Siemens 3UA5200-0A Overload Relay

Siemens 3UA5200-0A Overload Relay is a thermal delayed protection device that guards AC motors within Siemens starter configurations from overload and phase faults. It is part of the 3UA5200 family of overload relays, designed to mount with Siemens contactors and provide a signaling path via a 1NO+1NC auxiliary contact. Variants in the family cover a range of current settings: for example 3UA5200-1F specifies a 3.2–5 A range with 1NO+1NC, 3UA5200-1J covers 6.3–10 A, and 3UA5200-1K targets 0.16–0.25 A; other configurations exist, including some market variants described without UL/CSA/CE certifications. The 3UA5200-0A model carries the same protection purpose within the family, with the exact setting range determined by the terminal variant, and is intended to trip on overload to prevent motor winding damage. This relay is typically used in conjunction with Siemens starter assemblies to provide motor protection, testing, and signaling in industrial control panels. Typical mounting onto the starter assembly enables compact integration in control panels.