What this MCCB is and what the ratings mean
The Siemens SENTRON 3VA2010-6HN36-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, meaning it sits at the incoming feed of a panel or distribution board to protect cables and busbars from overloads and short circuits. The headline breaking capacity of 242 kA at 240 V tells you it can safely interrupt a fault current up to that level without welding contacts or cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers. At 415 V and 440 V it still holds 187 kA, and at 500 V it delivers 121 kA; only at 690 V does it drop to 4 kA, so keep it on 400 V-class systems for full fault-clearing confidence. Rated continuous current Iu is 100 A, and it holds that rating flat from 40 °C up to 50 °C ambient — no derating needed in a typical ventilated enclosure. At 55 °C it derates to 96.25 A, at 60 °C to 92.5 A, at 65 °C to 88.75 A, and at 70 °C to 85 A. If your panel runs hot, size the load accordingly. The overcurrent release is an ETU350 electronic trip unit — adjustable thermal-magnetic or electronic protection curves depending on the variant. This unit includes a shunt trip (STL) for remote tripping, but no undervoltage release, no auxiliary contacts, no ground-fault monitoring, and no communication function. It's a straightforward line-protection breaker: trip on overcurrent, remote shunt trip when you need it, no extras.
Panel fit and integration
The 3VA2010-6HN36-0HA0 measures 105 mm wide, 181 mm high, and 86 mm deep — a standard SENTRON 3VA frame size that mounts on a DIN rail or directly to a backplate. The 105 mm width means it occupies three 35 mm DIN-rail modules, so plan your enclosure rail length accordingly. No auxiliary contacts or communication module means no extra wiring for status feedback; the shunt trip requires a separate control voltage (typically 110–415 V AC/DC, verify from the trip coil rating).