Key Switches & Accessories

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.

Related Products
Raised conical front for applications requiring a shorter ...
Description:
Raised conical front for applications requiring a shorter depth switch. Gold plated contacts. Panel Clip fixing, panel hole cutter stock no. 605-633PCB connections (hand soldering possible)Test Voltage: 1KV for 1 min. Supplied with 2 identical keys. Spare Keys not available. ...
Flush bezel projects only 2 mm from front ...
Description:
Flush bezel projects only 2 mm from front of panel. Standard bezel with only a panel depth of 27.9 mm. Removable contact blocks ideal for single board mounting. Pushbuttons, selector switches, and key selector switches with up to 3PDT contacts.Wave ...
Rectangular Bezel3 position selection. Gold plated contacts. Panel ...
Description:
Rectangular Bezel3 position selection. Gold plated contacts. Panel Clip fixing, panel hole cutter stock no. 605-633Panel Cut-out 19 x 19PCB connections (hand soldering possible)Test Voltage: 1KV for 1 min. Supplied with 2 identical keys. Spare Keys not available.
The A6 series of pushbuttons and pilot devices ...
Description:
The A6 series of pushbuttons and pilot devices from Idec.Features include snap action, double throw contacts. Ideal for such applications as PLC inputs, logic level switching or where space is at a premium.Models include illuminated and non-illuminated pushbuttons, pilot lights, ...