The Siemens 3VA2510-5HN32-0AE0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current of 1000 A at 40 °C through 55 °C without derating — it holds full-rated current across the typical panel ambient range, only starting to taper above 60 °C (955 A at 60 °C, 815 A at 70 °C). That means for most installations inside a ventilated enclosure, you don't have to oversize the frame for ambient heat. Three-pole construction with an ETU350 electronic trip unit gives you adjustable long-time pickup (Ir) from 0.5 to 1.0 × In — so you can dial the 1000 A frame down to 500 A if the load doesn't need the full rating — plus short-time delay (tsd) adjustable from 0.04 s to 0.4 s and instantaneous pickup (Ii) up to 10 000 A. That selectivity window lets you coordinate downstream feeders without sacrificing fault clearance speed.
Interrupting capacity across voltage levels
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V, and 53 kA at 690 V — high enough to handle most utility transformer secondary faults without needing a current-limiting fuse upstream. The 121 kA figure at 415 V is what you'd check first for a 400 V distribution panel in a plant main switchboard; it gives you headroom above typical available fault currents in industrial settings.
Dimensions are 210 mm wide × 320 mm high × 120 mm deep — a standard 3-pole MCCB footprint for the 1000 A frame class. The 120 mm depth is what matters for shallow backpanel enclosures; it clears most 200 mm deep cabinets without interfering with the gland plate or door swing. Rated IP40 on the front face, so it's fine for indoor switchgear but needs a secondary cover or higher-rated enclosure if washdown or dust is present.