What this MCCB is and what it does
The Siemens SENTRON 3VA2163-6HM46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels. Its interrupting capacity scales with system voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V — meaning it can clear faults up to those levels without upstream devices needing to trip. The breaker carries a ground-fault monitoring version using summation current formation on L + N conductors, which detects leakage without a separate GFCI module. Rated insulation voltage is 800 V.
Thermal performance and derating
The 63 A rating holds flat from 40 °C through 70 °C ambient — no derating needed across that range, which simplifies panel layout in warm enclosures. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 4 W, low enough that ventilation requirements are minimal in a standard enclosure.
Physical fit and panel integration
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a 4-pole MCCB footprint that fits standard Siemens SENTRON mounting bases and busbar systems. No undervoltage release, no communication function, and no trip indicator on this variant — it's a straightforward line-protection breaker without auxiliary electronics.