What this 100 A MCCB actually does on your line
The Siemens 3VA2010-7HL32-0AA0 is a SENTRON molded case circuit breaker rated for 100 A continuous at 40 °C through 70 °C — no derating needed across that span, which saves you a panel re-spin if ambient runs hot. It carries a 330 kA interrupting rating at 240 V and 242 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. The ETU320 electronic trip unit gives you adjustable long-time, short-time, and instantaneous protection curves, meaning you can coordinate selectively with downstream breakers instead of guessing with fixed thermal-magnetic. Three-pole, line-protection version, no trip indicator, no undervoltage release, no ground-fault monitoring — it's a straight feeder or main breaker for a 100 A bus.
Panel fit — dimensions and mounting
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for the SENTRON 3VA2 series — it bolts into the same mounting holes as other 3VA2 100 A frames. IP40 on the front means it's protected against tools and wires >1 mm, but the enclosure itself needs to handle the rest of the panel environment. No motor drive fitted as standard, but the product extension supports an optional motor drive for remote switching.
Electrical specs that matter for coordination
Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with margin. Power loss at rated current is 7.7 W — negligible for panel heat calcs but worth noting if you're packing multiple breakers in a small enclosure. The ETU320 release is an electronic trip unit, not a thermal-magnetic; that means you get better accuracy and adjustable curves, but it also means the breaker needs control power to trip on a ground fault (which this version doesn't monitor anyway). Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C.