Siemens 8US1-050-5RK07 Industrial Circuit Breaker

Siemens 8US1-050-5RK07 is a busbar adapter in the SENTRON 8US1 busbar system, designed to fit on a 40 mm center-to-center busbar arrangement and to accept device mounting within compact low-voltage panels. This 8US1-050-5RK07 device adapter has a width of 45 mm, supports a busbar thickness of 5 mm plus an additional 10 mm, and provides outgoing terminals sized for 1.5 to 4 mm2; it mounts on a 35 mm DIN rail and measures 139 mm in length, with an approximate weight of 0.15 kg. The assembly is rated for 25 A and is listed as discontinued by the manufacturer, reflecting its status as a legacy 8US1 busbar accessory. Typical applications include configuring distributed low-voltage blocks in industrial control panels where a 40 mm busbar center-to-center arrangement and a compact device-adapter footprint are required, leveraging Siemens' busbar system to streamline mounting and connection of compatible circuit breakers within the 8US1 ecosystem.