What this MCCB delivers
The Siemens SENTRON 3VA2010-6HL42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection at 100 A continuous, with no derating across the full ambient range from 40 °C to 70 °C — all nine temperature points in the spec table show 100 A flat. That means the breaker holds its full rating inside a warm panel without a de-rate factor to track. The interrupting ratings climb to 242 kA at 240 V AC and 187 kA at 415 V AC, dropping to 3 kA at 690 V AC — the high short-circuit capacity at the lower voltages suits it for fault-current-heavy installations like transformer secondaries or large busway feeds.
Trip unit and protection logic
It carries an ETU320 electronic trip unit — that's the adjustable thermal-magnetic equivalent in the 3VA platform, giving you LSIG (long-time, short-time, instantaneous, ground-fault) protection curves. The N-conductor protection is configurable to OFF, 50%, or 100% of the phase rating, which matters when you're feeding a panel where the neutral load differs from the phase load. Rated insulation voltage is 800 V, and the maximum power loss at rated current is 13.5 W — a figure to check against your enclosure's thermal budget if you're stacking several breakers in a compact distribution board.
Physical fit and panel integration
Dimensions are 181 mm high, 140 mm wide, and 86 mm deep. The 140 mm width is the standard 4-pole MCCB footprint for the 3VA frame size; it mounts on a DIN rail or directly to a mounting plate with the supplied hardware. Front-face protection is IP40, so it's suitable for dry indoor panels but not washdown areas. No undervoltage release, no shunt trip, no communication module, and no trip indicator are fitted on this variant — it's a base-line protection breaker. If you need remote signaling or a UVR, you'd look at the -8HL42 or -7HK42 siblings that carry those options.