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. The 800 V rated insulation voltage supports 690 VAC line-to-line systems common in industrial motor control centers.
Breaking capacity and selectivity
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.
Dimensions and panel fit
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.