Line protection breaker with shunt trip — 250 A frame
The Siemens 3VA2325-5HL32-0KC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in three-phase distribution. It carries a continuous current rating of 250 A across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling, which simplifies panel thermal budgeting. The 3-pole frame breaks fault currents up to 187 kA at 240 V AC, 121 kA at 415 V / 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V, covering most industrial service entrance and feeder applications. This variant ships with a factory-installed shunt trip release (STL) for remote tripping and two HQ auxiliary switches for status feedback to a PLC or annunciator panel. The basic switch core is order code 3VA2325-5HL32-0AA0 — the -0KC0 suffix adds the shunt trip and aux switch package. No undervoltage release, no ground-fault monitoring, and no communication module on this configuration; it is a straightforward line-protection breaker for panels where remote trip and position indication are the only add-ons needed. Power loss at rated current is 37.5 W — a useful figure for enclosure heat-rise calculations when multiple breakers share a compartment. Operating temperature spans -25 °C to +70 °C, storage from -40 °C to +80 °C, so it handles unheated warehouses and outdoor enclosures within reason.
Panel fit and mounting
The breaker measures 248 mm high × 138 mm wide × 110 mm deep (9.76 × 5.43 × 4.33 inches). That 110 mm depth is the critical dimension for shallow backpanel enclosures — verify gland-plate clearance before committing the cutout. The 138 mm width is standard for a 3-pole 250 A MCCB frame; it occupies three adjacent 45 mm module positions on a DIN rail or bolts directly to the mounting plate via the factory footprint.