What this MCCB is and what it does
The Siemens 3VA2010-6HN36-0KH0 is a SENTRON 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 through every temperature step in the evidence, so it's a genuine 100 A frame, not a derated 125 A. It's a 3-pole unit built for line protection, meaning it sits at the incoming feed to protect the distribution bus and downstream branch circuits. The interrupting ratings are substantial: 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 tells you this breaker is sized for high-fault-capacity industrial services — think transformer secondaries or large motor control centers where fault current runs high.
Auxiliaries and trip accessories
This variant ships with a shunt trip (STL) release and two auxiliary switches plus one trip alarm switch (HQ configuration). That means you can remotely trip the breaker from a safety circuit or E-stop chain, and you get status feedback — open/closed and tripped — back to the PLC or annunciator panel. The auxiliary switch design is built into the breaker, not a field-add-on kit, so the wiring is already accounted for in the 86 mm depth × 105 mm width × 181 mm height envelope. No undervoltage release on this order code, and no ground-fault monitoring module. If you need UVR or GF protection, that's a different variant in the 3VA family. The supplied basic switch is 3VA20106HN360AA0, which is the internal switching mechanism — the complete breaker assembly is what ships.
Physical fit and environmental limits
Mounts in a standard panel or enclosure on a mounting plate — it is a molded case breaker, not a DIN-rail snap-on unit, so plan for bolt-down installation. Dimensions: 181 mm tall, 105 mm wide, 86 mm deep. Operating temperature range from -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power loss is 13.5 W, which is modest for a 100 A frame — ventilation in the enclosure is still advisable if other heat sources are nearby. Trip indicator and voltage trigger are both present on this unit. No communication function — this is a standalone thermal-magnetic or electronic-trip MCCB, not a smart breaker with integrated metering or Modbus. For that, look at the 3VA2 with communication options.