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. 187-908
Mfr. Part No.LADN11G
MYR51.23
Each
units
2 NO/NC - Front Mount 10 A 690 V ac DP Screw -5°C +60°C -5 → +60 °C LADN - -
RS Stock No. 791-2837
Mfr. Part No.A9A26927
MYR185.86
Each
units
1 NO/NC Acti 9 DIN Rail Mount 2 A dc, 6 A ac 24 → 130 V dc, 240 → 415 V ac DP Screw -35°C +70°C -35 → +70 °C iSD - -
RS Stock No. 395-0172
Mfr. Part No.GVAD0110
MYR144.50
Each
units
2 NO/NC - Side Mount - 240 V dc, 690 V ac DP Screw - - - GVAD - -
RS Stock No. 412-2621
Mfr. Part No.208281 & DILM820-XHI11-SI
BrandEaton
MYR96.96
Each
units
2 1NO/1NC - Side Mount 4 A ac, 10 A dc 220 V dc, 500 V ac DPST Screw -40°C +60°C -40 → +60 °C DILM - -
RS Stock No. 608-7902
Mfr. Part No.GS1AP34
MYR169.45
Each
units
- - - - - - - - - - - GS1A - -
RS Stock No. 392-8967
Mfr. Part No.3RH1921-1CA10
BrandSiemens
MYR25.07
Each
units
1 NO Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS Stock No. 513-0213
Mfr. Part No.277949 & DILM150-XHI31
BrandEaton
MYR65.40
Each
units
4 3NO/NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - DILM - -
RS Stock No. 492-1692
Mfr. Part No.082884 & NHI-E-10-PKZ0
BrandEaton
MYR50.54
Each
units
1 NO - Front Mount 1 A ac, 2 A dc 110 V dc, 240 V ac SPST Screw - - - - - -
RS Stock No. 866-1495
Mfr. Part No.290615 & XTCEXSBN11
BrandEaton
MYR174.96
Each
units
2 1NO/1NC - Side Mount 10 A - DPDT Screw - +50°C - - - -
RS Stock No. 746-0796
Mfr. Part No.3RH2911-1GA22
BrandSiemens
MYR101.91
Each
units
4 2NO/2NC Sirius Innovation Snap Front 10 A 600 V dc, 690 V ac 4P Screw - - -25 → +60 °C 3RH2 - -
RS Stock No. 493-0680
Mfr. Part No.276426 & DILA-XHI22
BrandEaton
MYR56.73
Each
units
4 2NO/2NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - DILA - -
RS Stock No. 759-011
Mfr. Part No.LA1KN20
MYR40.39
Each
units
2 2NO - Clip On 10 A 600 V ac DP Screw - - - LA1K - -
RS Stock No. 400-1401
Mfr. Part No.GVAM11
MYR132.04
Each
units
1 NO/NC - Side Mount - - SPDT Screw - - - GVAM - -
RS Stock No. 445-8093
Mfr. Part No.GHE3401321R0001
BrandABB
MYR130.93
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. 711-6317
Mfr. Part No.1SBN010110R1010
BrandABB
MYR23.70
Each
units
1 NO - Front Mount 6 A 600 V dc, 690 V ac SP Screw - - - CA4 - -
RS Stock No. 608-8775
Mfr. Part No.GV7AC01
MYR117.16
Each
units
- - - - - - - - - - - GV7A - -
RS Stock No. 901-0863
Mfr. Part No.11BGX1031
BrandLovato
MYR75.90
Each
units
4 3NO/1NC - DIN Rail Mount 10 A 690 V 4PST Screw - - - BG - -
RS Stock No. 776-3957
Mfr. Part No.A9A26897
MYR225.23
Each
units
2 NO/NC Acti 9 DIN Rail Mount 6 A 24 V dc - Cage Clamp -35°C +70°C -35 → +70 °C iOF - -
RS Stock No. 758-478
Mfr. Part No.K1 H010/A11-VE
MYR58.34
Each
units
2 NO/NC - - 40 A, 63 A - DP - - - - - - -
RS Stock No. 467-9666
Mfr. Part No.048912 & 31DILE
BrandEaton
MYR93.04
Each
units
4 3NO/NC - Front Mount 2.5 A dc, 4 A ac 220 V dc, 500 V ac 4PST Screw - - - - - -