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. 394-9908
Mfr. Part No.LADN22
PHP1,288.48
Each
units
4 2NO/2NC TeSys Front Mount 10 A 600 V ac 4P Screw -5°C +60°C - LADN - -
RS Stock No. 395-0144
Mfr. Part No.GVAE11
PHP628.64
Each
units
2 NO/NC TeSys Front Mount 2.5 A 60 V dc, 240 V ac DP Screw - - - GVAE - -
RS Stock No. 395-0122
Mfr. Part No.GVAN11
PHP885.61
Each
units
2 NO/NC TeSys Side Mount 6 A 240 V dc, 690 V ac DP Screw - - - GVAN - -
RS Stock No. 791-2824
Mfr. Part No.A9A26924
PHP2,345.64
Each
units
1 NO/NC Acti 9 DIN Rail Mount 2 A dc, 6 A ac 24 → 130 V dc, 240 → 415 V ac SPCO Screw -35°C +70°C -35 → +70 °C iOF - -
RS Stock No. 392-8967
Mfr. Part No.3RH1921-1CA10
BrandSiemens
PHP295.37
Each
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1 NO Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS Stock No. 493-0680
Mfr. Part No.276426 & DILA-XHI22
BrandEaton
PHP898.87
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. 608-8781
Mfr. Part No.GV7AE11
PHP2,101.40
Each
units
1 NO/NC - - - 250 V dc, 690 V ac SPDT Screw - - - GV7A - -
RS Stock No. 394-9936
Mfr. Part No.LADN11
PHP765.45
Each
units
2 NO/NC TeSys Front Mount 10 A - DP Screw - - -5 → +60 °C LADN - -
RS Stock No. 513-0229
Mfr. Part No.277950 & DILM150-XHI22
BrandEaton
PHP966.10
Each
units
4 2NO/2NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - DILM - -
RS Stock No. 394-9885
Mfr. Part No.LADN31
PHP1,284.36
Each
units
4 3NO/NC TeSys Front Mount 10 A - 4P Screw -5°C +60°C - LADN - -
RS Stock No. 706-1894
Mfr. Part No.3RV2901-1D
BrandSiemens
PHP656.64
Each
units
1 NO/NC Sirius Innovation Plug In 1 A dc, 10 A ac 250 V dc, 690 V ac SPDT Screw -20°C +60°C -20 → +60 °C 3RV2 - -
RS Stock No. 493-0652
Mfr. Part No.277377 & DILM32-XHI22
BrandEaton
PHP984.59
Each
units
4 2NO/2NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - DILM - -
RS Stock No. 395-0352
Mfr. Part No.GV2AF3
PHP346.24
Each
units
- - - - - - - - - - - GV2A - -
RS Stock No. 521-4585
Mfr. Part No.5ST3011
BrandSiemens
PHP1,996.50
Each
units
2 2NO Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS Stock No. 445-0421
Mfr. Part No.1SAM201902R1001
BrandABB
PHP858.29
Each
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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
PHP1,829.59
Each
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2 NO/NC - Side Mount 1.5 A dc, 6 A ac 110 V dc, 240 V ac DP Screw - - - S2C - -
RS Stock No. 493-9110
PHP850.97
Each
units
2 NO/NC TeSys U Series - 5 A 24 → 250 V ac/dc - - - - - - - -
RS Stock No. 791-2828
Mfr. Part No.A9A26929
PHP2,359.16
Each
units
4 NO/NC + NO/NC Acti 9 DIN Rail Mount 2 A dc, 6 A ac 24 → 130 V dc, 240 → 415 V ac 4P Screw -35°C +70°C -35 → +70 °C iOF - -
RS Stock No. 521-4579
Mfr. Part No.5ST3010
BrandSiemens
PHP1,458.78
Each
units
2 NO/NC Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS Stock No. 395-0627
Mfr. Part No.GVAE1
PHP444.15
Each
units
2 NO/NC - Front Mount - 60 V dc, 240 V ac DP Screw - - - GVAE - -