ABB 1SDA038306R1 Undervoltage Release

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Product Model

ABB 1SDA038306R1 Undervoltage Release

Product Overview

The ABB 1SDA038306R1 is an undervoltage release device designed for ABB low-voltage circuit breakers, such as the SACE Emax / Tmax series. It automatically trips the circuit breaker when the control or auxiliary supply voltage falls below a specified threshold, enhancing system safety and preventing improper closing due to undervoltage. It is widely used in industrial low-voltage electrical systems as an auxiliary protective component.

Technical Specifications

• Model: 1SDA038306R1

• Type: Undervoltage Release

• Compatible Circuit Breakers: ABB SACE Emax / Tmax series

• Control Voltage: 24 V DC

• Operation: Trips the breaker when the supply voltage falls below the set threshold

• Installation: Mounted on the corresponding auxiliary contact position of the breaker

• Weight: Approx. 0.705 kg

• Standards & Compliance: RoHS compliant

• Environmental Suitability: Designed for industrial low-voltage distribution; resistant to temperature, humidity, and vibration

Advantages & Key Features

1. Enhanced system safety: Automatically trips the breaker under undervoltage conditions to prevent improper operation.

2. OEM design: Fully compatible with ABB low-voltage breakers for reliable performance.

3. Easy installation & replacement: Standardized module, enabling quick changeout and reduced downtime.

4. Industrial reliability: Vibration-resistant, temperature-resistant, and stable for long-term operation.

5. Reduced maintenance costs: Minimizes equipment damage and downtime risks caused by undervoltage.

Application Areas

• Industrial low-voltage power distribution systems: protection of main and control circuits.

• Electrical control cabinets and switchboards: auxiliary protection to prevent undervoltage misoperation.

• Automated production lines and industrial equipment: used with breakers to improve system safety.

• Equipment maintenance and spare-part management: as a standard replacement part for upgrades or repairs.

Precautions

1. Verify compatibility with the circuit breaker model before installation.

2. Confirm the control voltage is 24 V DC and ensure correct wiring.

3. Disconnect control power during installation or maintenance for safety.

4. Test functionality after installation to ensure reliable undervoltage trip operation.

5. Store in a dry, non-corrosive, dust-free environment and avoid high temperatures.

6. Should not replace the main breaker function; only used as auxiliary protection.

The structure and details of the product：

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