What this MCCB carries and where it fits
The Siemens SENTRON 3VA2063-5KP32-0HH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current (Iu) at 40 °C through 50 °C, with no derating needed in that band. Above 55 °C the thermal curve drops in steps down to 53.55 A at 70 °C — a detail worth checking if the breaker sits in a hot enclosure or next to other heat sources. The ETU850 electronic trip unit gives adjustable protection curves, and the breaker carries a shunt trip release (STL) for remote opening. Interrupting capacity is what sets this frame apart: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V. That 187 kA at 240 V tells you it's built for high-fault locations — think transformer secondaries or large motor control centers where upstream fault current is substantial.
Panel fit and footprint
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint that installs on a mounting plate or into a SENTRON distribution panel. The 86 mm depth stays within most enclosure clearances, but the height at 181 mm means you'll want to verify the gland plate clearance if you're replacing a shorter frame.
Auxiliaries and communication
Factory-fitted with 2 auxiliary switches plus a separate trip alarm switch (HQ configuration) — enough for remote status and fault indication without adding a module later. The breaker also carries a communication function and an other measurement function, though the evidence doesn't specify protocol. Power loss is 5.4 W maximum, negligible for panel thermal budgeting. Rated insulation voltage is 800 V. Operating range is -25 °C to 70 °C; storage range -40 °C to 80 °C.