MCCB for line protection with high interrupting capacity
The Siemens SENTRON 3VA1063-3ED42-0KH0 is a 4-pole molded case circuit breaker rated for line protection, carrying 63 A continuously at ambient temperatures from 40 °C up to 50 °C before the first derate step kicks in at 55 °C. Its interrupting ratings climb to 75.6 kA at 240 V and 52.5 kA at 415 V, dropping to 32 kA at 440 V and 7.5 kA at both 500 V and 690 V — figures that govern selectivity coordination downstream in a distribution panel.
Rated current holds at 63 A from 40 °C through 50 °C, then steps down by 1 A per 5 °C increment: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. The enclosure measures 130 mm high, 101.6 mm wide, and 70 mm deep — a standard SENTRON 3VA footprint that drops into existing MCCB mounting bases without panel rework.