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. 187-5359
Mfr. Part No.191759
BrandEaton
HK$1,719.73
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 32 A 400 V 230 V ac @ 50 Hz, 240 V ac @ 60 Hz Screw 56mm 138mm 85mm
RS Stock No. 187-5346
Mfr. Part No.191736
BrandEaton
HK$989.14
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 18 A 400 V 110 V ac @ 50 Hz, 120 V ac @ 60 Hz Screw 56mm 138mm 85mm
RS Stock No. 187-5350
Mfr. Part No.191744
BrandEaton
HK$970.43
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 25 A 400 V 230 V ac @ 50 Hz, 240 V ac @ 60 Hz Screw 56mm 138mm 85mm
RS Stock No. 175-3231
Mfr. Part No.1SBL367082R1122
BrandABB Jokab
HK$2,200.12
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 100 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 55mm 144mm 119.5mm
RS Stock No. 187-5332
Mfr. Part No.191740
BrandEaton
HK$481.59
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. 187-5354
Mfr. Part No.191725
BrandEaton
HK$1,847.92
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 25 A 400 V 24 → 27 V dc Screw 56mm 138mm 85mm
RS Stock No. 187-5331
Mfr. Part No.191701
BrandEaton
HK$481.59
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 7 A 400 V 110 V ac @ 50 Hz, 120 V ac @ 60 Hz Screw 45mm 117mm 68mm
RS Stock No. 175-3233
Mfr. Part No.1SBL387082R1122
BrandABB Jokab
HK$2,554.98
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 105 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 55mm 144mm 119.5mm
RS Stock No. 187-5330
Mfr. Part No.191720
BrandEaton
HK$805.43
Each
units
- - - DILAS - 8 4NO/4NC 4 A 415 V 24 V dc Screw 45mm 117mm 68mm
RS Stock No. 187-5329
Mfr. Part No.191753
BrandEaton
HK$733.86
Each
units
- - - DILAS - 8 4NO/4NC 4 A 415 V 230 V ac @ 50 Hz, 240 V ac @ 60 Hz Screw 45mm 117mm 68mm
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