ABB TA25DU18-25 1SAZ211201R1047

ABB TA25 DU Thermal Overload Relay

Description

The ABB TA25 DU is a robust 3-pole thermal overload relay designed for reliable motor protection. This unit is part of ABB’s proven line of control products, offering protection against overload and phase failures. It features a selectable manual or automatic reset, a test function, and temperature compensation. Designed for direct mounting on A-line contactors, it provides a compact and efficient motor starter solution.

Specifications

• Manufacturer: ABB
• Model: TA25 DU
• Part Number: 1SAZ211201R1047
• Setting Range: 18 to 25 A
• Rated Operational Voltage: 690 V AC
• Trip Class: 10A
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
• Mounting Type: Direct Contactor Mount

Label Info

• Standards: EN 60947-4-1, IEC 947-4-1

Application

Ideal for use in industrial control panels for the protection of three-phase motors in applications such as pumps, fans, conveyors, and other machinery.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this refurbished or surplus item, you are contributing to a circular economy and helping to avoid approximately 6.0 kg of CO2 emissions associated with the production of a new unit. This saving is comparable to driving a car for 30 kilometers.

Availability

This is an obsolete item but is available from our stock. Ensure the longevity of your existing systems with this direct replacement part. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the trip class of this relay and what does it mean?

This relay has a Trip Class 10A. This means it is designed to trip within 10 seconds when the motor is drawing 7.2 times its set full-load current (FLC), which is a typical starting condition for standard motors.

Can the TA25 DU be mounted standalone?

The TA25 DU is primarily designed for direct mounting onto compatible ABB A-line contactors (e.g., A26, A30, A40). For standalone mounting, a separate terminal block accessory (like the DB25) is required.

How do I switch between manual and automatic reset on the TA25 DU?

There is a blue selector button on the front face of the relay. You can press and turn it to select either ‘H’ (Hand/Manual reset) or ‘A’ (Automatic reset). Manual reset requires an operator to press the blue reset button after a trip, while automatic reset will attempt to reset itself once the bimetallic strips have cooled down.

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Last Update: Friday, March 13, 2026