Eaton ZB65-57 Thermal Overload Relay for DILM Contactors

The Eaton ZB65-57 (ZB65-57) is a bimetallic thermal overload relay designed for dependable motor protection across industrial automation and motor control applications. Engineered for direct mounting beneath compatible Eaton Moeller DILM40, DILM50, DILM65, and DILM72 contactors, or for separate mounting with an appropriate mounting base, this relay protects three-phase electrical motors from thermal overload and phase failure conditions. It provides an adjustable current trip range designed to match motor full-load currents, ensuring precise interruption during sustained overcurrent events to prevent winding burnout. Featuring integrated auxiliary contacts for signaling and trip indication, manual or automatic reset selection, and a test function for operational verification, the device maintains operational reliability and process safety. The Eaton ZB65-57 is widely deployed in motor control centers, pump and fan installations, conveyor systems, compressor drives, and general machinery automation. Built for harsh factory environments, it delivers robust switching performance, short-circuit coordination, and comprehensive protection to minimize unexpected downtime and safeguard connected drive equipment throughout demanding continuous-duty industrial operations.