Siemens 3UA54002C is a thermal-delayed overload relay rated for 16 to 25 A, designed to mount on a compatible contactor to provide motor overload protection. This 3UA5 family device senses motor current and trips the circuit when the load exceeds the preset range, safeguarding motors from damage due to excessive current. The exact model number 3UA54002C represents the 2C variant within the 3UA54x series, offering a 16–25 A setting range compatible with common Siemens Sirius contactors. Typical applications include protection of three-phase motors in conveyors, fans, pumps, and other equipment where motor overload could cause damage or unscheduled downtime.
