Siemens 3UA52001E 3P Adjustable Overload Relay

Siemens 3UA52001E is a three-pole adjustable thermal overload relay designed to protect three‑phase motors within Siemens starter assemblies. The unit is specified for 600 V operation and offers an adjustable current setting from 2.5 to 4 A, enabling precise motor protection for a range of load profiles. Designed for mounting on a contactor, it uses Siemens' FM-mountable 3UA family format to simplify integration with compatible motor starters (e.g., Siemens 3RT series). The product is cataloged as Market Facing Number 3UA52001E, commonly listed as 3UA5200‑1E by retailers, and is described in official Siemens listings as a thermal-delayed overload relay for three-pole starters. Typical applications include protection of small to mid-size three-phase motors in industrial control panels, conveyors, pumps, and fans where adjustable overload protection is required. This variant’s selection range and mechanical compatibility are tailored for standard Siemens starters, providing reliable protection while affording straightforward reset and replacement within Siemens' motor-control ecosystem.