Siemens 3UA59 00-1E Motor Protection Overload Relay

Siemens 3UA59 00-1E is a solid-state, phase‑failure sensitive motor protection overload relay from the 3UA family, designed to guard three‑phase motors against overload and unequal phase conditions. The unit carries the order number 3UA59 00-1E and offers a current setting range of 2.5 to 4 A, enabling precise protection for mid‑sized motors in typical motor control circuits. It is intended for use with Siemens World Series contactors and motor starter models in the 3TF30–3TF46 family, forming a compact protection block when paired with compatible starters. The assembled unit includes wiring connectors and terminals and features a manual reset button for controlled recovery after a trip. As part of Siemens’ phase‑failure sensitive overload protection, it helps detect phase loss and prevents motor damage from incorrect starting, overheating, or sustained unbalance, making it suitable for integration into Siemens motor control centers and standalone protection assemblies.