What it is and what the ratings mean
The Siemens 3VA2063-5JQ42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 63 A across the full ambient range from 40 °C to 70 °C — no derating needed up to the top of the operating band. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — the 415 V figure is the one that governs most European industrial panels, and it gives real headroom above typical fault levels. Four poles, rated insulation voltage 800 V, and a maximum power loss of 5.4 W. The unit includes a communication function for integration into higher-level monitoring or energy management systems.
Panel fit and deployment
Dimensions are 86 mm deep, 140 mm wide, 181 mm high — mounts into standard panel cutouts for SENTRON 3VA2 frame breakers. The 4-pole footprint matches the common 3-phase-plus-neutral distribution layout in switchboards and motor control centers.