ACI 135911-RHU-80-3-A is a three-pole thermal overload relay designed to protect 3‑phase motors in starter circuits, with a current rating range of 72 to 90 amperes. As part of the RHU-80 family, it provides overload protection by interrupting motor current when the load exceeds the rated range. Documented RHU-80 variants, such as RHU-80/3-90, align with the 72–90 A class, making this relay suitable for protecting motors in industrial panels and motor control centers that operate within that amp range.
