MCCB for line protection — 63 A, 242 kA at 240 V
The Siemens SENTRON 3VA2163-6HN36-0JC0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Its interrupting capacity hits 242 kA at 240 V, 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V, so it handles high-fault-current service entrance or distribution panels where the available fault current is substantial. Designed for line protection, it carries a shunt trip (STL) release and two HQ auxiliary switches built in.
What the ratings mean for fit
The 63 A continuous rating is flat from 40 °C to 70 °C — no thermal derating curve to chase, which simplifies panel sizing in warm enclosures. The 242 kA interrupting rating at 240 V is the headline figure; at 690 V it drops to 3.7 kA, so confirm the available fault current at the installation voltage. The 756 A maximum/minimum entry likely refers to the instantaneous trip setting or a short-time withstand — verify coordination with downstream devices. The 4 W maximum power loss is low enough that ventilation requirements are minimal in a standard enclosure.
Panel integration and wiring
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most distribution panelboards. The shunt trip (STL) allows remote tripping from a safety circuit or emergency stop. The two HQ auxiliary switches provide status feedback for PLC or SCADA monitoring. No undervoltage release is fitted; if UVR is required, this variant does not include it.