630 A MCCB with ETU350 — what the ratings mean for your panel
The Siemens 3VA2463-5HN32-0DE0 is a SENTRON 3VA2 molded case circuit breaker rated for continuous current Iu of 630 A at 40 °C, with a 3-pole configuration and the ETU350 electronic trip unit. The ETU350 provides adjustable long-time (tr 0.5–12 s), short-time (tsd 0.02–0.4 s), and instantaneous protection — so you can tune coordination with downstream breakers without swapping trip units. Interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V, and still 9 kA at 690 V, meaning it safely clears high fault currents across common industrial voltage levels. The line protection version is optimized for feeder and main breaker duty, not motor branch circuits.
Dimensions and panel fit
The 3VA2463-5HN32-0DE0 measures 248 mm high, 138 mm wide, and 110 mm deep — a standard 3VA2 frame size that fits most North American and European panel layouts. The IP40 front protection suits enclosed distribution boards; no additional sealing required for indoor use.
Thermal derating and operating limits
Continuous current derates with ambient temperature: 630 A at 40 °C, 612 A at 45 °C, 593 A at 50 °C, 575 A at 55 °C, 557 A at 60 °C, 538 A at 65 °C, and 520 A at 70 °C (–). Operating ambient range is -25 °C to +70 °C; storage range -40 °C to +80 °C. Maximum power loss is 162 W — factor that into enclosure thermal management.