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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Omschrijving Prijs 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-stocknr. 623-3054
FabrikantnummerAZ16-12ZVRK-M20
FabrikantSchmersal
34,10 €
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M20 Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 1NO 30mm
RS-stocknr. 625-0330
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29,45 €
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M20 Key 2NC Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 AZ16 - 30mm
RS-stocknr. 625-0374
FabrikantnummerAZ15ZVRK-M20
FabrikantSchmersal
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M20 Key 1NC Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ15 - 75mm
RS-stocknr. 410-7212
FabrikantnummerSKT-U1Z M3
FabrikantBernstein AG
29,60 €
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Screw Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 240V 250V 1NC/1NO - Yes - 4 SKT - 27mm
RS-stocknr. 873-2203
Fabrikantnummer440K-T11339
66,50 €
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M20 Key -, 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 8 440K 1NO 32mm
RS-stocknr. 436-5569
FabrikantnummerSKI-UV15Z M3
FabrikantBernstein AG
34,98 €
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Screw Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 240V - 1NC/1NO - Yes - 4 SKI - 30.5mm
RS-stocknr. 489-4887
Fabrikantnummer440K-E33041
37,50 €
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M16 Key 2NC Glass Filled PBT 600V 600V 2NC Elf Yes - 8 440K - 29mm
RS-stocknr. 263-3595
FabrikantnummerXCSA502
89,40 €
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Screw Key 1NC/2NO Zamak 240V 250V 1NC/2NO Preventa - - 8 XCSA - 44mm
RS-stocknr. 755-7935
Fabrikantnummer3SE5242-0QV40
FabrikantSiemens
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M20 Key 2NC/1NO Plastic 230V 230V 2NC Sirius - - 5 3SE5 1NO 33mm
RS-stocknr. 623-2988
FabrikantnummerAZ16ZVRK-M20
FabrikantSchmersal
29,45 €
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M20 Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ16 1NO 30mm
RS-stocknr. 426-4444
Fabrikantnummer440K-C21097
45,10 €
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M16 Key 3NC Glass Filled PBT 600V 600V 3NC Cadet 3 Yes - 8 440K - 30.4mm
RS-stocknr. 623-3004
FabrikantnummerAZ16ZVRK-M20-2254
FabrikantSchmersal
29,45 €
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Aantal stuks
M20 Key 1NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 1NC - - - 3 AZ16 1NO 30mm
RS-stocknr. 814-7006
FabrikantnummerXCSE7313
393,00 €
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Aantal stuks
Cable Key 2NC/1NO Zamak 240V 250V 1NC/1NO Preventa Yes - 8 XCSE - 44mm
RS-stocknr. 814-7009
FabrikantnummerXCSE7333
420,00 €
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Cable Key 2NC/1NO Zamak 240V 250V 1NC/1NO Preventa Yes - 8 XCSE - 44mm
RS-stocknr. 698-8723
FabrikantnummerEX-AZ16-12ZVRK-M20-3D
FabrikantSchmersal
65,37 €
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Aantal stuks
Screw Key 2NC/1NO Glass Fibre Reinforced Thermoplastic 230V 24V 2NC - - - 3 EX-AZ16 1NO 30mm
RS-stocknr. 426-4517
Fabrikantnummer440K-T11305
42,90 €
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M20 Key 1NC/1NO Glass Filled PBT 600V 600V 1NC Trojan T15 Yes - 4 440K 1NO 52mm
RS-stocknr. 330-0729
Fabrikantnummer440K-T11131
95,60 €
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M20 Key 2NC/1NO Glass Filled PBT 500V 250V 2NC Trojan 5 - - 4 440K 1NO 95mm
RS-stocknr. 826-3886
Fabrikantnummer208019
FabrikantIDEM
266,78 €
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Aantal stuks
Cable Key 2NC Stainless Steel 240V - 2NC Kobra - - 4 K-SS-Ex - 37.5mm
RS-stocknr. 744-8660
Fabrikantnummer570220
FabrikantPilz
31,33 €
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Screw Key 2NC Glass Fibre Reinforced Thermoplastic 240V - 2NC PSENmech Yes - 4 - - 33mm
RS-stocknr. 378-1645
Fabrikantnummer440K-MT55001
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M20 Key 2NC/1NO Painted Zinc 500V 250V 2NC MT-GD2 - - 8 440K 1NO 116.5mm
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