What the ratings mean for fit
The Siemens SENTRON 3VA2010-5HL36-0KC0 is a 3-pole molded case circuit breaker (MCCB) in the 3VA series, configured for line protection with an ETU320 electronic trip unit. The 100 A rated continuous current (Iu) holds steady across 40 °C to 50 °C ambient — no derating needed in a standard warm panel. Above that, it steps down: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. That thermal curve is what you check against your actual load current at the panel's internal temperature, not the room ambient. Interrupting capacity is the headline number that decides whether this breaker clears a fault without welding its contacts or venting arc gas into the enclosure. At 240 V it's rated 187 kA — that's a very high figure, sized for transformer-secondaries or large bus feeds where available fault current is substantial. At 415 V and 440 V it holds 121 kA, at 500 V it drops to 79 kA, and at 690 V it's 3.4 kA. The 800 V rated insulation voltage (Ui) means the internal creepage and clearance are designed for 690 V systems; the interrupting rating at that voltage is what governs the application.
Panel fit and integration
Footprint: 105 mm wide, 181 mm tall, 86 mm deep. That 105 mm width is three pole spaces wide on a standard DIN-rail or panel-mount grid — verify your enclosure's backplate layout if you're swapping from a different MCCB family, as the 3VA mounting hole pattern and bus-bar connection centers are specific to the SENTRON range. The 13.5 W maximum power loss at full load is heat that stays inside the enclosure; factor it into your thermal budget if the panel is densely packed.