ABB TA42DU-32M Three-Phase Thermal Overload Relay

Description:

The ABB TA42DU-32M Thermal Overload Relay is used in motor starter circuits to provide overload, phase loss, and phase imbalance protection for three-phase motors operating in industrial environments. Commonly installed with ABB contactors in motor control centers, conveyors, pumps, compressors, fans, mixers, and manufacturing equipment requiring reliable motor protection. Maintenance teams and system integrators use this relay for motor starter assemblies, control panel construction, equipment upgrades, and replacement of failed overload protection devices. The TA42DU-32M is an electromechanical overload relay designed for direct mounting to compatible ABB contactors.

Applications:

The ABB TA42DU-32M thermal overload relay is commonly used to protect electric motors from overheating caused by overload conditions, phase failure, and phase imbalance. Typical applications for the TA42DU-32M include conveyors, HVAC equipment, pumps, compressors, agitators, machine tools, and material handling systems utilizing ABB A-Line and AX series contactors. The relay automatically disconnects the motor circuit when current exceeds the adjustable setting range for a predetermined period, helping prevent motor damage and downtime.

Technical Specifications:

• Manufacturer: ABB
• Model / Part Number: TA42DU-32M
• Product ID: 1SAZ311201R2002
• Product Type: Thermal Overload Relay
• Relay Type: Electromechanical Thermal Overload Relay
• Current Adjustment Range: 22 to 32 A
• Rated Operational Current (Ie): 32 A
• Number of Protected Poles: 3
• Tripping Class: Class 10A
• Protection Functions: Overload, Phase Loss, and Phase Imbalance Protection
• Auxiliary Contacts: 1 NC (95-96) + 1 NO (97-98)
• Main Circuit Voltage Rating: Up to 690 VAC
• Auxiliary Circuit Voltage Rating: 500 VAC / 440 VDC
• Reset Type: Selectable Manual or Automatic Reset
• Features: Trip-Free Mechanism, Test Function, STOP Function, Trip Indication
• Temperature Compensation: Yes
• Mounting Type: Direct Mount to ABB Contactors or Separate Mounting Kit
• Compatible Contactors: ABB A30, A40, AX32, AX40, AL30, and AL40 series
• Dimensions: 54 mm W × 90 mm H × 111 mm D
• Approximate Weight: 0.335 kg (0.74 lbs)
• Standards Compliance: IEC 60947-4-1, UL, CSA, CE
• Application Environment: Industrial Motor Protection Systems

Common Replacements:

• ABB TF42-32 Thermal Overload Relay
• ABB TA42DU-25M Thermal Overload Relay
• Siemens 3RU21 Thermal Overload Relay