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 Number of Timing Ranges External Dimensions
RS Stock No. 445-0421
Mfr. Part No.1SAM201902R1001
BrandABB
PHP656.83
Each
units
2 NO/NC - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - HK1 - -
RS Stock No. 488-6448
Mfr. Part No.S2C-S/H6R
BrandABB
PHP1,768.40
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. 711-6351
Mfr. Part No.CA4-04E
BrandABB
PHP1,196.39
Each
units
4 4NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS Stock No. 711-6354
Mfr. Part No.CA4-22E
BrandABB
PHP1,196.39
Each
units
4 2NO/2NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS Stock No. 445-8043
Mfr. Part No.1SBN010040R1122 - CA5-22M
BrandABB
PHP1,300.32
Each
units
4 2NO/2NC - Front Mount 6 A 24 V dc, 230 V ac 4P Screw - - - CA5 - -
RS Stock No. 800-7286
Mfr. Part No.1SFN010820R1011
BrandABB
PHP1,310.82
Each
units
4 NC, NO - Side Mount 6 A 690 V ac DP Screw - - - CAL19 - -
RS Stock No. 435-421
Mfr. Part No.2CCS800900R0021
BrandABB
PHP2,926.12
Each
units
2 2NO/2NC - DIN Rail Mount 4 A dc, 6 A ac 250 V dc, 400 V ac DPDT Screw -25°C +60°C -25 → +60 °C S800 - -
RS Stock No. 445-8021
Mfr. Part No.1SBN010010R1001
BrandABB
PHP275.70
Each
units
1 NC - Front Mount - - SP Screw - - - CA5 - -
RS Stock No. 711-6341
Mfr. Part No.CAT4-11U
BrandABB
PHP721.86
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw - - - CAT4 - -
RS Stock No. 445-8188
Mfr. Part No.CAF6-02M
BrandABB
PHP522.06
Each
units
2 2NC - Front Mount 12 A 240 V dc, 500 V ac DP Screw - - - CAF6 - -
RS Stock No. 711-6323
Mfr. Part No.1SBN010110T1001
BrandABB
PHP334.34
Each
units
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -
RS Stock No. 711-6339
Mfr. Part No.CAT4-11E
BrandABB
PHP721.86
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw - - - CAT4 - -
RS Stock No. 711-6326
Mfr. Part No.1SBN010110T1010
BrandABB
PHP334.34
Each
units
- 1NO AF Range - 6 A 600 V dc, 690 V ac - Screw - - - CA4 - -
RS Stock No. 711-6382
Mfr. Part No.CA4-40U
BrandABB
PHP1,196.39
Each
units
4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS Stock No. 445-0415
Mfr. Part No.1SAM201901R1001
BrandABB
PHP639.84
Each
units
2 NO/NC - Front Mount 1 A dc, 3 A ac 220 V dc, 230 V ac DP - - - - HK1 - -
RS Stock No. 456-0253
Mfr. Part No.1SBN010020R1011
BrandABB
PHP918.44
Each
units
2 NO/NC - Side Mount - - DP Screw - - - CAL5 - -
RS Stock No. 711-6345
Mfr. Part No.CA4-40E
BrandABB
PHP1,196.39
Each
units
4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS Stock No. 711-6329
Mfr. Part No.1SBN010110R1001
BrandABB
PHP334.80
Each
units
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -
RS Stock No. 445-7983
Mfr. Part No.GHE3401321R0002
BrandABB
PHP1,673.34
Each
units
2 NO/NC - DIN Rail Mount - 220 V dc, 400 V ac DP Screw -25°C +55°C -25 → +55 °C ESB - -
RS Stock No. 488-7384
Mfr. Part No.2CDS200912R0001
BrandABB
PHP1,486.42
Each
units
2 NO/NC - Side Mount - - DP Screw - - - - - -