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. 337-3799
Mfr. Part No.GKBC1L7
BrandHoneywell
£104.88
Each
Units
M20 Key 1NC/1NO Glass Filled PET 600V 250V 1NC - Yes - 2 GKB 1NO 42.6mm
RS Stock No. 147-483
Mfr. Part No.GKMA13
BrandHoneywell
£59.38
Each
Units
Cable Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 147-556
Mfr. Part No.GKMB16
BrandHoneywell
£48.87
Each
Units
Cable Key 2NC Glass Filled PET 50V 50V 2NC - - - 2 GKM - 16mm
RS Stock No. 147-512
Mfr. Part No.GKMB13
BrandHoneywell
£51.78
Each
Units
Cable Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 147-506
Mfr. Part No.GKMB39
BrandHoneywell
£60.84
Each
Units
Cable Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 820-3500
Mfr. Part No.GKMA33
BrandHoneywell
£54.28
Each
Units
Cable Key 1NC/1NO Glass Filled PET 240V 250V - - Yes - 2 GKM - 16mm
RS Stock No. 843-5690
Mfr. Part No.GKMD06
BrandHoneywell
£363.73
1 Pack of 5
Pack(s)
Cable Key 2NC Glass Filled PET 50V 50V - - Yes - 2 GKM - 16mm
RS Stock No. 153-286
Mfr. Part No.GKNC30
BrandHoneywell
£28.28
Each
Units
M20 Key 3NC Glass Filled PET 600V 250V 3NC - - - 4 GKN - 33mm
RS Stock No. 147-499
Mfr. Part No.GKMC09
BrandHoneywell
£84.87
Each
Units
M12 Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 153-343
Mfr. Part No.GKEC06L
BrandHoneywell
£33.92
Each
Units
M20 Key 2NC Glass Filled PET 600V 250V 2NC - Yes - 2 GKE - 30.5mm
RS Stock No. 820-3519
Mfr. Part No.GKMC03
BrandHoneywell
£80.53
Each
Units
M12 Key 1NC/1NO Glass Filled PET 240V 250V - - Yes - 2 GKM - 16mm
RS Stock No. 337-3812
Mfr. Part No.GKCC1L6
BrandHoneywell
£159.62
Each
Units
M20 Key 1NC/1NO Glass Filled PET 600V 250V 1NC - Yes - 2 GKC 1NO 42.6mm
RS Stock No. 153-141
Mfr. Part No.GKNC21
BrandHoneywell
£49.80
Each
Units
M20 Key 2NC/1NO Glass Filled PET 600V 250V 2NC/1NO - - - 4 GKN - 33mm
RS Stock No. 147-534
Mfr. Part No.GKMD03
BrandHoneywell
£58.78
Each
Units
M12 Key 1NC/1NO Glass Filled PET 50V 50V 1NC/1NO - - - 2 GKM - 16mm
RS Stock No. 820-3507
Mfr. Part No.GKMB33
BrandHoneywell
£51.48
Each
Units
Cable Key 1NC/1NO Glass Filled PET 240V 250V - - Yes - 2 GKM - 16mm
RS Stock No. 153-185
Mfr. Part No.GKEC03L
BrandHoneywell
£41.10
Each
Units
M20 Key 1NC/1NO Glass Filled PET 600V 250V 1NC/1NO - - - 2 GKE - 30.5mm