What this MCCB does — and what the ratings mean for your panel
The Siemens SENTRON 3VA2010-6HL36-0AA0 is a 3-pole 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. That 100 A holds flat from 40 °C through 70 °C, which is unusual and simplifies panel thermal budgeting. Its interrupting ratings tell the real story: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. That 242 kA at 240 V means this breaker can safely clear a fault on a high-capacity transformer secondary without the arc flash energy cascading upstream — a key spec for selectivity studies on large low-voltage switchboards. The ETU320 electronic trip unit provides adjustable overload and short-circuit protection curves, making this a line-protection breaker suited for feeder circuits in distribution panels, motor control centers, and industrial switchgear. IP40 on the front means it's protected against tools and wires >1 mm — standard for enclosed panel mounting, not for washdown environments.
Physical fit and panel integration
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — a standard SENTRON 3VA frame size that mounts on a DIN rail or directly to a backplate. The 86 mm depth leaves room for rear-access wiring in a 200 mm deep enclosure.