What this MCCB carries and where it lands
The Siemens SENTRON 3VA2063-5KP32-0CA0 is a 3-pole molded case circuit breaker rated 63 A continuous at 40 °C through 70 °C — no derating needed across that band, which simplifies panel schedules in warm enclosures. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415/440 V, and 75.6 kA at 500 V, so it handles high-fault service-entrance or distribution positions where upstream coordination demands a stiff short-circuit rating. The line-protection design means it's configured for feeder and main breaker duty, not motor-circuit protection — pair it with a separate overload relay for motor starts.
Integration notes: footprint and release
The breaker measures 86 mm deep by 105 mm wide by 181 mm tall — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. It ships with an undervoltage release (UVR) integrated, wired for trip-on-loss-of-voltage applications. The basic switch assembly is order code 3VA20635KP320AA0, so if you're stocking spares, that's the internal mechanism to keep on the shelf. No trip indicator on the front face — rely on the UVR or a remote status contact for fault indication.
Breaking capacity across voltage levels
The interrupting rating drops as line voltage rises: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. At 690 V the breaker is still usable but only for low-fault locations — that 3 kA figure is the limit, so verify the available fault current at the installation point before committing the BOM. The insulation voltage is rated 800 V, which covers 690 V systems with margin.