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 751-5714
製造零件編號3RT1916-2FK21
BrandSiemens
HK$758.62
單位
2 NO/NC Sirius Classic DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C 3RT1 - -
RS庫存編號 706-0951
製造零件編號3RH2911-2FB22
BrandSiemens
HK$191.10
單位
4 2NO/2NC Sirius Innovation Snap-On 6 A dc, 10 A ac 250 V dc, 690 V ac 4PST Cage Clamp -25°C +60°C -25 → +60 °C - - -
RS庫存編號 706-0911
製造零件編號3RH2911-1HA20
BrandSiemens
HK$62.06
單位
2 2NO Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac DPST Screw -25°C +60°C -25 → +60 °C 3RH2 - -
RS庫存編號 122-1058
製造零件編號BFB-22 EN
BrandWEG
HK$114.66
單位
4 2NO/2NC - Front Mount 10 A 690 V ac 4PST Screw - - -25 → +55 °C BFB - -
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製造零件編號3RV2901-1D
BrandSiemens
HK$65.10
單位
1 NO/NC Sirius Innovation Plug In 1 A dc, 10 A ac 250 V dc, 690 V ac SPDT Screw -20°C +60°C -20 → +60 °C 3RV2 - -
RS庫存編號 746-0793
製造零件編號3RH2911-1GA40
BrandSiemens
HK$108.72
單位
4 4NO Sirius Innovation Snap Front 10 A 600 V dc, 690 V ac 4P Screw - - -25 → +60 °C 3RH2 - -
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製造零件編號GS1AM110
HK$65.00
單位
1 NO - Top 10 A 600 V ac SP - - - - GS1A - -
RS庫存編號 706-0894
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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 - -
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製造零件編號M5723214
BrandMETCASE
HK$967.07
單位
- - - - - - - - - - - - - -
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2 CO Acti 9 DIN Rail Mount 6 A ac, 6 A dc 130 V dc, 415 V ac DPDT Clamp -37°C +70°C -37 → +70 °C iC60 - -
RS庫存編號 466-295
BrandRS PRO
HK$28.98
單位
1 NO/NC - Panel Mount 63 A - SPDT - - - - - - -
RS庫存編號 178-8042
製造零件編號NHI-B-11-PKZ0
BrandEaton
HK$106.34
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 124-3131
製造零件編號5ST3030
BrandSiemens
HK$291.25
單位
- - Sentron - - - - - - - - 5ST3 - -
RS庫存編號 122-0932
製造零件編號BFC025-02
BrandWEG
HK$60.35
單位
2 2NC - Front Mount 10 A 690 V ac DPST Screw - - -25 → +55 °C BFC025 - -
RS庫存編號 363-5738
製造零件編號LA1KN403
HK$128.00
單位
4 4NO - Clip On 10 A 600 V ac 4P Cage Clamp - - - LA1K - -
RS庫存編號 614-0851
製造零件編號2CDS200970R0002
BrandABB
HK$144.26
單位
1 NO - - 2 A 50 V dc, 230 V ac SP - - - - - - -
RS庫存編號 706-1901
製造零件編號3RV2901-2A
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HK$79.80
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 - -
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HK$101.74
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4 2NO/2NC Sirius Innovation Snap-On 6 A ac, 10 A dc 250 V dc, 690 V ac 4PST Cage Clamp -25°C +60°C -25 → +60 °C 3RH2 - -
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製造零件編號DF14AM2
HK$107.50
單位
2 - - DIN Rail Mount 50 A - DP - - - - DF14 - -
RS庫存編號 772-1228
製造零件編號5SW3300
BrandSiemens
HK$264.54
單位
2 NO/NC Sentron DIN Rail Mount 6 A 230 V ac - - - - - 5SW3 - -