What it is and what it does
The Siemens 3VA2110-6HN36-0BH0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 100 A continuous current (Iu) across a 3-pole configuration. It's a line-protection device — meaning it's sized for feeder or main breaker duty in a distribution panel, not motor protection. The ETU350 electronic trip unit gives you adjustable overload and short-circuit curves, so you can coordinate it downstream without nuisance tripping. Breaking capacity runs from 242 kA at 240 V down to 5 kA at 690 V — the 242 kA figure at 240 V tells you this breaker handles high available fault current on the secondary side of a step-down transformer without needing a current-limiting fuse ahead of it. Rated insulation voltage is 800 V.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm tall, 86 mm deep — that's a standard 3-pole MCCB footprint for a 100 A frame. Mounts on a DIN rail or directly to a backplate via the screw terminals. The 86 mm depth matters when you're laying out a shallow enclosure; it clears most 200 mm deep wall-mount boxes. Comes with 2 auxiliary switches plus a separate trip alarm switch (HQ type) — that's three discrete contact blocks for status feedback to a PLC or annunciator panel. The undervoltage release (UVR) is built in, so the breaker drops on loss of control voltage — common for emergency-stop circuits or undervoltage protection schemes. Power loss is 12.5 W maximum — negligible for thermal budgeting in a standard panel, but worth noting if you're packing multiple breakers in a sealed, non-ventilated enclosure.
What the ratings mean for your choice
The 100 A rating holds flat from 40 °C up to 50 °C ambient — no derating needed in a typical 40 °C panel. At 55 °C it drops to 96.25 A, at 60 °C to 92.5 A, and at 70 °C to 85 A. If your enclosure sits in a hot mezzanine or near a furnace, use the 70 °C figure for your load calculation. Mechanical endurance is 20,000 operations. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The storage range governs shipping and warehouse conditions; the operating range is what matters once it's wired in the panel.