What this MCCB delivers
The Siemens 3VA2440-5HN32-0AC0 is a SENTRON molded case circuit breaker rated for line protection, built on a 4800 A frame and delivering 400 A continuous at 40 °C — no derating needed up to 70 °C, which simplifies panel thermal budgeting when you're packing breakers close together. Interrupting capacity hits 187 kA at 240 V and still holds 121 kA at 415 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. The 3-pole design includes two built-in auxiliary switches (HQ type) for remote status feedback — no separate aux kit to order and fit.
Panel fit and environment
At 248 mm tall, 138 mm wide, and 110 mm deep, this MCCB fits standard distribution panel cutouts and leaves room for gland plates and cable bending radius on the line side. Rated for operation from -25 °C to 70 °C, with storage down to -40 °C — fine for unheated warehouses or outdoor enclosures in temperate climates. Maximum power loss of 63.5 W means the breaker dissipates heat into the enclosure; factor that into your panel cooling calculation if you're grouping several high-frame units.