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ABB TA25 DU Thermal Overload Relay  

1. Key Parameters

• Product Model: TA25 DU
• Product Series: ABB TA-Series Thermal Overload Relays (Motor Overload Protection)
• Core Function: Protects 0.1~16A AC motors (single/three-phase) from overload, phase loss, and locked rotor; adjustable current setting; manual/automatic reset; DIN rail mounting; compatible with ABB contactors for integrated motor control.

2. Core Features

• Precise Overload Protection: Class 10 tripping (10s at 6× rated current) balances fast response and false-tripping prevention for motor startup inrush.
• Phase-Loss Detection: Triggers shutdown if a motor phase fails, avoiding single-phase overheating—a common cause of motor burnout.
• Seamless ABB Compatibility: Designed to pair with ABB contactors (e.g., A16-30-10) for integrated motor control, reducing wiring complexity.
• Easy Operation: Adjustable current dial (0.1~16A) and manual/automatic reset options suit diverse application needs (e.g., manual reset for critical motors).

3. Application Fields

• Manufacturing: Protects 0.1~16A conveyor, mixer, and machine tool motors from overload.
• HVAC: Guards HVAC compressor/fan motors (e.g., 4kW three-phase) against phase loss and locked rotor.
• Utilities: Shields small water pump motors in municipal water treatment or solar auxiliary systems.

4. Precautions

• Compatibility: Pair only with ABB contactors (rated current ≤16A) and motors matching the 0.1~16A range—avoid oversize motors.
• Installation: Align current setting with motor rated current; wire NC output to contactor coil for tripping shutdown.
• Maintenance: Check reset status monthly; test tripping function quarterly; replace if contact resistance exceeds 100mΩ.
• Spare Parts: Use genuine ABB TA25 DU units—non-genuine relays may have inaccurate tripping, risking motor damage.

The structure and details of the product：

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