Siemens SIRIUS 3RU1126-1KB0 Motor Protection Overload Relay

The Siemens 3RU1126-1KB0 is a motor protection overload relay from the SIRIUS 3RU1 series, designed to safeguard electric motors against overcurrent and phase failures. This relay has an adjustable current setting range of 9 to 12.5 Amperes and is rated for Class 10 trip characteristics, indicating it trips within 10 seconds at six times the set current. It is designed for direct contactor mounting on Size S0 contactors.

This relay features manual or automatic reset functionality for the auxiliary circuits and provides a main circuit connection via screw terminals. It is important to note that this is a phased-out product, with the preferred successor being the SIRIUS 3RU2126-1KB0. While this product is no longer manufactured, surplus units remain essential for maintaining existing installations.

Stanlo Automation, a veteran-owned company, specializes in sourcing and supplying surplus industrial automation parts, including hard-to-find components like the Siemens 3RU1126-1KB0 overload relay. We help you keep your legacy systems running by providing reliable access to these older, yet critical, parts, preventing costly downtime and ensuring operational continuity.