Over 800,000 products available

Safety Interlock Switches & Components

An industrial switch is a device used to interrupt or redirect the flow of electricity within a circuit. The electronic switch is a simple binary device as it can only be 'open' or 'closed'. Open allows electrons to flow and closed stops the flow. Industrial switches operate in the same manner as household switches but are offered in different styles to suite the industrial applications.

Industrial switch types

We stock a wide range of industrial switches, below we have covered the most popular types:

  • Limit switches - used when a presence or position of an object is required. They're usually electromagnetically operated, activating when an object makes physical contact with the actuator.
  • Reed switches - composed of two ferrous reeds in a small glass casing. The switches are magnetised and move when the magnetic field is moved towards the switch. You can see this if you place a tablet inside a protective case, it switches off as the magnet activates the reed switch.
  • Rotary switches - an alternative to a toggle or side switches, rotary switches allow the user to turn a knob or shaft that increases or decreases the resistance conducted through the contacts dependant on the direction of turn. Rotary switches allow different actuation positions, turning different circuits on/off or increasing/decreasing the value of the circuit. Some rotary switches can be configured to control multiple contacts simultaneously at a single switch position.
  • Thermistors - turn circuits on and off dependent on changes in temperature. NTC (Negative Temperature Coefficient) thermistors resistance changes as the temperature drops and are commonly used as a temperature sensor. PTC (Positive Temperature Coefficient) thermistors resistance increases as temperature rises, commonly used to provide over current protection.
  • Thermostats - used to regulate temperatures of liquid or gas. There are two main types of thermostats, capillary and bimetallic.
  • Isolator & switch disconnectors - used to ensure that a circuit is completely powered down in order for it to be serviced. They isolate a given part of the circuit by cutting off its electrical supply, making it safe to work on.
  • Non-fused switch disconnectors - provide the same functionality as switch disconnectors but instead of using a fuse to break the circuit, they use either a rotary or knife-blade disconnect.
Hinge Switches
Non Contact Safety Switches
Safety Interlock Actuators & Magnets
Safety Interlock Adapters & Mounts
Safety Interlock Components
Safety Interlock Switches
Solenoid Interlock Switches

3434 Products showing for Safety Interlock Switches & Components

Sort by
In Stock
Schmersal AZM 300 Series Solenoid Interlock Switch, Power to Unlock
  • RS Stock No. 880-1703
  • Mfr. Part No. AZM300Z-ST-1P2P
Subtotal (1 unit)
£583.42(exc. VAT)
£583.42/unit
In Stock
Schmersal RSS 36 Series RFID Non-Contact Safety Switch, Fibreglass Reinforced Thermoplastic Housing, 26.4V dc, 2 PNP,
  • RS Stock No. 880-1741
  • Mfr. Part No. RSS 36-D-ST
Subtotal (1 unit)
£146.16(exc. VAT)
£146.16/unit
In Stock
Schmersal AZM 170 Series Solenoid Interlock Switch, Power to Unlock
  • RS Stock No. 741-8679
  • Mfr. Part No. AZM 170-02ZRK 24 VAC/DC
Subtotal (1 unit)
£282.71(exc. VAT)
£282.71/unit
In Stock
Schmersal AZM 161 Series Solenoid Interlock Switch, Power to Unlock
  • RS Stock No. 617-5065
  • Mfr. Part No. AZM 161SK-12/12RK-024
Subtotal (1 unit)
£291.66(exc. VAT)
£291.66/unit
In Stock
Allen Bradley 440K Safety Rated Interlock Switch, Keyed Actuator Included, Fibreglass Reinforced Polybutylene
  • RS Stock No. 178-181
  • Mfr. Part No. 440K-T11090
Subtotal (1 unit)
£49.01(exc. VAT)
£49.01/unit
In Stock
Allen Bradley Guardmaster 440K Safety Rated Interlock Switch, Keyed Actuator Included, Fibreglass Reinforced
  • RS Stock No. 489-4887
  • Mfr. Part No. 440K-E33041
Subtotal (1 unit)
£35.83(exc. VAT)
£35.83/unit
In Stock
Allen Bradley Guardmaster 440G-L Series Solenoid Interlock Switch, Power to Unlock Actuator Included
  • RS Stock No. 356-6171
  • Mfr. Part No. 440G-L07264
Subtotal (1 unit)
£558.59(exc. VAT)
£558.59/unit
In Stock
IDEM KL1-P Series Solenoid Interlock Switch, Power to Unlock
  • RS Stock No. 826-3953
  • Mfr. Part No. 221301
Subtotal (1 unit)
£147.27(exc. VAT)
£147.27/unit
Sponsored
A black schmersal switch in an industrial setting
Complete Safety Switching Solutions from Schmersal
Explore Schmersal's trusted range of safety technologies, including Non-Contact Safety Switches, Safety Interlock Switches and Solenoid Interlock Switches. Designed for reliable machine protection, enhanced operational safety, and long-term performance across industrial applications.
Shop Now
In Stock
RS PRO RS Pro Series Magnetic Non-Contact Safety Switch, ABS Housing, 24V dc, 2 NO/1 NC, Wire
  • RS Stock No. 656-668
Subtotal (1 unit)
£246.64(exc. VAT)
£246.64/unit
In Stock
Allen Bradley 440G-T Series Solenoid Interlock Switch, Power to Unlock
  • RS Stock No. 351-3852
  • Mfr. Part No. 440G-T27121
Subtotal (1 unit)
£249.24(exc. VAT)
£249.24/unit
In Stock
Allen Bradley Guardmaster 440N Series Magnetic Non-Contact Safety Switch, Plastic Housing, 24V dc, 2 NC, 10 m Cable
  • RS Stock No. 703-4851
  • Mfr. Part No. 440N-Z2NRS1B
Subtotal (1 unit)
£81.85(exc. VAT)
£81.85/unit
In Stock
Allen Bradley Guardmaster 440K Safety Interlock Switch, Keyed Actuator Included, Fibreglass Reinforced Polybutylene
  • RS Stock No. 792-3082
  • Mfr. Part No. 440K-T11467
Subtotal (1 unit)
£55.61(exc. VAT)
£55.61/unit
In Stock
SICK RE2 Safety Interlock Switch, Magnet Actuator Included, Vistal, Magnet
  • RS Stock No. 285-8971
  • Mfr. Part No. RE21-SA03
Subtotal (1 unit)
£41.75(exc. VAT)
£41.75/unit
In Stock
Allen Bradley Guardmaster Actuator for Use with TLS-GD2 Interlock Safety Switch
  • RS Stock No. 351-3880
  • Mfr. Part No. 440G-A27143
Subtotal (1 unit)
£25.90(exc. VAT)
£25.90/unit
In Stock
Telemecanique Sensors XCST Series Solenoid Interlock Switch
  • RS Stock No. 195-1772
  • Mfr. Part No. XCSTE5512
Subtotal (1 unit)
£344.70(exc. VAT)
£344.70/unit
In Stock
Carlo Gavazzi MC36C Series Magnetic Safety Switch, Plastic Housing, 24V dc, 2 NO, Cable
  • RS Stock No. 276-3262
  • Mfr. Part No. MC36CH2ORA2
Subtotal (1 unit)
£40.36(exc. VAT)
£40.36/unit
In Stock
Allen Bradley Guardmaster 440G-MT Series Solenoid Interlock Switch, Power to Unlock Actuator Included
  • RS Stock No. 873-2187
  • Mfr. Part No. 440G-MT47037
Subtotal (1 unit)
£222.83(exc. VAT)
£222.83/unit
In Stock
Pilz PSEN Series Magnetic Non-Contact Safety Switch, Plastic Housing, 24V dc, NC, NO, M8
  • RS Stock No. 824-4914
  • Mfr. Part No. 506405
Subtotal (1 unit)
£51.68(exc. VAT)
£51.68/unit
In Stock
Allen Bradley 440G-T Series Solenoid Interlock Switch, Power to Lock
  • RS Stock No. 357-9199
  • Mfr. Part No. 440G-T27127
Subtotal (1 unit)
£242.08(exc. VAT)
£242.08/unit
In Stock
Allen Bradley Guardmaster 440N Series Magnetic Non-Contact Safety Switch, Plastic Housing, 300V dc, NC, 3 m Cable
  • RS Stock No. 335-5763
  • Mfr. Part No. 440N-S32023
Subtotal (1 unit)
£88.42(exc. VAT)
£88.42/unit
Results per page

Guides & Articles

Machine Safety Guide
This guide covers everything from why machine safety is important and the regulations to the best products available.
Read more
Discover with DesignSpark
Your job to automate industry? Automation engineers and manufacturers alike are sharing on DesignSpark. Join them now.
Read More

Altivar Variable Speed Drives from Schneider Electric

Altivar Variable Speed Drives from Schneider Electric

Related links