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 711-6357
製造零件編號CA4-31E
BrandABB
HK$178.35
單位
4 3NO/NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw - - - CA4 - -
RS庫存編號 706-0983
製造零件編號3RH2911-2HA21
BrandSiemens
HK$88.66
單位
3 2NO/NC Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac 3PST Cage Clamp -25°C +60°C -25 → +60 °C - - -
RS庫存編號 136-3681
製造零件編號3RH2911-1LA20
BrandSiemens
HK$73.79
單位
2 NO/NC Sirius Innovation Snap-On 10 A 600 V dc, 690 V ac DPST Screw -25°C +60°C -25 → +60 °C 3RH29 - -
RS庫存編號 711-6389
製造零件編號CA4-22N
BrandABB
HK$178.35
單位
4 2NO/2NC - Front Mount 6 A 600 V dc, 690 V ac 4P Screw -40°C +70°C -40 → +70 °C CA4 - -
RS庫存編號 209-5892
製造零件編號M5725314
BrandMETCASE
HK$1,217.33
單位
- - - - - - - - - - - Mettec 250 x 263 x 150mm 250 mm
RS庫存編號 178-8009
製造零件編號DILA-XHIC11
BrandEaton
HK$73.39
單位
2 NO/NC - Surface Mount 4 (AC) A, 10 (DC) A 220 V dc, 500 V ac 2P Spring Clamp -25°C +60°C -25 → +60 °C DILA - -
RS庫存編號 413-1675
製造零件編號GVAE203
HK$105.82
單位
2 2NO - Front Mount - 60 V dc, 240 V ac DP - - - - GVAE - -
RS庫存編號 122-0942
製造零件編號BFC4-20
BrandWEG
HK$60.98
單位
2 2NO - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C BFC4 - -
RS庫存編號 706-0863
製造零件編號3RH2911-1BA01
BrandSiemens
HK$50.79
單位
1 NC 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 - -
RS庫存編號 136-3690
BrandSiemens
HK$113.14
單位
4 NO/3NC 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 246-4529
製造零件編號3RH1921-1FA31
BrandSiemens
HK$109.82
單位
4 3NO/NC Sirius Classic Front Mount 6 A - 4P Screw - - - 3RH1 - -
RS庫存編號 791-2828
製造零件編號A9A26929
HK$388.96
單位
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庫存編號 178-7894
製造零件編號LV426950
HK$237.49
單位
1 NO/NC - Clip On 5 A 110 V dc, 690 V ac - Cage Clamp - - - - - -
RS庫存編號 209-5909
製造零件編號M5735314
BrandMETCASE
HK$1,368.34
單位
- - - - - - - - - - - - - -
RS庫存編號 178-8010
製造零件編號DILA-XHIR11
BrandEaton
HK$165.84
單位
2 NO/NC - Front Fastening 4 (AC) A, 10 (DC) A 220 V dc, 500 V ac 2P Screw -25°C +60°C -25 → +60 °C DILA - -
RS庫存編號 239-5215
製造零件編號7699.0000.9
BrandKopp
HK$125.38
單位
1 NO/NC - Flush - - SP - - - - - - -
全新
RS庫存編號 192-0814
製造零件編號66427
BrandABB
HK$1,222.02
單位
3 CO - DIN Rail Mount - 250 V ac/dc SPDT - - - - - - -
RS庫存編號 244-0107
製造零件編號NHI-E-11-PKZ0
BrandEaton
HK$98.73
單位
2 NO/NC - Front Mount 1 A ac, 2 A dc 24 V dc, 240 V ac DPST Screw - - - - - -
RS庫存編號 136-3682
製造零件編號3RH2911-1NF11
BrandSiemens
HK$257.86
單位
2 NO/NC Sirius Innovation Snap-On 300 mA 60 V dc DPST Screw -25°C +60°C -25 → +60 °C 3RH29 - -
RS庫存編號 706-0866
製造零件編號3RH2911-1BA10
BrandSiemens
HK$52.62
單位
1 NO 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 - -