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 Dimensions External Length
RS Stock No. 209-5864
Mfr. Part No.M5735207
BrandMETCASE
HK$1,008.84
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- - - - - - - - - - - Mettec 350 x 250 x 120mm 350 mm
RS Stock No. 209-5410
Mfr. Part No.M5723004
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HK$574.40
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RS Stock No. 209-6463
Mfr. Part No.M5735104
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HK$943.34
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RS Stock No. 209-5606
Mfr. Part No.M5716107
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HK$566.51
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RS Stock No. 209-5713
Mfr. Part No.M5723204
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HK$768.31
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RS Stock No. 209-5909
Mfr. Part No.M5735314
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HK$1,368.34
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RS Stock No. 209-5527
Mfr. Part No.M5720104
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HK$653.00
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RS Stock No. 209-5785
Mfr. Part No.M5735204
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HK$1,010.27
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RS Stock No. 209-5735
Mfr. Part No.M5723214
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HK$968.17
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RS Stock No. 209-5533
Mfr. Part No.M5723104
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HK$722.09
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RS Stock No. 209-5791
Mfr. Part No.M5735214
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HK$956.61
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RS Stock No. 209-5612
Mfr. Part No.M5720107
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HK$653.00
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RS Stock No. 209-5577
Mfr. Part No.M5725104
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HK$682.17
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RS Stock No. 209-5640
Mfr. Part No.M5723117
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RS Stock No. 209-5741
Mfr. Part No.M5725204
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RS Stock No. 209-5814
Mfr. Part No.M5723217
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HK$756.07
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- - - - - - - - - - - Mettec 230 x 193 x 120mm 230 mm
RS Stock No. 209-5870
Mfr. Part No.M5735217
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HK$1,225.00
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RS Stock No. 209-5498
Mfr. Part No.M5735007
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HK$887.29
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RS Stock No. 209-5690
Mfr. Part No.M5735107
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HK$943.34
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RS Stock No. 209-5836
Mfr. Part No.M5725227
BrandMETCASE
HK$1,316.40
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- - - - - - - - - - - Mettec 250 x 250 x 120mm 250 mm