What this MCCB carries and where it fits
The Siemens 3VA1010-3ED32-0HC0 is a 3-pole SENTRON molded case circuit breaker rated for 100 A continuous at ambient temperatures from 40 °C to 50 °C, with a slight derating curve above that — 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C. That 100 A line is the one to size your feeder against; the thermal curve means you don't lose headroom in a warm panel unless it's pushing 55 °C+. Breaking capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That 75.6 kA at 240 V is the headline number — it clears a high-fault bolted short on a 240 V distribution bus without cascading upstream. For 400 V-class panels, the 52.5 kA at 415 V still covers most industrial service-entrance duty. Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with margin. The design is line protection — not motor protection — meaning thermal-magnetic or electronic trip curves optimized for feeder and branch-circuit fault clearing, not overload-only motor starting profiles.
Panel fit and mounting
Dimensions are 130 mm height, 76.2 mm width, and 70 mm depth. The 70 mm depth is the key clearance number for shallow backpan enclosures or tight gland-plate layouts — it's a compact 3-pole MCCB that fits standard DIN-rail or direct-mount footprints without protruding past 3 inches. Maximum power loss is 25 W at rated current. That's the heat you need to account for in a sealed enclosure — at 100 A continuous, 25 W per breaker adds up if you're stacking several on a bus.
Lifecycle and sourcing posture
The auxiliary switch configuration is 2 HQ auxiliary switches plus a shunt trip (STL) release. No undervoltage release, no ground-fault monitoring, no communication module on this variant. If you need those, the 3VA family has other order codes — this one is a clean line-protection breaker with shunt-trip capability.