Siemens SENTRON 3VA2225-8HL32-0AH0 — 250 A MCCB for Line Protection
The Siemens SENTRON 3VA2225-8HL32-0AH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed specifically for line protection in distribution panels and switchgear. It carries a 440 kA interrupting capacity at 240 VAC, dropping to 330 kA at 415/440 VAC, 220 kA at 500 VAC, and 52.5 kA at 690 VAC — so the available fault current at your service voltage is the number that governs whether this breaker clears a bolted fault without cascading upstream.
Thermal Derating and Continuous Current
The 250 A rating holds flat from 40 °C through 50 °C ambient. Above that it derates: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel internal ambient runs hot — say a sealed enclosure near a furnace line — the 70 °C figure is the one to size against, not the nameplate 250 A.
Physical Fit and Auxiliary Configuration
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — a standard 3-pole MCCB envelope that drops into most SENTRON panel-mount bases without re-drilling. Ships with 2 auxiliary switches plus 1 trip alarm switch (HQ type) factory-fitted, so you get remote status and trip indication without ordering a separate accessory kit.
Environmental and Electrical Margins
Operating range is -25 °C to +70 °C; storage from -40 °C to +80 °C. Maximum power dissipation is 48 W at rated load — a factor to include in enclosure thermal calculations if you're packing multiple breakers in a small cabinet. No undervoltage release, no ground-fault monitoring, no communication function on this variant; it's a straight line-protection breaker with mechanical trip indication.