What this MCCB is, and what the ratings mean for your panel
The Siemens 3VA2010-8JP36-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous current rating of 100 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting when the breaker sits next to other heat sources. The ETU550 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. That matters for selectivity coordination downstream — you can shape the trip response to keep a branch fault from taking out the whole feeder. The communication function onboard means this breaker can report status and trip events to a higher-level control system, which is useful for remote monitoring or predictive maintenance on a critical line. Breaking capacity is the headline spec for an MCCB: this one delivers 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. Those numbers tell you it can safely interrupt a fault at the available short-circuit current of your panel's transformer or upstream feed — if your plant's service entrance can deliver 200 kA at 480 V, this breaker handles it. The 800 V rated insulation voltage confirms it's rated for 690 V nominal systems with margin. The 3-pole construction suits three-phase feeders. Front-side IP40 protection means tools or fingers won't contact live parts from the front, but the breaker is not sealed against dust ingress — it belongs inside an enclosure, not in a washdown area.
Panel fit and footprint
The breaker measures 86 mm deep × 105 mm wide × 181 mm high. That 105 mm width is the standard 3-pole MCCB footprint for the 3VA frame size — it occupies one 105 mm-wide slot on the DIN rail or mounting plate. Depth of 86 mm means it clears most standard 200 mm-deep enclosures with room for wiring gutters. If you are replacing an older 3VA1 frame breaker, check the mounting hole pattern; the 3VA2 frame shares the same 105 mm width but verify the depth clearance against your existing backpanel.