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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Beskrivning Pris 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
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M20 Key 2NC/1NO Painted Zinc 500V 250V 2NC MT-GD2 - - 8 440K 1NO 116.5mm
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Tillv. art.nr440K-T11467
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M20 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 4 440K 1NO 52mm
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Tillv. art.nr440K-B04025
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M20 Key 2NC/1NO Metal 500V 250V 2NC Centurion Yes - 1 440K 1NO 40.5mm
RS-artikelnummer 183-6015
Tillv. art.nr440T-MDALE100C0D
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Screw Key - Stainless Steel - - - - Yes Interlock - 440T - 27.4mm
RS-artikelnummer 873-2247
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M12 Key 2NC/1NO Glass Filled PBT 600V 24V 2NC Cadet 3 Yes - 8 440K 1NO 30.4mm
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M20 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 8 440K 1NO 32mm
RS-artikelnummer 351-3975
Tillv. art.nr440K-T11147
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M20 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 - - 4 440K 1NO 52mm
RS-artikelnummer 183-6016
Tillv. art.nr440T-MKEXE110A0B0B
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- Key - Stainless Steel - - - - - Interlock - 440T - 90mm
RS-artikelnummer 378-1651
Tillv. art.nr440K-MT55002
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M20 Key 3NC/1NO Painted Zinc 120V 120V 3NC MT-GD2 - - 8 440K 1NO 40mm
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Tillv. art.nr440T-MSALE100I
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- - - - - - - - - - - - - -
RS-artikelnummer 394-7457
Tillv. art.nr440T-MSALE100A
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M5 Key - Stainless Steel - - - Prosafe Yes - 1 440T - 34mm
RS-artikelnummer 183-6020
Tillv. art.nr440T-MRKSE110C
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M4 Key 2NC, 2NO Stainless Steel - - 2NC, 2NO - Yes Interlock - 440T 2NC, 2NO 143mm
RS-artikelnummer 792-3089
Tillv. art.nr440K-T11338
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M20 Key 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 4 440K 1NO 52mm
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Tillv. art.nr440K-T11339
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M20 Key -, 2NC/1NO Glass Filled PBT 240V 24V 2NC Trojan 5 Yes - 8 440K 1NO 32mm