What the ratings mean for fit
The Siemens SENTRON 3VA2063-6KQ42-0AA0 is a 4-pole molded case circuit breaker rated for 63 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed in a warm panel. Its interrupting capacity hits 242 kA at 240 V AC and 187 kA at 415/440 V, dropping to 3 kA at 690 V; that 242 kA figure means it can safely clear a fault on a high-capacity transformer secondary without the arc flashing upstream. The ETU860 electronic trip unit gives adjustable N-conductor protection (OFF, 40 % to 160 % of the phase setting) and supports communication for remote monitoring — a real advantage for a distribution panel that needs to report fault events back to a BMS.
Panel integration
At 140 mm wide, 181 mm tall, and 86 mm deep, this MCCB fits standard Siemens SENTRON panel cutouts and busbar systems. The IP40 front protection means it is suited for enclosed distribution boards — not for washdown or outdoor exposure without an additional enclosure. Mounting is via screw terminals; the 4-pole design handles three-phase plus neutral, with the N-conductor protection adjustable per the ETU860 settings.
Approvals and compliance
Rated insulation voltage Ui of 800 V, storage temperature range -40 °C to 80 °C, operating range -25 °C to 70 °C. The part is designed to IEC 60947-2 and carries the SENTRON brand from Siemens. Compliance documentation (RoHS, REACH, UL, IEC) is provided with the shipment.