Siemens 3RB3046-1XB0 Overload Relay

Siemens 3RB3046-1XB0 is a solid-state overload relay for motor protection that mounts directly to compatible Siemens contactors in three‑phase systems. It covers a current range of 32 to 115 A, is sized as S3, and carries Class 10E tripping for reliable overload detection. The relay is designed for contactor mounting and features screw terminals for both the main circuit and the auxiliary circuit, enabling straightforward wiring. It offers either manual or automatic reset, allowing you to choose whether a trip requires a manual reset or resets automatically after the fault clears. This model is part of the Siemens Sirius 3RB family and is commonly paired with Siemens 3RT contactors (such as 3RT2045/2046/2047) to form a compact motor-protection solution. Typical applications include protection of motors in pumps, fans, conveyors, and compressors where precise current sensing and selectable reset behavior help minimize downtime and equipment damage.