Switches

Price (£)

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EMAS Black Spring Return Selector - B100SL21H - (0-1) - 1 NO

EMAS18602

EMAS Round Black Illuminated Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100SL21H - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a...

£5.79

EMAS Green Spring Return Selector - B100SL21Y - (0-1) - 1 NO

EMAS18599

EMAS Round Green Illuminated Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100SL21Y - 1 NO This green selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a...

£7.16

EMAS Yellow Spring Return Selector - B100SL21S - (0-1) - 1 NO

EMAS18596

EMAS Round Yellow Illuminated Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100SL21S - 1 NO This yellow selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a...

£7.16

EMAS Blue Spring Return Selector - B100SL21M - (0-1) - 1 NO

EMAS18593

EMAS Round Blue Illuminated Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100SL21M - 1 NO This blue selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a...

£7.16

EMAS Red Spring Return Selector - B100SL21K - (0-1) - 1 NO

EMAS18590

EMAS Round Red Illuminated Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100SL21K - 1 NO This red selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a...

£5.79

EMAS Black Multipole Selector Switch - B100SL20H (0-1) - 1 NO

EMAS18587

EMAS Round Black Illuminated Multipole Selector Switch (0-1) - 22mm Diameter - B100SL20H - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and...

£7.16

EMAS Green Multipole Selector Switch - B100SL20Y (0-1) - 1 NO

EMAS18584

EMAS Round Green Illuminated Multipole Selector Switch (0-1) - 22mm Diameter - B100SL20Y - 1 NO This green selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and...

£7.16

EMAS Yellow Multipole Selector Switch - B100SL20S (0-1) - 1 NO

EMAS18581

EMAS Round Yellow Illuminated Multipole Selector Switch (0-1) - 22mm Diameter - B100SL20S - 1 NO This yellow selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and...

£5.80

EMAS Blue Multipole Selector Switch - B100SL20M - (0-1) - 1 NO

EMAS18578

EMAS Round Blue Illuminated Multipole Selector Switch (0-1) - 22mm Diameter - B100SL20M - 1 NO This blue selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and...

£7.16

EMAS Red Multipole Selector Switch - B100SL20K - (0-1) - 1 NO

EMAS18575

EMAS Round Red Illuminated Multipole Selector Switch (0-1) - 22mm Diameter - B100SL20K - 1 NO This red selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and...

£7.16

EMAS White Spring Return Selector - B100SL21B - (0-1) - 1 NO

EMAS18572

EMAS Round White Illuminated Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100SL21B - 1 NO This white selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a...

£7.16

EMAS White Multipole Selector Switch - B100SL20B - (0-1) - 1 NO

EMAS18569

EMAS Round White Illuminated Multipole Selector Switch (0-1) - 22mm Diameter - B100SL20B - 1 NO This white selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and...

£7.16

EMAS Spring Return Selector Switch - B100T21 - 90˚ (0-1) - 1 NO

EMAS18564

EMAS Round Black Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100T21 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch...

£6.88

EMAS Multipole Selector Switch - B100R20 - 45˚ (0-1) - 1 NO

EMAS18566

EMAS Round Black Multipole Selector Switch (0-1) - 22mm Diameter - B100R20 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and provide...

£6.88

EMAS Spring Return Selector Switch - B100R21 - 45˚ (0-1) - 1 NO

EMAS18560

EMAS Round Black Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100R21 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch...

£5.56

EMAS Multipole Selector Switch - B100T20 - 90˚ (0-1) - 1 NO

EMAS18557

EMAS Round Black Multipole Selector Switch (0-1) - 22mm Diameter - B100T20 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and provide...

£6.88

EMAS Double Spring Return Selector - B101S32 - (II-0-I) - 2 NO

EMAS18554

EMAS Round Black Multipole Double Spring Return Selector Switch (II-0-I) - 22mm Diameter - B101S32 - 2 NO This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS plastic selectors act as a...

£9.89

EMAS Spring Return Selector Switch - B101S31 - (II-0-I) - 2 NO

EMAS18551

EMAS Round Black Multipole Single Spring Return Selector Switch (II-0-I) - 22mm Diameter - B101S31 - 2 NO This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS plastic selectors act as a...

£9.89

EMAS Multipole Selector Switch - B101S30 - (II-0-I) - 2 NO

EMAS18548

EMAS Round Black Multipole Selector Switch (II-0-I) - 22mm Diameter - B101S30 - 2 NO This black selector switch has a contact configuration of 2 ‘NO’ (Normally Open) blocks. The EMAS plastic selectors act as a switch and provide...

£9.89

EMAS Spring Return Selector Switch - B100S21 - (0-1) - 1 NO

EMAS18544

EMAS Round Black Multipole Spring Return Selector Switch (0-1) - 22mm Diameter - B100S21 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch...

£6.88

EMAS Multipole Selector Switch - B100S20 - (0-1) - 1 NO

EMAS18541

EMAS Round Black Multipole Selector Switch (0-1) - 22mm Diameter - B100S20 - 1 NO This black selector switch has a contact configuration of 1 ‘NO’ (Normally Open) block. The EMAS plastic selectors act as a switch and provide...

£6.88

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