What the TMA trip unit means for your panel
The XT5HQ350BBFF000XXX: The TMA trip gives you a thermal-magnetic curve with an adjustable magnetic pickup range of 500–5000 A. That's a 10:1 adjustment window, which is wide enough to coordinate with downstream branch breakers or motor starters without swapping trip units. On a 600 A frame, this breaker is sized for main or feeder duty in switchboards, panelboards, and industrial control panels. The 100% rating means it can carry its full 600 A continuously without derating — important for high-load-density enclosures where every amp of headroom counts.
