What it is and what it does
The Siemens SENTRON 3VA2225-6HL32-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, designed for line protection in industrial distribution panels. Its interrupting capacity hits 242 kA at 240 V AC and 187 kA at 415 V AC, so it handles high-fault scenarios like transformer secondaries or large motor starters without needing upstream fuses. The breaker includes an undervoltage release (UVR) and two auxiliary switches (HQ type) for remote status feedback or safety circuit integration.
Sizing and thermal derating
The 250 A rating holds flat from 40 °C up to 50 °C, then derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C — useful when the breaker sits in a warm enclosure near other heat sources. Maximum power loss is 50.5 W, which matters for ventilation planning in a sealed panel.
Physical fit and environment
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard MCCB footprint for 3-pole 250 A frames, so it drops into most existing SENTRON or third-party panel cutouts without re-drilling. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C, covering unheated warehouses or outdoor enclosures.