Siemens 3UA52 00-1F Overload Relay

Siemens 3UA5200-1F is a thermal-delayed overload relay that mounts on Siemens contactors and starters to protect three‑phase motors from overload. It provides an adjustable setting range of 3.2 to 5 A (Ie) and includes a built‑in auxiliary contact configuration of 1 normally open and 1 normally closed (1NO+1NC) for signaling or interlock applications. This relay is designed for direct mounting onto Siemens starter assemblies such as 3TB, 3TF, or 3TR, integrating the overload protection with the control circuit in a compact package. As part of the 3UA overload relay family, it delivers thermal protection based on motor current and is intended for use with compatible Siemens starters in standard industrial motor-control schemes. Note that Siemens lists this particular variant as 3UA5200-1F and some catalog pages indicate it is no longer available; if sourcing today, verify compatibility with your existing Siemens contactor or consider current equivalents or refurbished units from authorized distributors to maintain motor protection in ongoing equipment upgrades.