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. 147-483
Mfr. Part No.GKMA13
BrandHoneywell
kr 643,81
Each
Units
Cable Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 179-4748
Mfr. Part No.HS6B-03B05
BrandIdec
kr 804,82
Each
Units
Cable - 3NC - 250V 30V 3NC - - Interlock - HS6B - 87mm
RS Stock No. 179-4743
Mfr. Part No.HS5L-VA44M-G
BrandIdec
kr 1 626,14
Each
Units
M20 Key 1NC/1NO (Door Monitor), 1NC/1NO (Lock Monitor) Metal (Head) 250V 30V 1NC/1NO (Door Monitor), 1NC/1NO (Lock Monitor) - - Spring Lock - HS5L - 127mm
RS Stock No. 279-6393
Mfr. Part No.XCSTA591
kr 464,60
Each
Units
Screw Key 1NC/2NO Glass Fibre Reinforced PA 240V 250V 1NC/2NO Preventa - - 8 XCSTA - 30mm
RS Stock No. 133-0073
Mfr. Part No.XCSDMP70010
kr 800,59
Each
Units
10m Pre-Cabled - - Plastic - - 3NC/NO Preventa Yes - - XCSDMP - 88mm
RS Stock No. 153-141
Mfr. Part No.GKNC21
BrandHoneywell
kr 539,99
Each
Units
M20 Key 2NC/1NO Glass Filled PET 600V 250V 2NC/1NO - - - 4 GKN - 33mm
RS Stock No. 185-7254
Mfr. Part No.M-TS (B201)
BrandIDEM
kr 2 039,27
Each
Units
M6 Screw Key - Die Cast Metal, Stainless Steel - - - - - Interlock 2 M-TS - 109mm
RS Stock No. 251-2022
Mfr. Part No.440K-T11123
kr 605,13
Each
Units
M20 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 4 440K 1NO 52mm
RS Stock No. 179-4736
Mfr. Part No.HS5D-12ZRN
BrandIdec
kr 491,15
Each
Units
G1/2 Handle 1NO/2NC Metal (Head) 250V 30V 1NO+2NC - - Interlock - HS5D - 91mm
RS Stock No. 351-3975
Mfr. Part No.440K-T11147
kr 542,33
Each
Units
M20 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 - - 4 440K 1NO 52mm
RS Stock No. 277-2123
Mfr. Part No.440K-H11145
kr 2 651,82
Each
Units
M20 Key 2NC Glass Filled PBT 240V 250V 2NC Trojan 5-EX Yes - 4 440K - 52mm
RS Stock No. 549-574
Mfr. Part No.D4NS-9AF
BrandOmron
kr 527,00
Each
Units
M12 Key 1NC/1NO Plastic 240V 250V 1NC/1NO - - - 4 D4NS - 30mm
RS Stock No. 625-0504
Mfr. Part No.AZ 17-02ZRK
BrandSchmersal
kr 279,46
Each
Units
M16 Key 2NC Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 4 AZ17 - 30mm
RS Stock No. 754-8287
Mfr. Part No.3SE5122-3QV10
BrandSiemens
kr 1 126,61
Each
Units
M20 Key 2NC/1NO Metal 230V 230V 2NC Sirius - - 5 3SE5 1NO 37.8mm
RS Stock No. 183-6020
Mfr. Part No.440T-MRKSE110C
kr 2 877,12
Each
Units
M4 Key 2NC, 2NO Stainless Steel - - 2NC, 2NO - Yes Interlock - 440T 2NC, 2NO 143mm
RS Stock No. 498-911
Mfr. Part No.3SE5112-0QV10
BrandSiemens
kr 888,33
Each
Units
M20 Key 2NC/1NO Metal 230V 230V - Sirius - - 5 3SE5 2NC/1NO 37.3mm
RS Stock No. 185-7255
Mfr. Part No.M-HS (B201)
BrandIDEM
kr 1 812,98
Each
Units
M6 Screw Key - Die Cast Metal, Stainless Steel - - - - Yes Interlock - M-HS - 109mm
RS Stock No. 179-4741
Mfr. Part No.HS5L-DD44M-G
BrandIdec
kr 1 628,20
Each
Units
M20 Key 1NC/1NC Metal (Head) 250V 30V 1NC+1NC - - Spring Lock - HS5L - 127mm
RS Stock No. 623-3048
Mfr. Part No.AZ16-02ZVRK-M20-2254
BrandSchmersal
kr 265,03
Each
Units
M20 Key 2NC Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 - 30mm
RS Stock No. 185-7263
Mfr. Part No.M-BS (A102)
BrandIDEM
kr 1 644,90
Each
Units
M6 Screw Key - Die Cast Metal, Stainless Steel - - - - Yes Interlock - M-BS - 109mm
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