What this MCCB does — and what the ratings actually mean
The Siemens 3VA2010-8JQ46-0AA0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection in 4-pole distribution. Its 100 A continuous rating holds flat from 40 °C up to 70 °C — no derating curve to chase in a warm panel (–). The ETU560 electronic trip unit gives you adjustable long-time, short-time, and instantaneous pickup, plus ground-fault monitoring via summation current on L+N. That ground-fault function is built in, not a bolt-on accessory. The interrupting ratings are the headline: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V (–). Those numbers mean this breaker can sit upstream of a large transformer or a high-fault bus without needing a current-limiting fuse ahead of it. For a 480 V panel in North America, the 330 kA at 440 V figure is the one that governs coordination studies — it clears faults well above what most distribution transformers can deliver. Communication is on board, so it can talk to a BMS or PLC via the SENTRON bus — no separate comm module needed. The motor drive option means remote open/close is available if you spec the accessory. Insulation voltage is rated 800 V, and the front face carries IP40 — fine for a clean indoor panel, not for washdown.
Panel fit — dimensions and mounting
The breaker measures 140 mm wide by 181 mm tall by 86 mm deep (–). That 140 mm width is the standard 4-pole MCCB footprint for the 3VA frame — it lands on a DIN rail or bolts directly to a mounting plate. The 86 mm depth means it clears most 200 mm deep enclosures with room for rear busbars. If you're swapping out an older 3VA or 3WL frame, check the busbar spacing; the terminal centers are the same family pattern.