What the ratings mean for fit
The XT4NE3250BFF000XXX: The 15 A rating on a single pole means this breaker protects one phase of a branch circuit. For a panel OEM or MRO planner, that 15 A figure governs the wire size and downstream load — it's the continuous current the breaker carries without tripping, not a peak or inrush number. The 1-pole form factor keeps the width narrow on the wall-mount panel, so it fits where a 3-pole unit won't.