Auxiliary Contacts

Contacts are the conductive pieces of material that form part of an electrically controlled switch. Auxiliary contacts form part of a contactor, which is a type of switch that can be controlled remotely.

Contactors are often used in very high-power circuits, and auxiliary contacts are the last phase of contact, used to reduce the power of the current. They have a lower current rating than regular power contacts, and can be used to de-energise the contactor.

How do auxiliary contacts work?

Auxiliary contacts are affixed to the main contacts and change state when the main contacts do. They pass the data from the circuit to a logic controller, which in turn gives instructions to the linked devices about whether to turn on or off.

Alternatively, they can be used as a standalone hardware control unit.

What are auxiliary contacts used for?

One common usage of auxiliary contacts is in push button controllers, where they can be built in to the start button.


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Description Price Number of Contacts Normal State Configuration Range Mounting Style Contact Current Rating Contact Voltage Rating Pole and Throw Configuration Terminal Type Minimum Operating Temperature Maximum Operating Temperature Operating Temperature Range CAD Drawing Series Number of Timing Ranges
RS stock no. 711-6379
Mfr. Part No.CA4-22U
BrandABB
R 306.89
Each
units
4 2NO/2NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS stock no. 467-5490
Mfr. Part No.1SDA051370R1
BrandABB
R 905.67
Each
units
1 NO/NC - - - - SPDT - - - - - TMAX -
RS stock no. 711-6357
Mfr. Part No.CA4-31E
BrandABB
R 306.83
Each
units
4 3NO/NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS stock no. 456-0253
Mfr. Part No.1SBN010020R1011
BrandABB
R 230.05
Each
units
2 NO/NC - Side Mount - - DP Screw - - - - CAL5 -
RS stock no. 711-6310
Mfr. Part No.1SBN010120R1011
BrandABB
R 195.03
Each
units
2 NO/NC - Side Mount 6 A 600 V dc, 690 V ac DP Screw -40°C +70°C -40 → +70 °C - CAL4-11 -
RS stock no. 445-8166
Mfr. Part No.GJL1201330R0003 - CAF6-11M
BrandABB
R 142.51
Each
units
2 NO/NC - Front Mount - 240 V dc, 500 V ac DP Screw - - - - B6 -
RS stock no. 445-0421
Mfr. Part No.1SAM201902R1001
BrandABB
R 185.80
Each
units
2 NO/NC - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - - HK1 -
RS stock no. 488-7384
Mfr. Part No.2CDS200912R0001
BrandABB
R 379.84
Each
units
2 NO/NC - Side Mount - - DP Screw - - - - - -
RS stock no. 445-0415
Mfr. Part No.1SAM201901R1001
BrandABB
R 185.04
Each
units
2 NO/NC - Front Mount 1 A dc, 3 A ac 220 V dc, 230 V ac DP - - - - - HK1 -
RS stock no. 445-8093
Mfr. Part No.GHE3401321R0001
BrandABB
R 366.38
Each
units
2 2NO - DIN Rail Mount 4 A 220 V dc, 400 V ac DP Screw -25°C +55°C -25 → +55 °C - ESB -
RS stock no. 482-4434
Mfr. Part No.1SCA022353R4970
BrandABB
R 153.31
Each
units
1 NO - - - - - - - - - - - -
RS stock no. 711-6398
Mfr. Part No.CA4-31N
BrandABB
R 306.83
Each
units
4 3NO/NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw -40°C +70°C -40 → +70 °C - CA4 -
RS stock no. 445-8021
Mfr. Part No.1SBN010010R1001
BrandABB
R 79.51
Each
units
1 NC - Front Mount - - SP Screw - - - - CA5 -
RS stock no. 488-6448
Mfr. Part No.S2C-S/H6R
BrandABB
R 451.50
Each
units
2 NO/NC - Side Mount 1.5 A dc, 6 A ac 110 V dc, 240 V ac DP Screw - - - - S2C -
RS stock no. 711-6345
Mfr. Part No.CA4-40E
BrandABB
R 307.01
Each
units
4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS stock no. 711-6348
Mfr. Part No.CAT4-11M
BrandABB
R 185.95
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw -40°C +70°C -40 → +70 °C - CAT4 -
RS stock no. 445-8043
Mfr. Part No.1SBN010040R1122 - CA5-22M
BrandABB
R 334.39
Each
units
4 2NO/2NC - Front Mount 6 A 24 V dc, 230 V ac 4P Screw - - - - CA5 -
RS stock no. 711-6351
Mfr. Part No.CA4-04E
BrandABB
R 306.89
Each
units
4 4NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS stock no. 711-6382
Mfr. Part No.CA4-40U
BrandABB
R 306.89
Each
units
4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS stock no. 512-9500
Mfr. Part No.OA4B01
BrandABB
R 241.81
Each
units
1 NC - Snap-On - - SP - - - - - - -