Allen-Bradley 592-TPD300 is a NEMA eutectic-alloy, open-type, manual-reset thermal overload relay from the 592 family, designed to protect motors in starter assemblies by tripping on overload and requiring a manual reset to resume operation. It covers a current range of 120–300 A and is used with Allen-Bradley motor starters and related control gear in industrial panels and MCCs. As a Bulletin 592 overload device, it relies on a eutectic alloy element to sense temperature and protect the connected motor from overload conditions.
