What this MCCB is and what the ratings mean for fit
The Siemens SENTRON 3VA2010-5HN36-0HH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current with no derating across the full 40 °C to 70 °C operating range — meaning it holds its full 100 A rating even in a hot panel or enclosure without needing a size-up. Breaking capacity is 187 kA at 240 VAC, stepping down to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3 kA at 690 V — the curve tells you this breaker has the interrupting muscle for high-fault installations at low voltage, but at 690 V it's essentially a load-break switch, not a fault-interrupting device. Designed as line protection (not feeder or motor protection), this MCCB sits at the service entrance or main distribution point in a panel, sized for a 100 A bus.
Auxiliaries and releases built in
Factory-fitted with 2 auxiliary switches plus 1 trip alarm switch (HQ type) and a shunt trip release (STL) — so you get remote status indication and remote tripping capability without ordering separate accessory kits or opening the breaker cover. The basic switch assembly is order code 3VA20105HN360AA0 — if you ever need to replace just the switching mechanism, that's the service part number. Power loss at rated current is 13.5 W maximum — relevant for thermal budgeting inside a sealed enclosure with other heat sources.
Physical fit and environment
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — standard SENTRON 3VA2 frame footprint, so it drops into a panel cutout or mounting base designed for this frame size without panel rework. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C — suitable for unconditioned enclosures in most industrial environments.