What this MCCB is and what the ratings mean for your panel
The Siemens SENTRON 3VA2163-5HN36-0AJ0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel layout in warm enclosures. Its interrupting capacity hits 187 kA at 240 V, dropping to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA figure at 240 V means it can safely clear a fault from a large transformer or a utility feed without the arc flashing upstream — critical for high-fault commercial and industrial service entrances. The 63 A rating is the continuous current the breaker carries without tripping; the interrupting ratings tell you the maximum fault current it can safely break at each voltage level.
Panel fit and mounting
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard 3-pole MCCB footprint that bolts into a panel or mounts on a DIN rail adapter. The 86 mm depth is the dimension you care about for enclosure depth clearance, especially when routing bus bars or cables behind the breaker. It ships with a trip indicator (mechanical flag on the front) and carries an auxiliary switch block rated for 2 auxiliary switches plus 1 trip alarm switch HP — useful for remote status monitoring in a PLC input.
Environmental and compliance
Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The breaker dissipates 4 W maximum at rated load — negligible heat for a panel, but worth noting if you're packing multiple breakers in a sealed enclosure. Insulation voltage is rated 800 V, so it's suitable for 480/277 V and 600 V systems with headroom. The product design is line protection (not motor or generator protection), meaning its trip curve is optimized for cable and bus protection rather than motor inrush.