What this MCCB carries — and where it fits
The Siemens SENTRON 3VA2340-6HN32-0DH0 is a 400 A molded case circuit breaker built for line protection in distribution panels. Three poles, rated continuous current holds at 400 A from 40 °C up through 50 °C, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C — so a panel that runs warm needs to account for the drop above 50 °C ambient. Interrupting capacity scales with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 7.5 kA at 690 V. That 242 kA at 240 V is a high-fault rating — useful downstream of a large transformer or in a plant with stiff utility feed where fault currents run heavy. Physical footprint is 138 mm wide, 248 mm tall, 110 mm deep — fits standard MCCB panel cutouts for this frame size. The unit ships with an undervoltage release (UVR) and a 2-auxiliary-switch plus 1-trip-alarm-switch HQ configuration, so it drops into a control scheme that needs loss-of-voltage tripping and status feedback without adding external relays.
Sourcing and lifecycle — active, quoted to order
If you are cross-referencing an older panel design that used a different SENTRON frame, the 3VA2340-6HN32-0DH0 carries the same 3-pole 400 A rating and UVR provision — but verify the auxiliary switch count and the physical cutout against your existing backpanel layout before committing.
Auxiliary configuration and trip indication
The breaker includes a trip indicator flag and an undervoltage release (UVR) as fitted. Auxiliary switching is 2 form-C auxiliary switches plus 1 trip alarm switch (HQ type) — enough to signal breaker position and fault state to a PLC or annunciator panel without a separate interface module. Power loss at full rated current is 98.5 W maximum. That heat has to leave the enclosure — factor it into your thermal budget if the panel is sealed or tightly packed.