What this MCCB delivers for your panel
The Siemens SENTRON 3VA2010-5HN32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a rated continuous current Iu of 100 A at 40 °C through 50 °C, with a slight thermal derating curve starting at 55 °C (96.25 A) down to 85 A at 70 °C. Its interrupting capacity hits 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V — giving you real selectivity headroom for high-fault utility feeds or transformer secondaries. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves, and the built-in undervoltage release (UVR) lets you drop the breaker on a control signal or safety chain. No communication module, no ground-fault monitoring, no auxiliary contacts — this is a clean line-protection breaker sized for a 100 A bus. Mounts on a standard DIN rail or panel-mount backplate in a 105 mm wide by 181 mm tall by 86 mm deep footprint.
Selectivity and coordination notes
For a site electrical engineer building a selective coordination study: the 187 kA at 240 V and 121 kA at 415 V ratings mean this breaker can be installed downstream of a main breaker or transformer secondary with a high available fault current, and still coordinate — the ETU350's adjustable I²t and short-time delay bands give you enough curve separation to avoid nuisance tripping on a downstream fault. The 3-pole form factor and 800 V rated insulation voltage (Ui) suit it for 480Y/277 V or 600 V delta panels. The 16 W maximum power loss at rated current matters for enclosure thermal rise calculations — factor it into your panel cooling budget.