63 A MCCB with 242 kA interrupting capacity — line protection for high-fault panels
The Siemens SENTRON 3VA2063-6HL32-0KA0 is a 3-pole molded case circuit breaker rated 63 A continuous with a shunt trip release (STL) for remote tripping. Its interrupting capacity reaches 242 kA at 240 V and 187 kA at 415 V, so it handles high available fault current without cascading failure upstream — a key spec for main breaker or large feeder positions in industrial switchboards. Designed for line protection, this MCCB carries a rated insulation voltage of 800 V and maintains its 63 A rating across the full ambient temperature range from -25 °C to 70 °C. That means no derating curve to calculate for warm panels — the 63 A holds at 40 °C, 50 °C, even 70 °C.
Shunt trip and panel fit — what the auxiliary release means for integration
The shunt trip (STL) auxiliary release allows this MCCB to be tripped remotely by a control signal — useful for emergency-stop circuits or supervisory shutdown from a PLC. It occupies the same 105 mm width × 181 mm height × 86 mm depth footprint as the base 3VA2 platform, so it drops into existing panel layouts without re-spacing DIN rails or altering gland plates.