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. 782-3049
Mfr. Part No.PRDA-11AGA-120
SGD111.51
Each
units
- - DPDT PRD - - - 30 A - 120 V ac - - - -
RS Stock No. 782-3009
Mfr. Part No.P40P42D12P1-24
SGD171.86
Each
units
- - 3PST P40 NO - - 40 A - 24 V dc - - - -
New
RS Stock No. 187-5331
Mfr. Part No.191701
BrandEaton
SGD90.17
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
New
RS Stock No. 187-5342
Mfr. Part No.191722
BrandEaton
SGD150.81
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 9 A 400 V 24 V dc Screw 45mm 117mm 68mm
RS Stock No. 175-3212
Mfr. Part No.1SBL236082R3022
BrandABB Jokab
SGD197.07
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 45 A 600 V ac 24 V dc Screw 45mm 119.5mm 80mm
RS Stock No. 175-3207
Mfr. Part No.1SBL157082R1322
BrandABB Jokab
SGD107.38
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 28 A 600 V ac 100 → 250 V @ 50/60 Hz, 100 → 250 V dc Screw 45mm 110.5mm 80mm
New
RS Stock No. 187-5337
Mfr. Part No.191702
BrandEaton
SGD96.68
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. 175-3201
Mfr. Part No.1SBL137082R1122
BrandABB Jokab
SGD137.05
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. 175-3226
Mfr. Part No.1SBL297082R1322
BrandABB Jokab
SGD255.43
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 50 A 600 V ac 100 → 250 V @ 50/60 Hz, 100 → 250 V dc Screw 45mm 119.5mm 80mm
RS Stock No. 175-3225
Mfr. Part No.1SBL297082R1122
BrandABB Jokab
SGD263.74
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 50 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 45mm 119.5mm 80mm
RS Stock No. 175-3199
Mfr. Part No.1SBL136082R3022
BrandABB Jokab
SGD137.05
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 25 A 600 V ac 24 V dc Screw 45mm 110.5mm 80mm
New
RS Stock No. 187-5343
Mfr. Part No.191704
BrandEaton
SGD130.24
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. 175-3220
Mfr. Part No.1SBL277082R1322
BrandABB Jokab
SGD220.12
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 50 A 600 V ac 100 → 250 V @ 50/60 Hz, 100 → 250 V dc Screw 45mm 119.5mm 80mm
RS Stock No. 175-3218
Mfr. Part No.1SBL276082R3022
BrandABB Jokab
SGD226.36
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 50 A 600 V ac 24 V dc Screw 45mm 119.5mm 80mm
RS Stock No. 175-3213
Mfr. Part No.1SBL237082R1122
BrandABB Jokab
SGD197.07
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 45 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 45mm 119.5mm 80mm
RS Stock No. 766-1891
Mfr. Part No.3TK2850-1AJ20
BrandSiemens
SGD348.00
Each
units
- SIRIUS 3P 3TK28 3NO - - 10 A 600 V ac 115 V ac Screw 132mm 90mm 108mm
New
RS Stock No. 187-5357
Mfr. Part No.191712
BrandEaton
SGD342.01
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 32 A 400 V 24 → 27 V dc Screw 56mm 138mm 85mm
New
RS Stock No. 187-5352
Mfr. Part No.191737
BrandEaton
SGD234.00
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 25 A 400 V 110 V ac @ 50 Hz, 120 V ac @ 60 Hz Screw 56mm 138mm 85mm
New
RS Stock No. 187-5346
Mfr. Part No.191736
BrandEaton
SGD185.21
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
New
RS Stock No. 187-5359
Mfr. Part No.191759
BrandEaton
SGD322.00
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
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