What the ratings mean for fit
The Siemens SENTRON 3VA2440-6HN32-0BC0 is a 3-pole molded case circuit breaker rated for 400 A continuously across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. Its maximum breaking capacity hits 242 kA at 240 V AC, dropping to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. That 242 kA figure at 240 V means it can safely interrupt a fault current up to that level without upstream devices needing to clear first — a key selectivity consideration for high-fault panels. The 4800 A maximum rating (likely the short-time withstand or instantaneous trip setting) is the same as the minimum, so the breaker's magnetic trip is fixed, not adjustable. Designed for line protection, this MCCB carries an undervoltage release (UVR) as the auxiliary release type, plus two HQ auxiliary switches — useful for remote status indication or interlocking in safety circuits. The basic switch variant is 3VA2440-6HN32-0AA0, so this -0BC0 suffix adds the UVR and auxiliary switches. No communication function, no ground-fault monitoring, no voltage trigger — it's a straightforward thermal-magnetic breaker with a UVR for undervoltage tripping.
Panel integration and mounting
Measures 248 mm tall, 138 mm wide, and 110 mm deep. Power loss is 66 W maximum at rated current.