Safety-Rated Interlock Switches

Safety rated interlock switches are safeguarding measures designed to improve safety in situations where guards or gates are used around hazardous machinery or equipment.

What are safety rated interlock switches used for?

In industrial situations, safety rated interlock switches prevent or permit the use of machinery, depending on safety conditions. They allow current to pass to the machine when it is safe to operate, for example when the machine's guard is closed. And they cut off the power if there's a potential hazard, such as a guard being opened. When a dangerous piece of equipment such as a metalworking machine is in operation, safety rated interlock switch might be used to ensure safety gates remain closed, excluding workers from hazardous areas.

Types of safety rated interlock switches

Safety rated interlock switches vary according to their lock type, maximum current and voltage, as well as their housing material. Guard-locking switches prevent access to machine parts that may still be in motion, even when the power has been cut. Hinge switches will close protective gates and guards in unsafe conditions.


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Description Price Connection Type Lock Style Normal State Configuration Housing Material Maximum AC Voltage Maximum DC Voltage Safety Contacts Range Actuator Included Lock Type Number of Head Directions Series Auxiliary Contacts Depth
RS Stock No. 252-3864
Mfr. Part No.XCSPA591
TWD1,357.00
Each
units
- Key 1NC/1NO Polyamide 240V 250V - Preventa - - 8 XCSPA - 30mm
RS Stock No. 362-2782
Mfr. Part No.AZ16-12ZI-B1-M20
BrandSchmersal
TWD2,565.00
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - Yes - 3 AZ16 1NO 30mm
RS Stock No. 757-9231
Mfr. Part No.D4NS-1BF
BrandOmron
TWD1,251.00
Each
units
Screw Key 2NC Plastic 240V 250V - - - - 4 D4NS - 30mm
RS Stock No. 826-3896
Mfr. Part No.208001
BrandIDEM
TWD3,534.00
Each
units
M20 Key 2NC/1NO Stainless Steel 240V - 2NC Kobra - - 4 K-SS 1NO 37.5mm
RS Stock No. 153-185
Mfr. Part No.GKEC03L
BrandHoneywell
TWD1,722.00
Each
units
M20 Key 1NC/1NO Glass Filled PET 600V 250V 1NC/1NO - - - 2 GKE - 30.5mm
RS Stock No. 755-7948
Mfr. Part No.3SE5234-0QV40-1AE0
BrandSiemens
TWD2,049.00
Each
units
M20 Key 2NC Plastic 230V 230V - Sirius - - 5 3SE5 2NC 33mm
RS Stock No. 814-7009
Mfr. Part No.XCSE7333
TWD20,298.00
Each
units
Cable Key 2NC/1NO Zamak 240V 250V 1NC/1NO Preventa Yes - 8 XCSE - 44mm
RS Stock No. 742-0748
Mfr. Part No.AZ 3350-12ZUEK
BrandSchmersal
TWD3,108.00
Each
units
Screw Key 2NC/1NO Aluminium 230V 24V 2NC - Yes - 4 AZ3350 1NO 38mm
RS Stock No. 133-0073
Mfr. Part No.XCSDMP70010
TWD3,682.00
Each
units
10m Pre-Cabled - - Plastic - - 3NC/NO Preventa Yes - - XCSDMP - 88mm
RS Stock No. 179-4727
Mfr. Part No.HS5D-03RNM
BrandIdec
TWD1,054.00
Each
units
M20 Handle 3NC Plastic (Head) 250V 30V 3NC - - Interlock - HS5D - 91mm
RS Stock No. 179-4736
Mfr. Part No.HS5D-12ZRN
BrandIdec
TWD1,271.00
Each
units
G1/2 Handle 1NO/2NC Metal (Head) 250V 30V 1NO+2NC - - Interlock - HS5D - 91mm
RS Stock No. 189-5315
Mfr. Part No.3911742391
TWD519.00
Each
units
- - - - - - - - - - - - - 40mm
RS Stock No. 179-4738
Mfr. Part No.HS5D-12ZRNP
BrandIdec
TWD1,271.00
Each
units
PG13.5 Handle 1NO/2NC Metal (Head) 250V 30V 1NO+2NC - - Interlock - HS5D - 91mm
RS Stock No. 549-574
Mfr. Part No.D4NS-9AF
BrandOmron
TWD3,367.00
Each
units
M12 Key 1NC/1NO Plastic 240V 250V 1NC/1NO - - - 4 D4NS - 30mm
RS Stock No. 179-4729
Mfr. Part No.HS5D-03RNP
BrandIdec
TWD1,054.00
Each
units
PG13.5 Handle 3NC Plastic (Head) 250V 30V 3NC - - Interlock - HS5D - 91mm
RS Stock No. 147-534
Mfr. Part No.GKMD03
BrandHoneywell
TWD2,643.00
Each
units
M12 Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 826-3906
Mfr. Part No.208007
BrandIDEM
TWD3,829.00
Each
units
M20 Key 3NC/1NO Stainless Steel 240V - 3NC Kobra - - 4 K-SS 1NO 37.5mm
RS Stock No. 263-3602
Mfr. Part No.XCSA512
TWD3,777.00
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 826-3886
Mfr. Part No.208019
BrandIDEM
TWD9,408.00
Each
units
Cable Key 2NC Stainless Steel 240V - 2NC Kobra - - 4 K-SS-Ex - 37.5mm
RS Stock No. 814-7012
Mfr. Part No.XCSMP70L2
TWD6,108.00
Each
units
Cable Key 2NC/1NO Polyamide 240V 250V - Preventa Yes - 1 XCSMP - 30mm