The Siemens 3VA2163-5KP32-0AJ0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across its full operating temperature range from -25 °C to 70 °C — no derating needed up to that ceiling. Its interrupting capacity hits 187 kA at 240 V, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V is the headline number for high-fault panels: it clears a bolted fault at that level without the arc flashing upstream, which matters when you are coordinating a main breaker downstream of a transformer with a high short-circuit current rating.
Fit and panel integration
This 3-pole MCCB measures 86 mm deep by 105 mm wide by 181 mm tall. The 105 mm width is the standard 4-pole-module footprint for a 3-pole frame — it occupies the same DIN-rail or mounting-plate real estate as other SENTRON 3VA2 breakers, so a panel laid out for a 3VA2163-5HL32-0DB0 will accept this unit without re-drilling. The 86 mm depth leaves clearance behind a 200 mm deep enclosure backplate for wiring and accessory mounting.