Siemens 3RB2056-1FW2 Overload Relay

Siemens 3RB2056-1FW2 is an electronic overload relay designed for motor protection in the SIRIUS 3RB2 family. It covers 50–200 A motor currents and is sized for the S6 mounting category with a Class 10E trip rating, providing reliable protection for motor circuits in industrial control panels. The relay can be mounted directly on a compatible Siemens contactor or used as a stand‑alone device, offering flexible installation options. Its main circuit path is described as a straight‑through configuration, while the auxiliary circuit is wired via screw terminals for simple field connections. For signaling and control, it provides one normally open and one normally closed auxiliary contact (1NA+1NC), enabling status feedback to interlocks or PLC inputs, and reset can be performed either manually or automatically depending on the configuration. This model is a member of Siemens’ protection equipment lineup and integrates with standard Siemens motor protection schemes used in automation and drive systems.