3RB2036-1UB0 SIMATIC PLC

The Siemens 3RB2036-1UB0 is a SIRIUS 3RB2 series solid-state overload relay designed for current-sensitive protection of three-phase motors. It provides reliable protection against overload, phase failure, and phase imbalance, with an adjustable current setting range of 12.5 to 50 A and Class 10 tripping characteristics. As a solid-state (electronic) relay, it offers superior accuracy and reliability compared to traditional thermal overload relays. The unit is designed for direct mounting onto SIRIUS S2 contactors (such as 3RT1033 through 3RT1036) or can be installed separately using a DIN rail or base-mounted bracket . Its internal power supply eliminates the need for external control voltage, simplifying wiring and commissioning.