The Siemens 3RB1253-0FM20 is a SIRIUS solid-state overload relay designed for advanced motor protection in demanding industrial applications. It offers precise and reliable safeguarding against overload, phase failure, and phase unbalance. With its wide adjustable current range of 20 to 80 A and selectable trip classes (CLASS 10E, 20E, 30E, and 40E), this relay provides flexible protection for motors with both normal and heavy starting conditions. The S6 size unit is designed for stand-alone installation and features robust screw terminals for both main and control circuits, ensuring secure connections and easy integration into your control cabinet.