Four poles give you switched neutral or three-phase-plus-neutral protection; the ETU340 electronic trip unit handles the overcurrent release, adjustable for coordination studies. Breaking capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V (–). The 690 V figure (7.5 kA) tells you this is a 480 V class MCCB; it's not designed for primary 690 V distribution.
Mounts in a standard MCCB footprint: 184 mm wide × 248 mm tall × 110 mm deep (–). The 250 A frame accepts lug or busbar connections typical of switchboard and motor control center builds.