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 External Dimensions
RS Stock No. 711-6354
Mfr. Part No.CA4-22E
BrandABB
€18.26
Each
units
4 2NO/2NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS Stock No. 445-8188
Mfr. Part No.CAF6-02M
BrandABB
€8.93
Each
units
2 2NC - Front Mount 12 A 240 V dc, 500 V ac DP Screw - - - - CAF6 -
RS Stock No. 482-4434
Mfr. Part No.1SCA022353R4970
BrandABB
€9.11
Each
units
1 NO - - - - - - - - - - - -
RS Stock No. 455-5829
Mfr. Part No.GHS2701916R0001 - S2-H11
BrandABB
€19.18
Each
units
2 NO/NC - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - - HSMS -
RS Stock No. 711-6310
Mfr. Part No.1SBN010120R1011
BrandABB
€11.59
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
€22.68
Each
units
2 NO/NC - Side Mount - - DP Screw - - - - - -
RS Stock No. 488-6448
Mfr. Part No.S2C-S/H6R
BrandABB
€26.99
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. 460-1499
Mfr. Part No.GHS2701916R0002 - S2-H20
BrandABB
€19.26
Each
units
2 2NO - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - - HSMS -
RS Stock No. 467-5490
Mfr. Part No.1SDA051370R1
BrandABB
€61.14
Each
units
1 NO/NC - - - - SPDT - - - - - TMAX -
RS Stock No. 445-7983
Mfr. Part No.GHE3401321R0002
BrandABB
€25.54
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. 445-0443
Mfr. Part No.1SAM201902R1002
BrandABB
€11.05
Each
units
2 2NO - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - - HK1 -
RS Stock No. 445-8093
Mfr. Part No.GHE3401321R0001
BrandABB
€25.54
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. 800-7295
Mfr. Part No.1SFN010820R3311
BrandABB
€23.53
Each
units
4 NC, NO - Side Mount 6 A 690 V ac DP Screw - - - - CAL19 -
RS Stock No. 445-0421
Mfr. Part No.1SAM201902R1001
BrandABB
€11.58
Each
units
2 NO/NC - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - - HK1 -
RS Stock No. 711-6329
Mfr. Part No.1SBN010110R1001
BrandABB
€5.11
Each
units
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - - CA4 -
RS Stock No. 711-6317
Mfr. Part No.1SBN010110R1010
BrandABB
€5.11
Each
units
1 NO - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - - CA4 -
RS Stock No. 435-421
Mfr. Part No.2CCS800900R0021
BrandABB
€43.60
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. 512-9493
Mfr. Part No.OA4B10
BrandABB
€18.63
Each
units
1 NO - Snap-On - - SP - - - - - - -
RS Stock No. 460-1506
Mfr. Part No.GHS2701916R0003 - S2-H02
BrandABB
€21.70
Each
units
2 2NC - Side Mount 4 A dc, 6 A ac 24 V dc, 230 V ac DP - - - - - HSMS -
RS Stock No. 614-0845
Mfr. Part No.2CDS200970R0001
BrandABB
€16.02
Each
units
1 NC - - 2 A 230 V ac, 50 V dc SP - - - - - - -