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. 766-1936
Mfr. Part No.3TK2852-1BB40
BrandSiemens
R 4,450.00
Each
units
- SIRIUS 6P 3TK28 6NO/NC - - 10 A 600 V ac 24 V dc Screw 132mm 90mm 146mm
RS stock no. 766-1918
Mfr. Part No.3TK2851-1AL20
BrandSiemens
R 4,060.00
Each
units
- SIRIUS 2P 3TK28 2NO/NC - - 10 A 600 V ac 230 V ac Screw 132mm 90mm 108mm
RS stock no. 782-3049
Mfr. Part No.PRDA-11AGA-120
R 1,156.96
Each
units
- - DPDT PRD - - - 30 A - 120 V ac - - - -
RS stock no. 187-5338
Mfr. Part No.191741
BrandEaton
R 877.04
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. 187-5332
Mfr. Part No.191740
BrandEaton
R 819.21
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. 175-3209
Mfr. Part No.1SBL177082R1122
BrandABB Jokab
R 1,584.16
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 30 A 600 V ac 20 → 60 V dc, 24 → 60 V @ 50/60 Hz Screw 45mm 110.5mm 80mm
RS stock no. 187-5339
Mfr. Part No.191762
BrandEaton
R 1,137.69
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 9 A 400 V 24 V dc Screw 45mm 117mm 68mm
RS stock no. 175-3215
Mfr. Part No.1SBL237082R1322
BrandABB Jokab
R 1,492.18
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 45 A 600 V ac 100 → 250 V @ 50/60 Hz, 100 → 250 V dc Screw 45mm 119.5mm 80mm
RS stock no. 187-5347
Mfr. Part No.191757
BrandEaton
R 1,675.31
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 18 A 400 V 230 V ac @ 50 Hz, 240 V ac @ 60 Hz Screw 56mm 138mm 85mm
RS stock no. 187-5343
Mfr. Part No.191704
BrandEaton
R 1,187.02
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. 187-5354
Mfr. Part No.191725
BrandEaton
R 3,112.42
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 25 A 400 V 24 → 27 V dc Screw 56mm 138mm 85mm
RS stock no. 175-3218
Mfr. Part No.1SBL276082R3022
BrandABB Jokab
R 1,880.43
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. 175-3231
Mfr. Part No.1SBL367082R1122
BrandABB Jokab
R 3,737.10
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. 175-3238
Mfr. Part No.1SBL397082R1322
BrandABB Jokab
R 5,444.26
Each
units
3 - 3P AFS 3NO 4 2NO/2NC 125 A 600 V ac 100 → 250 V @ 50/60 Hz, 100 → 250 V dc Screw 70mm 149mm 119.5mm
RS stock no. 175-3212
Mfr. Part No.1SBL236082R3022
BrandABB Jokab
R 1,906.16
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. 187-5334
Mfr. Part No.191733
BrandEaton
R 1,187.22
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. 187-5331
Mfr. Part No.191701
BrandEaton
R 819.21
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. 175-3207
Mfr. Part No.1SBL157082R1322
BrandABB Jokab
R 1,038.63
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
RS stock no. 187-5342
Mfr. Part No.191722
BrandEaton
R 1,363.43
Each
units
3 - 3P DILMS 3NO 5 2NO/3NC 9 A 400 V 24 V dc Screw 45mm 117mm 68mm
RS stock no. 175-3237
Mfr. Part No.1SBL397082R1122
BrandABB Jokab
R 5,446.59
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