What this MCCB delivers — and what it doesn't
The Siemens SENTRON 3VA2225-5HL32-0JH0 is a 3-pole molded case circuit breaker rated for 250 A continuous current (Iu) at 40 °C, with the same rating holding flat through 50 °C — useful when the panel ambient runs warm but not hot. Above 55 °C it derates linearly to 213 A at 70 °C, so if your enclosure sits near a furnace line or in a non-conditioned space, check the thermal curve against your load. Interrupting capacity is the headline here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V. That 187 kA figure at 240 V means it handles high-fault scenarios on the secondary side of a step-down transformer or a large UPS bypass — not every MCCB in this frame size carries that. At 690 V the 5.1 kA rating is modest; if your system runs 690 V with fault currents above that, this breaker is not the right choice for that voltage leg. The overcurrent release is an ETU320 — a basic electronic trip unit with fixed settings (no adjustable long-time, short-time, or ground-fault pickups). It is a line-protection breaker, not a motor-protection or feeder-selectivity device. There is no communication function, no phase-failure detection, and no undervoltage release fitted. The auxiliary contact package is 2 auxiliary switches plus 1 trip alarm switch (HQ version), and a shunt trip (STL) is built in for remote tripping. The supplied basic switch is order code 3VA2225-5HL32-0AA0; the integrated auxiliary trip is 3VA9688-0BL32.
Mounting and integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA frame that bolts into a panel or mounts on a mounting plate. No DIN-rail clip on this frame; it is screw-fixed. The 86 mm depth leaves clearance for rear-connected busbars or cable ladders behind the panel door.