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    Key Switches & Selector Switches

    A key switch or lock switch setup is an ideal way to enhance the security and safety of various important - or potentially hazardous - workplace systems and mechanisms. Our selection of key switches and covers is sourced from leading brands known for reliability, durability and quality, including APEM, C&K, Honeywell, Omron, Lorlin, Saia-Burgess and NKK Switches.

    How do key switches work, and what are the main differences between them?

    Key switches or lock switches include a range of switch types that can only be actuated when used simultaneously with a physical key. This helps prevent unauthorised access to (or accidental triggering of) whichever system, machinery or process is controlled by the key switch actuator mechanism.

    Key switches are widely used in processes such as automation control, comms systems, fire and security alarm panels, power distribution, and automatic door controls. Important factors to consider when buying key switches online include:

    • Number of positions - this can typically range anywhere between 1-6 positions, giving you full control over how many different states and potential functions the key switch is able to differentiate between as it’s turned.
    • Switch operation - common types of key switch operation include latching, momentary, maintained, snap action, and spring return. These operations can be used to control various lock switch function arrays such as off-on, on-off-start, break before make, and acc-off-ign.
    • Contact configuration - controls how the key switch behaves at various positions when turned, with common examples including Single Throw (ST), Single Pole Double Throw (SPDT), and Double Pole Double Throw (DPDT).
    • Key trapping - whether or not the key must be retained in the lock switch once actuated, in order for the relevant circuit to remain open/closed.
    • IP ratings - the level of protection you require against ingress of dirt/moisture around the key switch housing, dependent on environmental conditions.
    • Key switch covers and key types - caps, covers and bezels can all improve security or ease of access to key switch modules, while key types can range from simple fish keys to fully toothed and cut spares for various lock switch series and standards.
    Key Switch Heads
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    2716 Products showing for Key Switches & Selector Switches

    1 / 136
    Better World
    Schneider Electric Harmony 9001K 2-position Key Switch Head, Latching, 30mm Cutout
    • RS Stock No. 542-8194
    • Mfr. Part No. 9001KS11K1R
    Each
    MYR632.81
    Better World
    Siemens Key Switch, SPST 2-Way
    • RS Stock No. 181-2856
    • Mfr. Part No. 3SU1100-4BF11-3BA0
    Each
    MYR198.36
    EAO Key Switch Head, Latching
    • RS Stock No. 279-0092
    • Mfr. Part No. 704.121.018
    Each
    MYR297.87
    Better World
    Schneider Electric ZB5 2-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 221-1981
    • Mfr. Part No. ZB5AG02D
    Each
    MYR404.61
    Better World
    Siemens SIRIUS ACT 3SU10 2-position Key Switch Head, Momentary, 22mm Cutout
    • RS Stock No. 193-3587
    • Mfr. Part No. 3SU1000-5HC01-0AA0
    Each
    MYR490.50
    Better World
    Schneider Electric Selector Switch - (2 NO) 3 Positions
    • RS Stock No. 609-6041
    • Mfr. Part No. XB5AD33
    Each
    MYR141.65
    Better World
    Siemens SIRIUS ACT 3SU10 Series 4 Position Selector Switch Head
    • RS Stock No. 183-7267
    • Mfr. Part No. 3SU1000-2AS60-0AA0
    Each
    MYR114.67
    Better World
    Schneider Electric XB4 2-position Key Switch Head, Spring Return, 22mm Cutout
    • RS Stock No. 212-4893
    • Mfr. Part No. ZB4BG6TEC10
    Each (In a Pack of 2)
    MYR460.33
    Siemens Key Switch
    • RS Stock No. 274-020
    • Mfr. Part No. 3SU1900-0XE10-0AA0
    Each
    MYR1,879.40
    Siemens Key Switch
    • RS Stock No. 275-779
    • Mfr. Part No. 3SU1900-0XD10-0AA0
    Each
    MYR1,879.40
    Better World
    Schneider Electric ZB4 2-position Key Switch Head, Stay Put, 22mm Cutout
    • RS Stock No. 211-8534
    • Mfr. Part No. ZB4BG4TEC10
    Each
    MYR783.97
    Better World
    Siemens SIRIUS ACT 3SU10 2-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 874-1951
    • Mfr. Part No. 3SU1050-5BF11-0AA0
    Each
    MYR389.14
    Better World
    Siemens SIRIUS ACT 3SU10 2-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 874-1942
    • Mfr. Part No. 3SU1050-5BF01-0AA0
    Each
    MYR389.14
    Better World
    Siemens IP66, IP67, IP69(IP69K) Key Switch 2-Way Flat-Key
    • RS Stock No. 153-196
    • Mfr. Part No. 3SU1100-4BF21-3TA0
    Each
    MYR314.92
    Omron IP65 Key Switch, DPDT 3-Way
    • RS Stock No. 818-1857
    • Mfr. Part No. A165K-T3M-2
    Each
    MYR238.37
    Better World
    Siemens SIRIUS ACT 3SU10 2-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 193-4211
    • Mfr. Part No. 3SU1000-5PF21-0AA0
    Each
    MYR734.49
    Kraus & Naimer Key Switch Head
    • RS Stock No. 350-0856
    • Mfr. Part No. S0.V750D*GBA003
    Each
    MYR98.75
    Better World
    Schneider Electric IP66, IP67, IP69(IP69K) Key Switch, 2NO 3-Way
    • RS Stock No. 330-8739
    • Mfr. Part No. XB4BG33
    Each
    MYR169.54
    Lorlin High Security Key Switch, DPST, 50 mA @ 250 V ac 2-Way Flat-Key
    • RS Stock No. 562-573
    • Mfr. Part No. DSL-6-D-S
    Each
    MYR390.43
    Siemens IP65 Key Switch, 100 mA 2-Way
    • RS Stock No. 256-7173
    • Mfr. Part No. 6AV76741ME500AA0
    Each
    MYR803.73
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