ABB TA110DU-110 1SAZ411201R1002 Thermal Overload Relay, 80-110A Class 10A 690V

1. Product Overview

ABB TA110DU-110 1SAZ411201R1002 is a high-precision bimetallic thermal overload relay from ABB’s reliable TA-DU series, professionally designed for three-phase motor overload and phase failure protection. Featuring a precise 80A–110A adjustable current range and standard Class 10A trip characteristic, this industrial-grade protection module delivers stable and reliable motor thermal protection for medium-current AC motors. Rated for690V maximum operational voltage, it supports direct mounting compatibility with ABB A95–A110 and AX95–AX150 contactors, forming a complete motor starter protection assembly. Equipped with dual 1NO+1NC auxiliary contacts and dual automatic/manual reset modes, the TA110DU-110 provides comprehensive overload monitoring, phase loss detection and equipment fault locking functions, widely applied in industrial motor drive systems and mechanical equipment power protection scenarios.

2. Complete Technical Specifications

2.1 Core Electrical & Protection Parameters

The ABB TA110DU-110 1SAZ411201R1002 features a flexible adjustable current setting range of 80A to 110A, covering mainstream medium-power three-phase motor operating currents. It adopts standard Class 10A trip class, ensuring fast and accurate tripping response under overload conditions to avoid motor winding burnout caused by overheating. The maximum rated operational voltage reaches 690V AC, fully adapting to global industrial low-voltage power distribution standards. Built with high-sensitivity bimetallic thermal induction elements, the relay supports real-time three-phase current monitoring and effective phase failure protection, instantly cutting off the control loop when unbalanced current or phase loss faults occur to protect motor equipment.

2.2 Auxiliary Contact & Reset Mechanism

This thermal overload relay integrates standard 1 normally open (1NO) + 1 normally closed (1NC) auxiliary contact configuration, supporting real-time fault signal feedback and interlock control with upper PLC or control circuits. The auxiliary contacts carry stable low-current switching capacity, adapting to industrial signal transmission and fault alarm linkage requirements. The module supports dual reset modes: automatic reset for continuous cyclic production equipment and manual push-button reset for high-risk mechanical equipment, enabling flexible configuration according to on-site process safety standards. After tripping due to overload faults, the relay locks the protection state to prevent accidental equipment restart and ensure maintenance safety.

2.3 Mechanical Structure & Mounting Performance

The ABB TA110DU-110 1SAZ411201R1002 adopts an integrated compact industrial housing with reliable screw-type main circuit wiring terminals, ensuring stable and anti-loose connection in long-term vibration industrial environments. It supports direct contactor mounting, perfectly matching ABB A95-A110 and AX95-AX150 series AC contactors without additional connecting accessories, simplifying cabinet assembly structure and saving installation space. With industrial-grade environmental adaptability, it resists conventional factory dust, temperature fluctuation and electromagnetic interference, maintaining consistent protection accuracy and stable mechanical performance during long-term continuous operation.

3. Core Product Features & Advantages

3.1 Accurate Class 10A Overload & Phase Loss Protection

Adopting high-precision bimetallic thermal induction technology, the ABB TA110DU-110 1SAZ411201R1002 delivers standard Class 10A fast tripping performance. It can quickly respond to motor overload, long-term overcurrent and three-phase current unbalance faults, effectively preventing motor winding aging, overheating damage and equipment burnout. The built-in phase failure detection function solves the common industrial pain point of single-phase operation burnout of three-phase motors, providing all-round safe protection for medium-power motor equipment and improving the overall operational stability of motor drive systems.

3.2 Flexible Current Adjustment & Wide Compatibility

With a wide adjustable current range of 80A–110A, the relay can adapt to multiple motor power specifications within the current interval, reducing equipment model selection restrictions and unifying on-site spare part inventory. Its perfect matching with ABB mainstream contactor series realizes standardized assembly of motor starters, suitable for new project construction and old equipment transformation. The universal 690V high-voltage tolerance adapts to complex industrial power supply environments with voltage fluctuations, meeting the power protection requirements of global industrial automation projects.

3.3 Dual Reset Modes Improve On-Site Adaptability

Supporting both automatic reset and manual button reset functions, the TA110DU-110 flexibly matches different production process logic. Automatic reset is suitable for non-high-risk cyclic operation equipment to reduce manual intervention and improve production efficiency; manual locking reset is applicable to high-risk mechanical equipment, ensuring that faults can only be recovered after manual confirmation to avoid safety accidents. The dual-mode design eliminates the need for customized protection relays for different equipment, greatly improving the versatility and practicality of the protection system.

3.4 Integrated Mounting & High Cost-Performance Deployment

The direct contactor mounting structure simplifies the assembly of motor protection units, reduces intermediate connecting parts, lowers system failure points, and optimizes control cabinet layout. Relying on ABB’s mature industrial electrical manufacturing technology, the relay features stable thermal induction performance, strong anti-interference ability and long service life. As a standardized medium-current motor overload protection device, it balances high-precision protection performance and low engineering cost, becoming the preferred cost-effective solution for medium-power motor safety protection in industrial fields.

4. Industrial Application Scenarios

The ABB TA110DU-110 1SAZ411201R1002 thermal overload relay is widely used in medium-power three-phase motor protection scenarios in industrial automation. It is mainly applied to overload, overcurrent and phase failure protection of production line drive motors, fan and water pump motors, packaging machinery power motors, and logistics conveying equipment motors. In manufacturing workshops, petrochemical equipment, building ventilation systems and industrial power distribution cabinets, it forms a complete motor safety protection system with contactors. It effectively avoids motor equipment damage caused by abnormal current faults, reduces equipment downtime and maintenance costs, and ensures safe and stable operation of industrial electrical systems.

5. Frequently Asked Questions (FAQ)

5.1 What is the adjustable current range of ABB TA110DU-110?

The ABB TA110DU-110 1SAZ411201R1002 features an adjustable current range of 80A to 110A, designed for medium-power three-phase industrial motor overload protection.

5.2 What trip class and voltage rating does this relay support?

It adopts standard Class 10A trip characteristic with fast overload response speed, and supports a maximum operational voltage of 690V AC, adapting to global industrial low-voltage power systems.

5.3 What contact configuration and reset modes are available?

The relay is equipped with 1NO+1NC auxiliary contacts for fault signal feedback and interlock control, and supports automatic reset and manual push-button reset dual working modes for flexible on-site configuration.

5.4 Which contactors is TA110DU-110 compatible with?

It supports direct mounting and perfect matching with ABB A95–A110 and AX95–AX150 series contactors, forming a complete integrated motor starter protection assembly.