What this MCCB carries
The Siemens SENTRON 3VA2010-5HN32-0DB0 is a 3-pole molded case circuit breaker rated for a continuous 100 A across the full ambient range from 40 °C to 70 °C — no derating needed up to the enclosure's internal temperature limit. Its ETU350 electronic trip unit provides adjustable overload and short-circuit protection curves, with a maximum breaking capacity of 187 kA at 240 V AC and 121 kA at 415 V / 440 V, dropping to 75.6 kA at 500 V and 3 kA at 690 V. The breaker includes an undervoltage release (UVR) as the auxiliary release design, plus two HP auxiliary switches for status feedback to the control system.
Panel fit and integration
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — standard SENTRON 3VA form factor for a 100 A frame. Mounts on a DIN rail or direct panel, with gland-plate clearance for the 86 mm depth. Power loss is 16 W maximum at rated load, which factors into enclosure thermal calculations when grouping multiple breakers. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C covers most plant environments.
Lifecycle and sourcing
The basic switch assembly carries its own order code 3VA20105HN320AA0, which is the replaceable switching mechanism inside the molded case.