The Siemens 3VA2010-7HL46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. Its ETU320 electronic trip unit gives you adjustable overload and short-circuit protection for feeder or distribution duty. Breaking capacity hits 330 kA at 240 V and 242 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. At 690 V the rating drops to 3 kA — that's the limit for 690 V line-side faults, not a typical 400 V distribution point.
Panel fit and mounting
Four-pole frame, 140 mm wide, 181 mm tall, 86 mm deep — it occupies a standard MCCB footprint on the DIN rail or mounting plate. The IP40 front face keeps dust out of the enclosure; the rest of the breaker is rated for inside-panel installation, not washdown. Power loss is 7.7 W at rated load, so the heat load on the enclosure stays modest — no forced cooling needed in a typical 200 mm deep cabinet.
What the ratings mean for your BOM line
The 100 A continuous rating holds from 40 °C to 70 °C — no temperature derating curve to calculate for most panel environments. The ETU320 electronic release gives you adjustable thermal and magnetic pickup, which matters when coordinating with downstream breakers on a motor branch or lighting panel. Insulation voltage is 800 V rated, so the breaker is safe for 690 V line-to-line systems (common in mining or marine distribution) even though the interrupting rating at that voltage is only 3 kA.