What this MCCB is and what the ratings mean for fit
The Siemens 3VA2010-6HL32-0JA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient range from 40 °C through 70 °C — no derating needed up to that ceiling. That flat thermal curve is the spec that decides the panel fill: if your bus is sized for 100 A and the enclosure runs warm, this breaker holds its rating without a bump in frame size. Three poles, line-protection design (not motor-protection curve), with an integrated shunt trip (STL) for remote tripping. The shunt trip is factory-fitted — no field-kit wiring, no auxiliary power module to source separately. If your safety circuit or emergency-stop chain requires a voltage-triggered opening, this variant delivers it out of the box. Breaking capacity is the other headline: 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 is high-end for a 100 A frame — it tells you this breaker is meant for high-fault locations like a transformer secondary or a large bus riser where the available fault current is serious. The 3 kA at 690 V is a reminder that this is a 3-pole breaker on a 690 V line; if your system runs 690 V phase-to-phase, the interrupting rating drops sharply, so verify coordination with the upstream device.
Sourcing and lifecycle — active, no end-of-life signal
Rated insulation voltage is 800 V, and the maximum power loss is 13.5 W — a number to check against your enclosure's thermal budget if you're packing multiple breakers in a small cabinet. The shunt trip coil itself draws power only during the trip event, not continuously, so it adds negligible heat to the steady-state calculation.
Panel fit and wiring notes
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. That 86 mm depth is the front-to-back dimension including the arc chamber and terminals — important when the back panel has a gland plate or a rear-mounted busbar that limits protrusion. The 105 mm width is standard for a 3-pole 100 A frame in the 3VA2 family; it occupies three 35 mm DIN spaces if mounted on a DIN rail, or bolts directly to a mounting plate via the factory slots. No undervoltage release, no ground-fault monitoring, no communication function on this variant. If your spec calls for a UVR or a ground-fault module, you need a different suffix — this is a straight line-protection breaker with a shunt trip only. The auxiliary release is a shunt trip (STL); verify the control voltage matches your trip circuit before wiring.