What it is and what it does
The Siemens SENTRON 3VA2010-6HN32-0HA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across an ambient range of -25 °C to 70 °C — no derating needed up to that full span. Its interrupting capacity hits 242 kA at 240 V AC and still delivers 187 kA at 415 V and 440 V, dropping to 3 kA at 690 V. That kind of high-fault headroom means it can sit close to the transformer secondary or a large motor starter without worrying about cascading failures upstream.
Key ratings and what they mean for fit
Rated insulation voltage is 800 V, so the breaker is built for 690 V systems with margin. The shunt trip (STL) auxiliary release lets you remotely trip the breaker via a control signal — useful for emergency-stop circuits or interlocking with a safety relay. No undervoltage release, no ground-fault monitoring, and no communication module on this variant; it's a straightforward line-protection MCCB with a trip indicator absent. Panel footprint is 105 mm wide, 181 mm tall, 86 mm deep — standard for this frame size.