What this MCCB carries and what it protects
The Siemens SENTRON 3VA2225-7HM32-0AA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current (Iu) at 40 °C through 50 °C, with a slight thermal derating above that — 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. The interrupting capacity hits 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V. That 330 kA at 240 V is the headline number for high-fault applications like large transformer secondaries or busway feeds; the 690 V rating matters for 600 V class systems where the available fault current is lower. The ETU330 electronic trip unit gives adjustable I²t and short-time pickup, so this breaker coordinates downstream with smaller MCCBs or fused switches — selectivity curves are available from Siemens. The line protection version means it ships with the standard overcurrent release; no voltage trip or communication module on this variant. Front IP40 keeps dust out of the enclosure face; the body is designed for panel mounting, not washdown environments.
Panel fit and physical integration
Dimensions: 86 mm deep, 105 mm wide, 181 mm tall (3.39 × 4.13 × 7.13 in). That 105 mm width is the standard 3-pole MCCB footprint for the 3VA2 frame size — it occupies three 35 mm DIN-spaced mounting positions if using a backplate adapter, or bolts directly into a panel cutout. The depth of 86 mm leaves clearance for rear-connected busbars or cable lugs. No undervoltage release or communication module on this variant, so no extra wiring for those accessories.