What this MCCB carries — and where it fits
The Siemens SENTRON 3VA2110-6HN32-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current (Iu) and configured for line protection. The ETU350 electronic trip unit gives you adjustable overload and short-circuit protection curves — not a fixed thermal-magnetic snap. That matters when coordinating with downstream breakers or protecting a feeder that sees inrush without nuisance tripping. Breaking capacity runs from 242 kA at 240 V down to 5 kA at 690 V. At 415 V and 440 V it holds 187 kA, which covers most industrial distribution panels upstream of motor control centers. The 800 V rated insulation voltage (Ui) keeps it in the frame for 690 V line-to-line systems. This version ships with a shunt trip release (STL) for remote opening — the basic switch is 3VA2110-6HN32-0AA0 and the integrated auxiliary trip is 3VA9688-0BL32. No auxiliary contacts, no undervoltage release, no communication module. It is a straight line-protection MCCB with a remote-trip coil, sized for a panel where you need to kill the feeder from a PLC or E-stop circuit.
Thermal derating — the real current you get
The 100 A rating holds flat through 50 °C ambient. At 55 °C it derates to 96.25 A, at 60 °C to 92.5 A, and at 70 °C to 85 A. If your panel ambient runs hot — say a non-ventilated enclosure next to a furnace line — the 70 °C figure is the one to spec against. The maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C.
Panel fit — dimensions and power loss
The 3VA2110-6HN32-0JA0 measures 105 mm wide by 181 mm high by 86 mm deep. That 105 mm width for a 3-pole 100 A frame is standard for SENTRON 3VA2 — it rows cleanly on a DIN rail or bolted to a mounting plate. Maximum power loss is 10 W, so thermal rise inside a sealed enclosure is manageable without forced ventilation for a single unit.