Siemens Sirius 3RU1136-4GD0 is a thermal overload relay designed to mount on a Sirius contactor to protect three-phase motors. It handles a continuous current range of 36–45 A and provides a 1NO-1NC auxiliary contact in a size S2 housing for compact installation. Rated for insulation up to 690 V and offering IP20 protection (pollution degree 3), it is intended for use in standard industrial motor circuits and can protect pumps, fans, conveyors, and other machinery from overload conditions.
