SENTRON 3VA2 MCCB — 63 A, ETU350, 242 kA IC
The Siemens 3VA2063-6HN32-0AF0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a 242 kA interrupting capacity at 240 V AC — enough headroom for high-fault utility feeds or transformer secondaries without cascading upstream breakers. It carries the ETU350 electronic trip unit, which gives you adjustable long-time, short-time, and instantaneous protection curves — useful for coordinating with downstream feeders on a motor control center or distribution panel. Rated insulation voltage is 800 V, so it handles 480/600 V class systems comfortably; the 187 kA at 415 V and 121 kA at 500 V tell you it holds its breaking performance across common industrial voltages.
Dimensions & Panel Fit
The 3VA2063-6HN32-0AF0 measures 86 mm deep, 105 mm wide, and 181 mm tall — a standard 3-pole MCCB footprint that fits most DIN-rail or screw-mounted panel layouts without re-drilling. Front face carries IP40 protection — suitable for enclosed distribution boards where tools or fingers won't contact live parts through the front cover.
Auxiliary & Signaling
Comes with one auxiliary switch and one trip alarm switch (HQ designation) — gives you a remote status contact for the breaker position and a separate contact that closes only on a fault trip, handy for PLC alarm inputs or annunciator panels. Trip indicator is present — a visible flag on the breaker face confirms a trip event even if the handle resets.
Thermal Derating & Environment
Rated 63 A from 40 °C up to 50 °C without derating; above that it drops linearly to 53.55 A at 70 °C — plan your enclosure ventilation if the breaker sits near heat sources or in a sealed cabinet. Operating range is -25 °C to 70 °C; storage range from -40 °C to 80 °C covers cold warehouses and hot shipping containers. Maximum power loss is 5.4 W — negligible for thermal budgeting in a multi-breaker panel.