ABB 1SDA053704R1 Auxiliary Contact

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1. Product Overview

The ABB 1SDA053704R1 Auxiliary Contact is an accessory module for low-voltage switching devices, used to extend control circuits and provide status feedback for circuit breakers or contactors. The auxiliary contact provides additional open/close signals when the main device changes state, enabling indicator lights, interlock circuits, or remote signaling, ensuring reliable execution of system control logic. It is suitable for ABB SACE Tmax series circuit breaker applications.

2. Technical Specifications

• Model: 1SDA053704R1

• Product Type: Auxiliary Contact

• Contact Configuration: 1 Normally Open + 1 Normally Closed (1 NO + 1 NC)

• Compatible Devices: ABB SACE Tmax T series circuit breakers

• Mounting Method: Mechanically linked to main device

• Rated Voltage: AC/DC 250 V

• Rated Current: 5 A (typical control signal)

• Mechanical Life: ≥ 10,000 operations

• Electrical Life: Suitable for frequent signal switching

• Operating Temperature: –25 ℃ to +60 ℃

• Degree of Protection: IP20

• Standards: IEC 60947-5-1

3. Advantages and Features

1. Accurate Status Feedback
   Converts circuit breaker or contactor state into controllable signals for monitoring and control.

2. Flexible Contact Configuration
   1 NO + 1 NC contacts meet various control logic requirements.

3. Modular Design
   Directly compatible with ABB Tmax series breakers for easy installation and maintenance.

4. High Reliability
   Industrial-grade design ensures long-term stable operation, resistant to vibration and high temperatures.

5. Compact and Expandable
   Small footprint design allows control circuit expansion without extra space.

4. Applications

• Low-voltage breaker status signal feedback

• Electrical control circuit interlocks and status indication

• PLC / DCS input signal expansion

• Distribution panel status monitoring

• Industrial automation equipment switch status feedback

5. Installation and Usage Notes

1. Ensure the auxiliary contact is compatible with the main device before installation.

2. Disconnect power before wiring to prevent electric shock or short circuits.

3. Wire NO and NC contacts correctly to ensure proper control logic.

4. Avoid using in high humidity, dusty, or corrosive environments.

5. Periodically inspect contacts to prevent poor connections and ensure reliable signals.