ABB XT5VU360BPFF000XXX XT5V 600 A Breaking Part, 3P F F UL/C

The XT5VU360BPFF000XXX: The '600' in the description refers to the frame size — this breaking part fits into the XT5V 600 A frame. The '3P' means three poles, so it switches all three phases. The 'F F' likely indicates front-connection and front-mounted accessories. If you're replacing a breaking part in an existing XT5V switch, this is the interrupting mechanism that slides into the base; you keep the base and handle. Standard for panel builders: mount the base, wire the load-side lugs, then insert the breaking part.