ABB TA25DU-32 1SAZ211201R1053 Thermal Overload Relay

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Product Overview

The ABB TA25DU-32 is a high-performance thermal overload relay designed to protect motors and industrial electrical equipment from overload damage. It uses a bimetallic thermal trip mechanism to monitor motor current in real time. When the current exceeds the set value, the relay automatically disconnects the circuit, effectively preventing motor burnout. The TA25DU-32 can be combined with ABB contactors to provide a complete motor protection and control solution.

Technical Specifications

• Model: TA25DU-32

• ABB Order No.: 1SAZ211201R1053

• Type: Thermal Overload Relay

• Rated Operational Current (Ie): 0.16–25 A adjustable

• Poles: 3

• Trip Type: Thermal + electromagnetic

• Operating Delay: Thermal trip approx. 5–20 s (depending on overload)

• Mounting: Direct combination with contactor

• Reset Mode: Manual or automatic reset selectable

• Operating Voltage: Corresponding to contactor control voltage

• Protection Rating: IP20

• Standards/Certification: IEC 60947-4-1

Key Features & Advantages

• Precise overload protection — safeguards motors from overload damage

• Adjustable rated current — 0.16–25 A range

• Bimetallic design — reliable thermal trip response

• Contactor compatibility — enables complete motor control and protection

• Flexible reset — manual or automatic reset options

• Industrial certification — IEC-compliant for safe and reliable operation

Application Areas

• Industrial motor protection systems

• Automated production lines

• Pumps, fans, compressors, and other power devices

• Electrical distribution and control systems

• Water treatment and chemical industry

• Machinery manufacturing and processing equipment

Precautions

1. Ensure the relay’s rated current matches the motor before installation

2. Install in an environment free from excessive heat, humidity, or dust

3. Verify correct wiring to avoid short circuits or overload damage

4. Regularly check relay operation and reset functionality

5. Avoid areas with strong electromagnetic interference

6. Disconnect power during maintenance or replacement

The structure and details of the product：

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