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 Number of Timing Ranges External Dimensions
RS庫存編號 394-9920
製造零件編號LADN13
HK$115.36
單位
4 NO/3NC - Front Mount - - 4P Screw - - - LADN - -
RS庫存編號 521-4579
製造零件編號5ST3010
BrandSiemens
HK$211.92
單位
2 NO/NC Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS庫存編號 279-6337
製造零件編號LA1KN31
HK$86.85
單位
4 3NO/NC - Clip On 10 A 600 V ac 4P Screw - - - LA1K - -
RS庫存編號 246-4507
製造零件編號3RH1921-1FA22
BrandSiemens
HK$65.45
單位
4 2NO/2NC - Front Mount 6 A - 4P Screw - - - 3RH1 - -
RS庫存編號 246-5077
製造零件編號3RV1901-1B
BrandSiemens
HK$89.78
單位
2 2NO Sirius Classic Side Mount 2 A 24 V ac DP - - +60°C Maximum of +60 °C 3RV1 - -
RS庫存編號 394-9885
製造零件編號LADN31
HK$162.48
單位
4 3NO/NC TeSys Front Mount 10 A - 4P Screw -5°C +60°C - LADN - -
RS庫存編號 493-9110
HK$92.34
單位
2 NO/NC TeSys U Series - 5 A 24 → 250 V ac/dc - - - - - - - -
RS庫存編號 791-2852
製造零件編號A9C15419
HK$540.00
單位
- - Acti 9 DIN Rail Mount - 12 → 48 V ac - Screw -5°C +50°C -5 → +50 °C iATET - -
RS庫存編號 272-870
製造零件編號GVAED011
HK$146.25
單位
2 NO/NC - Front Mount - - DP - - - - GVAE - -
RS庫存編號 711-6335
製造零件編號CC4-01
BrandABB
HK$112.51
單位
1 NC - Front Mount 6 A 600 V dc, 690 V ac SP Screw -40°C +70°C -40 → +70 °C CC4 - -
RS庫存編號 326-633
製造零件編號22DILEM
BrandEaton
HK$141.29
單位
4 2NO/2NC - Front Mount 2.5 A dc, 4 A ac 220 V dc, 500 V ac 4PST Screw - - - - - -
RS庫存編號 394-9914
製造零件編號LADN20
HK$65.71
單位
2 2NO TeSys Front Mount 10 A - DP Screw - - - LADN - -
RS庫存編號 735-2715
製造零件編號3SB1400-0A
BrandSiemens
HK$102.49
單位
2 NO/NC - Front Mount 10 A 220 V dc, 400 V ac DPST Screw -25°C +70°C -25 → +70 °C - - -
RS庫存編號 257-3689
製造零件編號VZ01
HK$78.20
單位
1 - - Side Mount 16 A 690 V ac SP Screw -20°C +50°C -20 → +50 °C VZ01 - -
RS庫存編號 521-4591
製造零件編號5ST3012
BrandSiemens
HK$205.43
單位
2 2NC Sentron DIN Rail Mount 6 A 230 V ac DP Screw -5°C +40°C -5 → +40 °C 5ST3 - -
RS庫存編號 400-1467
製造零件編號LAD8N11
HK$79.50
單位
- - - - - - - - - - - LAD8 - -
RS庫存編號 257-3702
製造零件編號VZ1
HK$94.55
單位
1 - - Side Mount 25 A 690 V ac SP Screw -20°C +50°C -20 → +50 °C VZ1 - -
RS庫存編號 326-712
製造零件編號11DILE
BrandEaton
HK$76.30
單位
2 NO/NC - Front Mount 2.5 A dc, 4 A ac 220 V dc, 500 V ac DPST Screw - - - - - -
RS庫存編號 392-8967
製造零件編號3RH1921-1CA10
BrandSiemens
HK$58.23
單位
1 NO Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS庫存編號 209-6463
製造零件編號M5735104
BrandMETCASE
HK$800.83
單位
- - - - - - - - - - - Mettec - 350 x 250 x 85mm