Siemens 3RU1146-4KB0 57-75A Class 10 Motor Overload Relay

The Siemens 3RU1146-4KB0 is a Size S3 overload relay designed for protecting larger motors, offering an adjustable current range of 57-75A with Class 10 tripping. It features screw terminals for main and auxiliary circuits and supports both manual and automatic reset. This model is a phased-out product, with the SIRIUS 3RU2 series, specifically 3RU2136-4RB0, identified as its successor.

This overload relay is essential for safeguarding motors in demanding industrial applications such as heavy machinery, large pump systems, industrial fans, and manufacturing lines against thermal overloads and phase unbalance. Its robust design ensures reliable operation under challenging conditions.

Stanlo Automation, a veteran-owned distributor specializing in surplus and obsolete industrial automation parts, provides access to the Siemens 3RU1146-4KB0. By sourcing from Stanlo, you can secure essential components for your systems, often at competitive prices, ensuring operational continuity.