What this MCCB is and what it does
The 3VA2063-6HL32-0HC0 is a Siemens SENTRON molded case circuit breaker, designed for line protection in industrial power distribution panels. It's rated for 63 A continuous current across the full ambient temperature range from -25 °C to 70 °C — no derating needed up to that ceiling, which is handy when the panel sits near hot machinery. At 240 V it interrupts 242 kA, at 415 V it's still 187 kA, so it handles serious fault currents without upstream coordination headaches.
Key ratings and what they mean for fit
The 63 A frame is the same across the 3VA2 family, but the interrupting capacity here — 242 kA at 240 V — is the high-end option. That's enough for most secondary distribution panels fed from a large transformer or a generator bus. The 3-pole design handles three-phase loads; the shunt trip (STL) and two auxiliary switches (HQ) let you integrate remote tripping and status feedback into a PLC or safety circuit.
Integration notes
Dimensions: 181 mm high, 105 mm wide, 86 mm deep. That's a standard SENTRON 3VA2 footprint — fits existing DIN-rail or panel-mount cutouts for the series. Spring-cage terminals accept 0.2–2.5 mm² solid or ferruled stranded. The shunt trip coil draws its own power; verify polarity and voltage match the control circuit before energizing.