What this MCCB is and what it does
The Siemens SENTRON 3VA2325-5HN32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed for line protection in distribution panels and industrial switchboards. Its interrupting capacity is specified per voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V — figures that govern the available fault current the breaker can safely clear at the point of installation. The continuous current rating holds at 250 A across the full ambient temperature range from 40 °C to 70 °C, meaning no derating is required for elevated panel temperatures within that band.
Physical fit and panel integration
Dimensions are 248 mm height, 138 mm width, and 110 mm depth — the depth figure is the critical dimension for enclosure depth clearance when mounting on a DIN rail or panel backplate. The breaker ships with a factory-fitted basic switch (order code 3VA2325-5HN32-0AA0) and includes 2 auxiliary switches plus 1 trip alarm switch (HQ configuration) for status feedback to a PLC or annunciator.
Key ratings and what they mean for selection
Maximum power loss is 37.5 W — a figure to account for in panel thermal calculations, particularly in sealed enclosures where heat dissipation is limited. Operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C; the storage minimum is the more restrictive limit for warehousing or cold-site staging. No undervoltage release, no ground-fault monitoring, and no communication function are fitted on this variant — it is a straight line-protection breaker without auxiliary releases or remote monitoring.