The Siemens SENTRON 3VA2225-7HN32-0AJ0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, sized for line-protection duty in distribution panels. It carries a 330 kA breaking capacity at 240 V, dropping to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V — so the short-circuit rating is high enough to handle most service-entrance and sub-feed applications without cascading upstream. The 250 A rating holds flat from 40 °C through 50 °C, then derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C — useful if the breaker sits in a warm enclosure or near other heat sources. Maximum power loss is 48 W.
Fit and mounting
Dimensions are 86 mm deep, 105 mm wide, 181 mm tall — the 105 mm width is the standard Siemens 3VA frame footprint for a 3-pole MCCB, so it drops into the same panel cutout and bus-bar spacing as other 3VA frame breakers. The supplied basic switch variant is 3VA2225-7HN32-0AA0; this order code adds the auxiliary switch configuration: 2 auxiliary switches plus 1 trip alarm switch (HP type).