What it is and what it does
The Siemens SENTRON 3VA2063-5KP32-0HC0 is a 3-pole molded case circuit breaker rated for 63 A continuous current, designed for line protection in industrial distribution panels. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415 V — figures that place it in the high-fault tier for commercial and light industrial mains protection. The breaker carries a shunt trip release (STL) and two HQ auxiliary switches, plus an onboard communication function for integration into a monitored distribution system.
What the ratings mean for your panel
The 63 A rating holds flat across the entire operating temperature range from 40 °C to 70 °C — no derating needed in a warm enclosure, which simplifies thermal budgeting in a packed cabinet. At 86 mm deep, 105 mm wide, and 181 mm tall, this 3-pole MCCB fits standard Siemens SENTRON mounting footprints; the 5.4 W maximum power loss keeps heat rise manageable in a multi-breaker lineup. The voltage-trigger function and absence of an undervoltage release mean the trip unit responds to overcurrent and short-circuit conditions only — no nuisance tripping from brownouts.