The ABB XT5LU330AEFF000XXX is a molded case circuit breaker (MCCB) from the XT5L series, identified on the nameplate as ABB 1SDX036406R1 XT5L 400 BRE. This is the part you need if your BOM calls out that exact order code — it is the physical breaker, not an accessory or a subassembly.
The description field lists ABB 1SDX036406R1 XT5L 400 BRE.
This MCCB is designed for installation in a switchboard or distribution panel, typically bolted onto a mounting plate or busbar system. The XT5L series is a compact, high-performance line used for feeder and main breaker protection in commercial and industrial power distribution.