It carries a rated continuous current of 25 A across ambient temperatures from 40 °C to 50 °C, derating to 24 A at 55 °C and 60 °C, and 23 A at 65 °C and 70 °C — so you can count on full 25 A up to 50 °C before you need to account for thermal derating in a warm enclosure. The interrupting ratings are what make this part stand out: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Overcurrent release and protection design
The "210" designates the specific trip curve family. If you need those add-ons, you'd look at a different variant in the 3VA family.
That 76.2 mm width (3 inches) is a standard 3-pole MCCB footprint for this current class — it will drop into a panel designed for a 3-pole SENTRON 3VA frame without needing to re-drill the mounting plate or adjust busbar spacing. Maximum power loss is 8.5 W — useful to know for thermal calculations inside a sealed enclosure.
For DC network applications, the evidence notes that switching power values in DC networks require consulting the 3VA molded case circuit breaker device manual — the standard AC ratings don't directly apply to DC circuits.