Safety Contactors

Safety contactors are a type of safety relay, designed to ensure that if there is a fault either externally or within a device, the circuit will remain safe. They monitor functions in the circuit and react to faults, often by stopping or preventing the movement of parts.

How do safety contactors work?

Safety contactors are devices used for risk reduction in industrial settings. They work by switching the power in an electronic circuit, usually by breaking the circuit with electrical contacts. When a fault is detected, they will isolate the function they are monitoring, preventing it from continuing to work.

Each safety contactor measures a specific function, and there is usually a whole network of interconnected safety contactors working together to minimise risk.

Types of safety contactors

Safety contacts can vary by design in a number of different ways. This includes the number of contacts, their current and voltage rating, and their dimensions, which can vary quite significantly.


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Description Price Number of Contacts Range Pole and Throw Configuration Series Normal State Configuration Number Of Auxiliary Contacts Auxiliary Contacts Contact Current Rating Contact Voltage Rating Coil Voltage Terminal Type Length Width Depth
RS Stock No. 175-3237
Mfr. Part No.1SBL397082R1122
BrandABB Jokab
SGD519.91
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 125 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 70mm 149mm 119.5mm
RS Stock No. 187-5355
Mfr. Part No.191706
BrandEaton
SGD235.20
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 32 A 400 V 110 V ac @ 50 Hz, 120 V ac @ 60 Hz Screw 56mm 138mm 85mm
RS Stock No. 187-5335
Mfr. Part No.191754
BrandEaton
SGD131.60
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 7 A 400 V 230 V ac @ 50 Hz, 240 V ac @ 60 Hz Screw 45mm 117mm 68mm
RS Stock No. 175-3215
Mfr. Part No.1SBL237082R1322
BrandABB Jokab
SGD142.58
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 45 A 600 V ac 100 → 250 V dc, 100 → 250 V @ 50/60 Hz Screw 45mm 119.5mm 80mm
RS Stock No. 187-5341
Mfr. Part No.191755
BrandEaton
SGD138.61
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 9 A 400 V 230 V ac @ 50 Hz, 240 V ac @ 60 Hz Screw 45mm 117mm 68mm
RS Stock No. 187-5348
Mfr. Part No.191724
BrandEaton
SGD294.00
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 18 A 400 V 24 → 27 V dc Screw 56mm 138mm 85mm
RS Stock No. 175-3201
Mfr. Part No.1SBL137082R1122
BrandABB Jokab
SGD126.17
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 25 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 45mm 110.5mm 80mm
RS Stock No. 187-5340
Mfr. Part No.191734
BrandEaton
SGD138.61
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 9 A 400 V 110 V ac @ 50 Hz, 120 V ac @ 60 Hz Screw 45mm 117mm 68mm
RS Stock No. 187-5351
Mfr. Part No.191711
BrandEaton
SGD262.41
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 25 A 400 V 24 → 27 V dc Screw 56mm 138mm 85mm
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