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. 263-3624
Mfr. Part No.XCSA702
HK$737.18
Each
units
Screw Key 2NC/1NO Zamak 240V 250V 2NC/1NO Preventa - - 8 XCSA - 44mm
RS Stock No. 623-2972
Mfr. Part No.AZ15ZVRK-M20-2254
BrandSchmersal
HK$275.06
Each
units
M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS Stock No. 153-141
Mfr. Part No.GKNC21
BrandHoneywell
HK$653.33
Each
units
M20 Key 2NC/1NO Glass Filled PET 600V 250V 2NC/1NO - - - 4 GKN - 33mm
RS Stock No. 625-0374
Mfr. Part No.AZ15ZVRK-M20
BrandSchmersal
HK$222.92
Each
units
M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS Stock No. 623-2988
Mfr. Part No.AZ16ZVRK-M20
BrandSchmersal
HK$293.91
Each
units
M20 Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ16 1NO 30mm
RS Stock No. 826-3915
Mfr. Part No.203007F
BrandIDEM
HK$508.74
Each
units
M20 Key 3NC/1NO Die Cast Metal 240V - 3NC Kobra Yes - 4 KM 1NO 43.5mm
RS Stock No. 623-3098
Mfr. Part No.AZ 17-11ZK
BrandSchmersal
HK$331.62
Each
units
M16 Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 4 AZ17 1NO 30mm
RS Stock No. 279-6393
Mfr. Part No.XCSTA591
HK$313.14
Each
units
Screw Key 1NC/2NO Glass Fibre Reinforced PA 240V 250V 1NC/2NO Preventa - - 8 XCSTA - 30mm
RS Stock No. 623-3054
Mfr. Part No.AZ16-12ZVRK-M20
BrandSchmersal
HK$346.01
Each
units
M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 1NO 30mm
RS Stock No. 666-4938
Mfr. Part No.XCSA502EX
HK$2,093.52
Each
units
Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS Stock No. 826-3892
Mfr. Part No.204026
BrandIDEM
HK$2,627.77
Each
units
Cable Key 2NC/2NO Stainless Steel 250V 250V 2NC/1NO Kobra - - 8 KM-SS-Ex 1NO 44mm
RS Stock No. 179-4726
Mfr. Part No.HS5D-03RN
BrandIdec
HK$252.94
Each
units
G1/2 Handle 3NC Plastic (Head) 250V 30V 3NC - - Interlock - HS5D - 91mm
RS Stock No. 153-185
Mfr. Part No.GKEC03L
BrandHoneywell
HK$472.42
Each
units
M20 Key 1NC/1NO Glass Filled PET 600V 250V 1NC/1NO - - - 2 GKE - 30.5mm
RS Stock No. 179-4735
Mfr. Part No.HS5D-12RNP
BrandIdec
HK$252.94
Each
units
PG13.5 Handle 1NO/2NC Plastic (Head) 250V 30V 1NO+2NC - - Interlock - HS5D - 91mm
RS Stock No. 189-5315
Mfr. Part No.3911742391
HK$132.02
Each
units
- - - - - - - - - - - - - 40mm
RS Stock No. 305-1966
Mfr. Part No.XCSPA791
HK$316.35
Each
units
Screw Key 2NC Glass Fibre Reinforced PA 240V 250V - Preventa - - 8 XCSPA - 30mm
RS Stock No. 814-7003
Mfr. Part No.XCSMP59L2
HK$883.09
Each
units
Pre-Cabled Key NO/NC Polyamide 240V 250V - Preventa Yes - - XCSM - 30mm
RS Stock No. 189-5316
Mfr. Part No.3911742392
HK$52.85
Each
units
- - - - - - - - - - - - - 15mm
RS Stock No. 549-574
Mfr. Part No.D4NS-9AF
BrandOmron
HK$966.42
Each
units
M12 Key 1NC/1NO Plastic 240V 250V 1NC/1NO - - - 4 D4NS - 30mm
RS Stock No. 498-921
Mfr. Part No.3SE5232-0RV40
BrandSiemens
HK$345.17
Each
units
M20 Key 1NC/1NO Plastic 230V 230V - Sirius - - 5 3SE5 NC/NO 33mm