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 Series External Width External Dimensions
RS Stock No. 445-0415
Mfr. Part No.1SAM201901R1001
BrandABB
SGD21.67
Each
units
2 NO/NC - Front Mount 1 A dc, 3 A ac 220 V dc, 230 V ac DP - - - - HK1 - -
RS Stock No. 467-5490
Mfr. Part No.1SDA051370R1
BrandABB
SGD106.19
Each
units
1 NO/NC - - - - SPDT - - - - TMAX - -
RS Stock No. 711-6354
Mfr. Part No.CA4-22E
BrandABB
SGD32.89
Each
units
4 2NO/2NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS Stock No. 456-0253
Mfr. Part No.1SBN010020R1011
BrandABB
SGD26.70
Each
units
2 NO/NC - Side Mount - - DP Screw - - - CAL5 - -
RS Stock No. 488-6448
Mfr. Part No.S2C-S/H6R
BrandABB
SGD48.29
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. 711-6332
Mfr. Part No.CC4-10
BrandABB
SGD26.97
Each
units
1 NO - Front Mount 6 A 600 V dc, 690 V ac SP Screw -40°C +70°C -40 → +70 °C EF14 - -
RS Stock No. 482-4434
Mfr. Part No.1SCA022353R4970
BrandABB
SGD16.95
Each
units
1 1NO - - - - - - - - - - - -
RS Stock No. 445-8043
Mfr. Part No.1SBN010040R1122 - CA5-22M
BrandABB
SGD55.59
Each
units
4 2NO/2NC - Front Mount 6 A 24 V dc, 230 V ac 4P Screw - - - CA5 - -
RS Stock No. 711-6310
Mfr. Part No.1SBN010120R1011
BrandABB
SGD23.71
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. 488-7384
Mfr. Part No.2CDS200912R0001
BrandABB
SGD40.58
Each
units
2 NO/NC - Side Mount - - DP Screw - - - - - -
RS Stock No. 711-6360
Mfr. Part No.CA4-22M
BrandABB
SGD21.17
Each
units
4 2NO/2NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw -40°C +70°C -40 → +70 °C CA4 - -
RS Stock No. 711-6317
Mfr. Part No.1SBN010110R1010
BrandABB
SGD10.37
Each
units
1 NO - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -
RS Stock No. 711-6348
Mfr. Part No.CAT4-11M
BrandABB
SGD19.14
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. 460-1506
Mfr. Part No.GHS2701916R0003 - S2-H02
BrandABB
SGD37.69
Each
units
2 2NC - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - HSMS - -
RS Stock No. 445-8021
Mfr. Part No.1SBN010010R1001
BrandABB
SGD6.52
Each
units
1 NC - Front Mount - - SP Screw - - - CA5 - -
RS Stock No. 711-6398
Mfr. Part No.CA4-31N
BrandABB
SGD31.71
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. 711-6339
Mfr. Part No.CAT4-11E
BrandABB
SGD19.14
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw - - - CAT4 - -
RS Stock No. 445-8093
Mfr. Part No.GHE3401321R0001
BrandABB
SGD44.36
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. 711-6367
Mfr. Part No.CA4-13M
BrandABB
SGD28.12
Each
units
4 NO/3NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw -40°C +70°C -40 → +70 °C CA4 - -
RS Stock No. 711-6345
Mfr. Part No.CA4-40E
BrandABB
SGD31.71
Each
units
4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -