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 Dimensions
RS-stocknr. 122-0784
FabrikantnummerTSB
FabrikantWEG
24,16 €
Each
Aantal stuks
4 2NO/2NC - Side Mount 10 A 690 V ac 4PST Screw - - -20 → +70 °C - TSB -
RS-stocknr. 122-0948
FabrikantnummerBFCA-11
FabrikantWEG
7,51 €
Each
Aantal stuks
2 NO/NC - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C - BFCA -
RS-stocknr. 122-0780
FabrikantnummerACBF-11
FabrikantWEG
9,23 €
Each
Aantal stuks
2 NO/NC - Front Mount 2.5 A 250 V ac DPST Screw - - -20 → +70 °C - ACBF -
RS-stocknr. 122-0781
FabrikantnummerACBS-11
FabrikantWEG
9,34 €
Each
Aantal stuks
2 NO/NC - Side Mount 10 A 690 V ac DPST Screw - - -20 +70 °C - ACBS -
RS-stocknr. 122-0949
FabrikantnummerBFCA-13
FabrikantWEG
12,24 €
Each
Aantal stuks
4 NO/3NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFCA -
RS-stocknr. 122-0953
FabrikantnummerBFCA-40
FabrikantWEG
12,15 €
Each
Aantal stuks
4 4NO - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFCA -
RS-stocknr. 122-0931
FabrikantnummerBFC0-22
FabrikantWEG
12,24 €
Each
Aantal stuks
4 2NO/2NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFC0 -
RS-stocknr. 122-0936
FabrikantnummerBFC0-31
FabrikantWEG
12,24 €
Each
Aantal stuks
4 3NO/NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFC0 -
RS-stocknr. 122-0926
FabrikantnummerBFC0-02
FabrikantWEG
7,46 €
Each
Aantal stuks
2 2NC - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C - BFC0 -
RS-stocknr. 122-0942
FabrikantnummerBFC4-20
FabrikantWEG
7,51 €
Each
Aantal stuks
2 2NO - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C - BFC4 -
RS-stocknr. 122-0935
FabrikantnummerBFC025-22
FabrikantWEG
12,15 €
Each
Aantal stuks
4 2NO/2NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFC025 -
RS-stocknr. 122-0941
FabrikantnummerBFC4-13
FabrikantWEG
12,24 €
Each
Aantal stuks
4 NO/3NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFC4 -
RS-stocknr. 122-1058
FabrikantnummerBFB-22 EN
FabrikantWEG
14,29 €
Each
Aantal stuks
4 2NO/2NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFB -
RS-stocknr. 122-1059
FabrikantnummerBFB-13 EN
FabrikantWEG
14,29 €
Each
Aantal stuks
4 NO/3NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFB -
RS-stocknr. 122-0947
FabrikantnummerBFCA-04
FabrikantWEG
12,24 €
Each
Aantal stuks
4 4NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFCA -
RS-stocknr. 122-0951
FabrikantnummerBFCA-22
FabrikantWEG
12,24 €
Each
Aantal stuks
4 2NO/2NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFCA -
RS-stocknr. 122-0939
FabrikantnummerBFC4-04
FabrikantWEG
12,24 €
Each
Aantal stuks
4 4NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C - BFC4 -
RS-stocknr. 122-0932
FabrikantnummerBFC025-02
FabrikantWEG
7,51 €
Each
Aantal stuks
2 2NC - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C - BFC025 -
RS-stocknr. 122-1052
FabrikantnummerBFB-20 EN
FabrikantWEG
8,42 €
Each
Aantal stuks
2 2NO - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C - BFB -
RS-stocknr. 122-0782
FabrikantnummerACBS-20
FabrikantWEG
9,34 €
Each
Aantal stuks
2 2NO - Side Mount 10 A 690 V ac DPST Screw - - -20 → +70 °C - ACBS -