The Siemens SENTRON 3VA2225-6HN32-0KA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, built for line protection duty. It carries an ETU350 electronic trip unit with a shunt trip (STL) auxiliary release — no undervoltage release, no ground fault monitoring, no auxiliary contacts. That 242 kA interrupting rating at 240 V tells you this breaker is sized for high-fault service entrances or large distribution panels where the available fault current is serious. At 415 V it still holds 187 kA, and at 690 V it drops to 6 kA — so the application voltage determines where this lands in your coordination study.
Mounts on a standard DIN rail or panel-mount base. Dimensions: 181 mm high, 105 mm wide, 86 mm deep — that 105 mm width is three pole spaces at 35 mm per pole, so it occupies the same footprint as any 3-pole SENTRON 3VA2 frame. The 48 W maximum power loss at full load means you need some ventilation in the enclosure if you're stacking several breakers side by side. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C — fine for unheated electrical rooms or outdoor enclosures in moderate climates.
No trip indicator, no communication function, no phase failure detection, no ground fault monitoring — this is a straight line-protection breaker with a voltage trigger (shunt trip) for remote opening. The ETU350 release gives you adjustable long-time, short-time, and instantaneous pickup settings, plus ground fault protection if you add the optional module (this unit ships without it). Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems. Latching endurance is 20,000 operations — that's the mechanical life, not the electrical life under load, but it tells you the mechanism is built for a long service interval.