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. 711-6335
Mfr. Part No.CC4-01
BrandABB
HK$112.51
Each
units
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw -40°C +70°C -40 → +70 °C CC4 - -
RS Stock No. 467-5490
Mfr. Part No.1SDA051370R1
BrandABB
HK$423.04
Each
units
1 NO/NC - - - - SPDT - - - - TMAX - -
RS Stock No. 445-8043
Mfr. Part No.1SBN010040R1122 - CA5-22M
BrandABB
HK$165.25
Each
units
4 2NO/2NC - Front Mount 6 A 24 V dc, 230 V ac 4P Screw - - - CA5 - -
RS Stock No. 711-6339
Mfr. Part No.CAT4-11E
BrandABB
HK$79.84
Each
units
2 NO/NC - Front Mount 6 A 600 V dc, 690 V ac DP Screw - - - CAT4 - -
RS Stock No. 512-9516
Mfr. Part No.OA3G01
BrandABB
HK$69.35
Each
units
- - - - - - - - - - - - - -
RS Stock No. 711-6367
Mfr. Part No.CA4-13M
BrandABB
HK$133.21
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. 460-1499
Mfr. Part No.GHS2701916R0002 - S2-H20
BrandABB
HK$176.75
Each
units
2 2NO - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - HSMS - -
RS Stock No. 183-3782
Mfr. Part No.359624
BrandABB
HK$404.53
Each
units
2 NC/NO - DIN Rail Mount 10 A 24 V ac/dc - - - - - S2C - -
RS Stock No. 614-0851
Mfr. Part No.2CDS200970R0002
BrandABB
HK$144.26
Each
units
1 NO - - 2 A 50 V dc, 230 V ac SP - - - - - - -
RS Stock No. 445-8093
Mfr. Part No.GHE3401321R0001
BrandABB
HK$203.00
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. 445-0443
Mfr. Part No.1SAM201902R1002
BrandABB
HK$80.12
Each
units
2 2NO - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - HK1 - -
RS Stock No. 445-8021
Mfr. Part No.1SBN010010R1001
BrandABB
HK$39.52
Each
units
1 NC - Front Mount - - SP Screw - - - CA5 - -
RS Stock No. 445-8166
Mfr. Part No.GJL1201330R0003 - CAF6-11M
BrandABB
HK$69.61
Each
units
2 NO/NC - Front Mount - 240 V dc, 500 V ac DP Screw - - - B6 - -
RS Stock No. 183-3645
Mfr. Part No.359625
BrandABB
HK$381.60
Each
units
2 2NO - DIN Rail Mount 10 A 24 V ac/dc - - - - - S2C - -
RS Stock No. 183-3710
Mfr. Part No.470901
BrandABB
HK$461.35
Each
units
1 - - DIN Rail Mount - - - - - - - SN201 - -
RS Stock No. 711-6382
Mfr. Part No.CA4-40U
BrandABB
HK$132.34
Each
units
4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS Stock No. 455-5829
Mfr. Part No.GHS2701916R0001 - S2-H11
BrandABB
HK$176.23
Each
units
2 NO/NC - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - HSMS - -
RS Stock No. 727-1549
Mfr. Part No.1SCA022353R4890
BrandABB
HK$69.35
Each
units
1 NC - Snap-On 6 A ac, 10 A dc 400 V dc, 690 V ac SP Screw - - - OA1G - -
RS Stock No. 445-7983
Mfr. Part No.GHE3401321R0002
BrandABB
HK$185.12
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. 711-6323
Mfr. Part No.1SBN010110T1001
BrandABB
HK$36.98
Each
units
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -