The ABB XT5HU325AFFF000XXX is a 3-pole molded case circuit breaker from the XT5H frame family, rated at 400 A frame size with an EKIP DIP LSI electronic trip unit set to 250 A. The order code breaks down as XT5H (frame series), U (UL/CSA version), 3 (3-pole), 25 (250 A trip rating), AFFF (fixed front terminals, FF designation), 000XXX (variant suffix). This is the UL/CSA-certified variant, meaning it carries the approvals for North American panel builds.
What the EKIP DIP LSI trip unit means for coordination
The EKIP DIP LSI trip unit is an electronic, adjustable type offering L (long-time delay), S (short-time delay), and I (instantaneous) protection functions. For a panel OEM or site electrical engineer, this means you can set the short-time pickup and delay to achieve selective coordination downstream — critical for avoiding nuisance tripping on a feeder serving motor loads or distribution panels. The 250 A rating on a 400 A frame gives you headroom for future load growth without swapping the breaker body.
Panel integration and terminal style
Fixed front terminals (FF) mean the line and load connections are at the front of the breaker, suitable for panel layouts where rear or plug-in connections aren't available. Verify the terminal screw torque and conductor size per the ABB installation manual for the 250 A continuous rating.