What it is and what it handles
The Siemens SENTRON 3VA2010-8HN32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for a continuous current of 100 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Its breaking capacity hits 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 — numbers that put it in the high-interrupting class for large transformer feeds or bus-tie applications where fault current runs high.
Trip unit and protection
Fitted with an ETU350 electronic overcurrent release — that means adjustable long-time, short-time, instantaneous, and ground-fault pickup, though this variant ships without ground-fault monitoring (the 'without' flag on the version). Rated insulation voltage is 800 V, and maximum power loss sits at 7.7 W, which keeps heat manageable inside a closed panel.
Mounting and environment
The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep — a footprint that fits standard SENTRON 3VA panel cutouts and busbar systems. Front protection is IP40, so it's fine for a clean indoor panel but not washdown duty. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.
Lifecycle and sourcing
It's a line-protection version (not a motor-protection or switch-disconnector variant), with no undervoltage release, no voltage trigger, and no communication module onboard — keep that in mind if your BOM expects those accessories.