What this MCCB carries — and why it matters
The Siemens 3VA2163-7KP46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across its 4-pole construction. The ETU850 electronic trip unit gives you an adjustable overload protection window from 95 A up to 756 A — so this single frame covers a wide range of motor and feeder applications without swapping hardware. The interrupting ratings are the real story here: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA figure at 240 V means it can safely clear a bolted fault on a high-capacity transformer secondary without the arc flash escalating upstream — a genuine line-side protection device, not a downstream branch breaker. Designed for line protection per the product designation, this MCCB includes a communication function for integration into higher-level monitoring systems. The IP40 front protection means it is suitable for installation inside a panel enclosure where the cover provides the environmental seal — not for exposed outdoor mounting.
Thermal performance and panel integration
The 3VA2163-7KP46-0AA0 holds its full 63 A rating across the ambient temperature range from 40 °C through 70 °C without derating — no need to oversize for a warm enclosure. The unit measures 181 mm tall, 140 mm wide, and 86 mm deep. The 140 mm width is the critical dimension for panel layout: it occupies three standard 45 mm-wide module spaces on the DIN rail. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. Maximum power loss is 4 W — negligible for enclosure thermal calculations, but worth confirming if you are packing multiple breakers in a sealed cabinet. The 800 V rated insulation voltage supports 690 V line-to-line systems with margin. No undervoltage release or ground-fault monitoring version is fitted on this variant; those are separate accessory options in the SENTRON family.