - B100AC20 (0-1) - 1 NO

EMAS18732

EMAS Round Black Key Operated Multipole Selector Switch (0-1) - 22mm Diameter - B100AC20 - 1 NO This black key operated selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. With this selector, the key can...

£14.18

EMAS Key Operated Spring Return Switch - B101AA32 (II-0-I) 2 NO

EMAS18729

EMAS Round Black Key Operated Multipole Selector Switch - Double Spring Return (II-0-I) - 22mm Diameter - B101AA32 - 2 NO This black key operated selector switch has a contact configuration of 2 ‘NO’ (Normally Open) block. The EMAS...

£17.18

EMAS Key Operated Spring Return Switch - B101AA31 (II-0-I) 2 NO

EMAS18726

EMAS Round Black Key Operated Multipole Selector Switch - Double Spring Return (II-0-I) - 22mm Diameter - B101AA32 - 2 NO This black key operated selector switch has a contact configuration of 2 ‘NO’ (Normally Open) block. The EMAS...

£17.18

EMAS Key Operated Selector Switch - B101AA30 (II-0-I) - 2 NO

EMAS18723

EMAS Round Black Key Operated Multipole Selector Switch (II-0-I) - 22mm Diameter - B101AA30 - 2 NO This black key operated selector switch has a contact configuration of 2 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as...

£17.18

Switches

What Are Switches Used For?

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.

 

Rocker Switch

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 and 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