The Siemens SENTRON 3VA2063-8JQ42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels. Its 440 kA breaking capacity at 240 VAC and 330 kA at 415 VAC give it the headroom to clear high-fault scenarios without cascading upstream — critical for maintaining selectivity in a multi-level distribution scheme.
At 240 V the unit interrupts 440 kA; at 415 V and 440 V it holds 330 kA; at 500 V it drops to 220 kA; at 690 V it still clears 52.5 kA. That curve means the breaker stays coordinated with downstream 18 kA or 25 kA devices across most industrial voltages — the site electrical engineer can size upstream fuses or transformers without overbuilding the fault rating.
Thermal performance and derating
The 63 A continuous rating holds flat from 40 °C through 70 °C ambient (–) — no derating curve to calculate for a warm panel. Maximum power loss is 3 W, negligible for enclosure heat load calculations. Operating range spans -25 °C to 70 °C; storage from -40 °C to 80 °C.
At 181 mm high, 140 mm wide, and 86 mm deep, the breaker fits standard 200 mm deep enclosures with room for rear cable entry. The 140 mm width is the 4-pole footprint — verify the mounting plate pattern against the existing SENTRON 3VA cutout if replacing an older 3VF or 3VL series breaker.