The Siemens SENTRON 3VA2063-5HN32-0AG0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in industrial distribution panels. It delivers a 187 kA interrupting capacity at 240 V AC, dropping to 121 kA at 415/440 V and 75.6 kA at 500 V — high enough for most main or feeder breaker applications where fault current runs hot. That 187 kA at 240 V means it can safely clear a massive bolted fault without the arc flashing over to the buswork — critical for switchboards with high transformer kVA behind them. At 690 V the rating drops to 3 kA, so watch the voltage class on the nameplate before committing it to a 600 V system. The breaker carries a full thermal-magnetic trip curve rated flat at 63 A from 40 °C all the way up to 70 °C ambient — no derating needed in a warm panel. That's unusual; most breakers start tapering above 40 °C. It means the 63 A marking is the real-world ampacity, not a catalog number you have to knock down. Mounting dimensions are 105 mm wide by 181 mm tall by 86 mm deep — standard SENTRON 3VA2 footprint. It bolts into a panel base or mounts on a mounting plate; no DIN-rail clip on this frame size. The 86 mm depth leaves room for rear-connected busbars without crowding the enclosure depth.
The 3VA2063-5HN32-0AG0 ships with a factory-installed auxiliary switch and trip alarm switch (1 each, HP type). The base switch assembly is order code 3VA20635HN320AA0 — useful to know if you're stocking spare internal mechanisms rather than whole breakers.