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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Omschrijving Prijs 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 Width
RS-stocknr. 488-7384
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4 3NO/1NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
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1 1NC Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac SPST Screw -25°C +60°C -25 → +60 °C - 3RH2 -
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2 1NO/1NC TeSys U Series - 5 A 24 → 250 V ac/dc - - - - - - - -
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FabrikantEaton
€ 14,19
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4 1NO/3NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - - DILM -
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€ 17,20
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4 3NO/1NC TeSys Front Mount 10 A - 4P Screw -5°C +60°C - - LADN -
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€ 11,19
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€ 14,49
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4 4NO Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac 4PST Screw -25°C +60°C -25 → +60 °C - 3RH2 -
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2 2NO Sirius Innovation Plug In 1 A dc, 2.5 A ac 60 V dc, 230 V ac DP Screw -20°C +60°C -20 → +60 °C - - -
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Fabrikantnummer276421 & DILA-XHI11
FabrikantEaton
€ 7,58
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2 1NO/1NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac DPST Screw - - - - DILA -
RS-stocknr. 502-187
Fabrikantnummer100-KFC20
FabrikantAllen Bradley
€ 9,38
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2 2NO - Snap-On 12 A - DPST Screw - - - - 100K -
RS-stocknr. 187-908
FabrikantnummerLADN11G
€ 10,75
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2 1NO/1NC - Front Mount 10 A 690 V ac DP Screw -5°C +60°C -5 → +60 °C - LADN -
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6 5NO/1NC - Side Mount - - 6P Screw - - - - LA1L -
RS-stocknr. 746-0718
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2 1NO/1NC Sirius Classic Lateral - - DP Screw - - - - 3RH1 -
RS-stocknr. 711-6345
Fabrikantnummer1SBN010140R1040 CA4-40E
FabrikantABB
€ 19,23
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4 4NO - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - - CA4 -
RS-stocknr. 746-0783
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4 4NC Sirius Innovation Snap-On 10 A 600 V dc, 690 V ac 4P Screw - - -25 → +60 °C - 3RH2 -
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FabrikantnummerGVAM11
€ 16,43
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1 1CO - Side Mount - - SPDT Screw - - - - GVAM -
RS-stocknr. 238-1058
Fabrikantnummer100-FA02
FabrikantAllen Bradley
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