Siemens 3RU2126-4BC0 – Thermal overload relay

The Siemens 3RU2126-4BC0 is a SIRIUS family thermal overload relay module designed to protect motors from overload when used together with contactors. Its compact design allows easy integration into industrial control circuits and provides reliable current protection. Units of this type commonly feature adjustable current settings and manual/automatic reset options depending on the variant. Compatible with SIRIUS contactors and other Siemens control components — suitable for motor protection and circuit protection functions in automation systems.