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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
    Key Switch Heads
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    Selector Switch Heads
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    Selector Switches

    2643 Products showing for Key Switches & Selector Switches

    1 of 133
    Lorlin Key Switch, SP-CO, 1 A @ 24V ac dc / 115V ac 3-Way Common-Key
    • RS Stock No. 711-8347
    • Mfr. Part No. SRL-5-F-S-2
    Each
    TWD375.00
    ABB Short Handle Selector Switch - (2NO) 3 Positions
    • RS Stock No. 479-3352
    • Mfr. Part No. 1SFA619210R1026 C3SS1-10B-20
    Each
    TWD760.00
    Better World
    Schneider Electric Harmony XB4 3-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 330-9120
    • Mfr. Part No. ZB4BG0
    Each
    TWD1,465.00
    Lorlin Key Switch, SPDT, 5 A @ 115 V ac 2-Way Random-Key
    • RS Stock No. 321-032
    • Mfr. Part No. SRL5DD2
    Each
    TWD325.00
    ABB ABB Modular Series 3 Position Selector Switch Head, 22mm Cutout, Black Handle
    • RS Stock No. 757-8840
    • Mfr. Part No. 1SFA611211R1006 M3SS2-10B
    Each
    TWD409.00
    Better World
    Schneider Electric ZB4 Series 2 Position Selector Switch Head, 22mm Cutout, Black Handle
    • RS Stock No. 220-5275
    • Mfr. Part No. ZB4BJ294
    Each
    TWD2,400.00
    Lorlin Key Switch, SPST, 500 mA @ 24 V 2-Way Flat, Random-Key
    • RS Stock No. 562-599
    • Mfr. Part No. SKL-12-AD2
    Each
    TWD236.00
    Idec IP65 Key Switch, SPST 2-Way
    • RS Stock No. 168-2548
    • Mfr. Part No. YW1K-2AE10
    Each
    TWD721.00
    Omron A165S Series 2 Position Selector Switch Head
    • RS Stock No. 214-6994
    • Mfr. Part No. A165S-T2M
    Each
    TWD728.00
    ABB Short Handle Selector Switch - (1NO+1NC) 3 Positions
    • RS Stock No. 231-9432
    • Mfr. Part No. 1SFA619212R1076 C3SS3-10B-11
    Each
    TWD722.00
    Better World
    Siemens SIRIUS ACT 3SU10 Series 2 Position Selector Switch Head, 22mm Cutout, Black Handle
    • RS Stock No. 173-6735
    • Mfr. Part No. 3SU1052-2BF10-0AA0
    Each
    TWD536.00
    Eaton IP66 Key Switch, SPDT 2-Way
    • RS Stock No. 810-3807
    • Mfr. Part No. 216517 M22-WRS/K11
    Each
    TWD2,231.00
    Better World
    Schneider Electric Harmony XB4 Series 2 Position Selector Switch Head, 22mm Cutout, Black Handle
    • RS Stock No. 330-9063
    • Mfr. Part No. ZB4BD4
    Each
    TWD490.00
    Eaton RMQ Titan 2-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 893-8580
    • Mfr. Part No. 111778 M22-WRS-MS2
    Each
    TWD2,163.00
    APEM 2-position Key Switch Head, Latching
    • RS Stock No. 693-2281
    • Mfr. Part No. A018223
    Each
    TWD1,212.00
    Better World
    Schneider Electric Harmony XB5 Series 2 Position Selector Switch Head, 22mm Cutout, Black Handle
    • RS Stock No. 609-2982
    • Mfr. Part No. ZB5AJ2
    Each
    TWD470.00
    Better World
    Schneider Electric Knob Selector Switch - (2NO) 22mm Cutout Diameter 3 Positions
    • RS Stock No. 330-8701
    • Mfr. Part No. XB4BD53
    Each
    TWD944.00
    Better World
    Siemens SIRIUS ACT 3SU10 2-position Key Switch Head, Latching, 22mm Cutout
    • RS Stock No. 193-3528
    • Mfr. Part No. 3SU1050-5HF01-0AA0
    Each
    TWD5,465.00
    Better World
    Schneider Electric Harmony XB4 Series 3 Position Selector Switch Head, 22mm Cutout, Blue Handle
    • RS Stock No. 330-9322
    • Mfr. Part No. ZB4BK1363
    Each
    TWD1,025.00
    RS PRO 3 Position Selector Switch Head, 22mm Cutout, Green Handle
    • RS Stock No. 188-1164
    Each
    TWD195.00
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