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 Width External Dimensions
RS庫存編號 124-3131
製造零件編號5ST3030
BrandSiemens
TWD1,507.00
單位
- - Sentron - - - - - - - - 5ST3 - -
RS庫存編號 706-0911
製造零件編號3RH2911-1HA20
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TWD382.00
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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 751-5714
製造零件編號3RT1916-2FK21
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TWD4,809.00
單位
2 NO/NC Sirius Classic DIN Rail Mount - - - Screw -25°C +60°C -25 → +60 °C 3RT1 - -
RS庫存編號 706-0905
製造零件編號3RH2911-1HA11
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TWD276.00
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 392-8973
製造零件編號3RH1921-1CA01
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TWD209.00
單位
1 NC Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS庫存編號 392-8967
製造零件編號3RH1921-1CA10
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TWD143.00
單位
1 NO Sirius Classic Snap-On - - SP Screw - - - 3RH1 - -
RS庫存編號 203-3928
製造零件編號3TX4404-0A
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TWD765.00
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4 4NC SENTRON Snap-On 10 A 690 V - - - - - 3TX4 - -
RS庫存編號 201-1436
製造零件編號3RH1921-1EA11
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TWD437.00
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2 1NO/1NC SIRIUS Snap-On 10 A 440 V - - - - - Instantaneous - -
RS庫存編號 203-3930
製造零件編號3TY7561-1KA00
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2 1NO/1NC SENTRON Snap-On 10 A 690 V - - - - - 3TY7 - -
RS庫存編號 136-3691
製造零件編號3RH2911-2HA13
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TWD645.00
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4 1NO/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 203-1987
製造零件編號3KD9103-3
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TWD477.00
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1 1CO SENTRON Plug In 100 mA - - - - - - 3KD - -
RS庫存編號 706-0961
製造零件編號3RH2911-2HA03
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TWD521.00
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3 3NC 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 874-4534
製造零件編號3VA9988-0AA11
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TWD1,503.00
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6 4NO/2NC Sentron Side Mount 10 A - - Screw - - - 3VA - -
RS庫存編號 124-3132
製造零件編號5ST3031
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TWD1,507.00
單位
- - Sentron - - - - - - - - 5ST3 - -
RS庫存編號 243-7454
製造零件編號3RH1911-1AA10
BrandSiemens
TWD392.00
單位
1 NO Sirius Classic Snap-On 6 A - SP Screw - - - 3RH1 - -
RS庫存編號 203-2080
製造零件編號3RH1921-2DA11
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TWD545.00
單位
2 1NO/1NC SIRIUS Snap-On 10 A 17 V dc - - - - - 3RH1921 - -
RS庫存編號 122-9423
製造零件編號3RH2911-1MA20
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TWD421.00
單位
2 2NO Sirius Innovation Snap-On 10 A 690 V DP Screw -25°C +60°C -25 → +60 °C 3RH2 - -
全新
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製造零件編號3RA6912-1A
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TWD1,187.00
單位
2 2NC SIRIUS Front Mounting - - - - - - - - - -
RS庫存編號 136-3685
製造零件編號3RH2911-1XA31-0MA0
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TWD645.00
單位
4 3NO/1NC 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 202-7093
製造零件編號5ST3020-2
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TWD1,435.00
單位
2 1NO/1NC SENTRON DIN Rail Mount - - - - - - - 5ST3 - -