What this MCCB is and what it carries
The Siemens SENTRON 3VA2010-6HN32-0AF0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to the 70 °C mark. It is designed for line protection, meaning it sits at the feeder or main distribution point in a panel, not downstream at a specific load. The insulation voltage is rated 800 V, so it handles 480/600 V distribution systems comfortably. Breaking capacity is the headline here: 242 kA at 240 VAC, 187 kA at 415/440 V, 121 kA at 500 V, and 3 kA at 690 V. That 242 kA at 240 V is a very high interrupting rating — it means this breaker can safely clear a fault on a high-capacity transformer secondary without needing a current-limiting fuse upstream. For 480 V panels, the 187 kA at 440 V is the relevant figure; it covers most industrial service-entrance applications with substantial fault current.
Physical fit and panel integration
Dimensions: 105 mm wide, 181 mm tall, 86 mm deep. The 105 mm width is standard for a 3-pole MCCB in this frame size — it occupies three 35 mm DIN module positions if mounted on a DIN rail, though MCCBs of this class are typically bolted directly to a busbar or mounting plate. Depth of 86 mm means it clears most standard enclosure depths (200 mm or deeper) without issue. The auxiliary switch configuration is 1 auxiliary + 1 trip alarm switch HQ, which provides both a status mirror and a separate fault indication contact — useful for remote monitoring or PLC input.
Electrical characteristics and thermal behavior
Maximum power loss is 13.5 W at rated current. That is moderate for a 100 A frame — expect some heat in a densely packed panel, but nothing that forces oversized ventilation unless the enclosure is sealed and small. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The trip indicator is present, so after a fault event you get a visual flag without needing to reset the breaker to check.