The ABB TA75DU52 is a 3-pole NEMA-style thermal overload relay with an adjustable current setting range of 36 to 52 A, rated for insulation voltage up to 690 V. It belongs to the A-Line family and is designed for motor protection in three-phase circuits, where the 52 A maximum setting matches the full-load amperage of a NEMA-frame motor at that rating.
The 36-52 A adjustable range means this relay covers motor FLA from 36 A up to 52 A — typical for a 30 HP motor at 460 V or a 25 HP at 230 V. The 3-pole construction protects all three phases of the motor circuit. The NEMA type indicates a form factor and mounting pattern compatible with NEMA-style contactors and starters, so it integrates into existing NEMA motor control centers without adapter plates.
The TA75DU52 carries a current lifecycle stage, meaning it remains in ABB's active product portfolio.