What the 100 A continuous rating and ETU550 trip unit mean for your panel
The Siemens 3VA2110-8JP42-0AA0 is a SENTRON 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 enclosure's thermal limit. That flat thermal curve simplifies panel sizing: you don't have to oversize the breaker or recalculate for a warm cabinet. The ETU550 is an electronic trip unit with communication function. Breaking capacity is the headline: 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 52.5 kA at 690 V. Those numbers tell you this breaker handles high-fault-current scenarios — suitable for main or large feeder positions in industrial switchgear where the available fault current is substantial.
Mounting and integration — 4-pole, 140 mm wide, IP40 front
At 140 mm wide, 181 mm tall, and 86 mm deep, this 4-pole MCCB fits standard SENTRON mounting patterns. The IP40 front protection means it's suitable for enclosed panel mounting where the front face is behind a door — not for washdown or outdoor exposure without an additional enclosure. Power loss is 7.7 W maximum — modest for a 100 A breaker, so internal cabinet heating from this device alone is manageable. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C.