Siemens B3UA62-00-2H Three Phase Thermal Overload Relay

Siemens B3UA62-00-2H is a three-phase thermal overload relay in the 3UA6 family, engineered to protect motors by interrupting current when overload conditions are detected in a 3‑phase circuit. This device is specified for a current setting range of 55–80 A, enabling precise protection for mid- to high‑load motors commonly found in pumps, fans, conveyors, and compressors. Designed to integrate with standard Siemens motor starter assemblies, it serves as the protective element in a typical Siemens contactor-based motor control scheme, helping prevent overheating and associated equipment damage. The B3UA62-00-2H is used in industrial applications where reliable thermal protection across all three phases is essential, and it complements other Siemens protection products within the same control ecosystem.