The ABB TA75DU42/DB80 is a thermal overload relay with a Class 10 trip characteristic, adjustable from 29 to 42 A, and includes the DB80 mounting base for direct connection to a contactor.
The 29-42 A adjustment range covers common motor full-load currents for 7.5 to 15 kW (10-20 HP) three-phase induction motors at 400 V. The DB80 base is a dedicated mounting adapter that mates the TA75DU relay to ABB's AF and A-line contactors. Panel integration is straightforward: the relay clips onto the contactor without additional wiring between the two, and the through-hole current sensing path eliminates the need for external CTs up to this rating.