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庫存編號 706-0876
製造零件編號3RH2911-1FA04
BrandSiemens
HK$113.68
單位
4 4NC 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 - -
全新
RS庫存編號 201-1436
製造零件編號3RH1921-1EA11
BrandSiemens
HK$137.68
單位
2 1NC/1NO SIRIUS Snap-on Mounting 10 A 440 V - - - - - Instantaneous - -
RS庫存編號 124-3139
製造零件編號5ST3045
BrandSiemens
HK$691.96
單位
- - Sentron - - - - - - - - 5ST3 - -
RS庫存編號 706-0888
製造零件編號3RH2911-1FB11
BrandSiemens
HK$131.22
單位
2 NO/NC Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac DPST Screw -25°C +60°C -25 +60 °C 3RH2 - -
RS庫存編號 445-0443
製造零件編號1SAM201902R1002
BrandABB
HK$107.99
單位
2 2NO - Side Mount 2 A dc, 6 A ac 220 V dc, 400 V ac DP - - - - HK1 - -
RS庫存編號 714-1934
製造零件編號SAUXCO
HK$129.50
單位
2 NO/NC - Side Mount - - DP Screw - - - - - -
RS庫存編號 192-0811
製造零件編號66422
BrandABB
HK$305.79
單位
1 CO - DIN Rail Mount - 250 V ac/dc SPDT - - - - - - -
RS庫存編號 714-1773
製造零件編號SAUX2EB
HK$129.50
單位
2 - - Side Mount - - DP Screw - - - - - -
RS庫存編號 178-8042
製造零件編號NHI-B-11-PKZ0
BrandEaton
HK$101.26
單位
2 NO/NC - Front Fastening 1 (AC) A, 2 (DC) A 250 V dc, 440 V ac 2P Screw -25°C +55°C -25 +55 °C NHI - -
RS庫存編號 706-1901
製造零件編號3RV2901-2A
BrandSiemens
HK$85.69
單位
2 NO/NC Sirius Innovation Plug In 2 A dc, 10 A ac 250 V dc, 690 V ac DP Cage Clamp -20°C +60°C -20 +60 °C 3RV2 - -
RS庫存編號 136-3688
製造零件編號3RH2911-2FC22
BrandSiemens
HK$181.38
單位
4 2NO/2NC Sirius Innovation Snap-On 10 A 600 V dc, 690 V ac 4PST Spring Load -25°C +60°C -25 +60 °C 3RH29 - -
RS庫存編號 136-3686
製造零件編號3RH2911-1XA40-0MA0
BrandSiemens
HK$113.68
單位
4 4NO Sirius Innovation Snap-On 10 A 600 V dc, 690 V ac 4PST Screw -25°C +60°C -25 → +60 °C 3RH29 - -
RS庫存編號 513-0213
製造零件編號DILM150-XHI31
BrandEaton
HK$118.63
單位
4 3NO/NC - Front Mount 4 A ac, 10 A dc 220 V dc, 500 V ac 4PST Screw - - - DILM - -
RS庫存編號 776-2944
製造零件編號A9A26500
HK$1,932.90
單位
- - Acti 9 - - - - - - - - iMSU - -
RS庫存編號 122-0940
製造零件編號BFC4-11
BrandWEG
HK$66.44
單位
2 NO/NC - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C BFC4 - -
RS庫存編號 706-0977
製造零件編號3RH2911-2HA12
BrandSiemens
HK$88.66
單位
3 NO/2NC Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac 3PST Cage Clamp -25°C +60°C -25 +60 °C - - -
RS庫存編號 122-0929
製造零件編號BFC0-13
BrandWEG
HK$100.81
單位
4 NO/3NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C BFC0 - -
RS庫存編號 901-0860
製造零件編號11BGX1022
BrandLovato
HK$147.92
單位
4 2NO/2NC - DIN Rail Mount 10 A 690 V 4PST Screw - - - BG - -
RS庫存編號 209-5915
製造零件編號M5725317
BrandMETCASE
HK$1,217.33
單位
- - - - - - - - - - - Mettec 250 x 263 x 150mm 250 mm
RS庫存編號 209-5555
製造零件編號M5723114
BrandMETCASE
HK$912.57
單位
- - - - - - - - - - - - - -