The Siemens 3VA2580-6HN32-0DC0 is a SENTRON molded case circuit breaker rated for 800 A continuous current across the full 40 °C to 60 °C ambient range — no derating needed until you hit 65 °C, where it steps down to 767 A, and 703 A at 70 °C. That thermal stability makes it a solid pick for high-ambient panels near furnaces, drives, or roof-mounted gear. Breaking capacity sits at 242 kA at 240 V, 187 kA at 415 V, and 74 kA at 690 V — numbers that put it in the high-fault tier for industrial mains distribution. The 3-pole line-protection variant carries an ETU350 electronic trip unit with adjustable long-time (tr 0.5–17 s) and short-time (tsd 0.04–0.4 s) delays, plus instantaneous pickup adjustable up to 8000 A. That gives you selectivity headroom downstream without sacrificing fault clearance speed.
The 3VA2580-6HN32-0DC0 measures 320 mm high, 210 mm wide, and 120 mm deep — a standard MCCB footprint for 800 A frames. Maximum power loss is 135 W, which factors into your enclosure thermal calculation if you're stacking multiple breakers.