What this MCCB is and what it does
The Siemens 3VA2110-0HL36-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection — meaning it sits upstream protecting feeders and distribution from overcurrents and short circuits, not as a motor starter. It carries a continuous rated current of 100 A across the full ambient range from 40 °C to 70 °C (–), so you don't have to derate for higher panel temperatures. The ETU320 electronic trip unit gives you adjustable overload and short-circuit protection curves, which is handy when coordinating with downstream breakers in a selective system.
Breaking capacity — the real-world number
This breaker's interrupting rating is 440 kA at 415 V AC and 187 kA at 690 V AC. That 440 kA figure at 415 V is what you care about for most industrial low-voltage distribution — it means the breaker can safely clear a fault current up to that level without rupturing, which is important when it's installed near a large transformer or in a high-fault-current panel. The 690 V rating covers 600 V class systems common in North America and some European 690 V drives.
Panel fit and mounting
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep (–). That width is standard for a 3-pole MCCB in the SENTRON 3VA frame — it fits the same mounting footprint as other 3VA breakers, so swapping in a panel that already has busbar cutouts or lug kits should be straightforward. The front face carries an IP40 protection class, meaning it's protected against tools and small wires but not sealed against water — fine for indoor panel mounting.