Line protection MCCB, 80 A, 4-pole — what the ratings mean for fit
The Siemens SENTRON 3VM1080-3ED46-0AA2 is a 4-pole molded case circuit breaker rated for line protection duty, carrying 80 A continuous current (Iu) at 40 °C ambient. That 80 A holds flat through 50 °C — useful if the breaker sits near other heat sources in a crowded enclosure — then derates to 78 A at 55 °C, 77 A at 60 °C, 75 A at 65 °C, and 74 A at 70 °C. The TM210 thermal-magnetic release gives fixed thermal and magnetic trip thresholds; no interchangeable trip unit, so the breaker's protection curve is set at the factory for the 80 A frame. Breaking capacity is specified at four voltage levels: 76 kA at 240 V AC, 53 kA at 415 V AC, 32 kA at 440 V AC, and 7.5 kA at 500 V AC. That 76 kA at 240 V covers high-fault scenarios on 208/240 V secondary distribution; the 53 kA at 415 V is the figure to check for 400 V three-phase panels. Rated insulation voltage is 690 V, so the breaker is electrically rated for 690 V systems even though the breaking ratings top out at 500 V. The 3VM1080-3ED46-0AA2 measures 101.6 mm wide by 130 mm tall by 70 mm deep — a standard SENTRON 3VM footprint that fits existing panel cutouts and busbar arrangements for this frame size. Front protection is IP40, meaning tools or fingers won't contact live parts from the front, but the breaker is not sealed against dust ingress or washdown. Storage range spans -40 °C to 80 °C; operating ambient runs -25 °C to 70 °C.
Integration notes for the panel builder
The 4-pole configuration suits three-phase-plus-neutral or three-phase-plus-switched-neutral applications. No auxiliary contact blocks are pre-installed (zero CO contacts for auxiliary contacts), but the 3VM frame accepts field-installable accessory kits — order those separately if you need status signaling. No motor drive option, no ground fault monitoring, no communication module on this variant; it is a straight electromechanical breaker. Maximum power loss is 26 W at rated current — factor that into enclosure thermal calculations, especially if multiple breakers are ganged in a sealed cabinet. The TM210 release is fixed; if your coordination study calls for a different trip curve or adjustable magnetic pickup, step up to the 3VA series which offers interchangeable electronic releases.