The Schneider Electric G12E3A80 is a GoPact MCCB 125 molded-case circuit breaker, 3-pole, rated 80 A at 40 °C with a TM-D thermal-magnetic trip unit. It provides overload protection (thermal) and short-circuit protection (magnetic) — the LI protection functions. Rated operational voltage is 415 V AC at 50/60 Hz, with a rated insulation voltage of 440 V AC, both per EN/IEC 60947-2. That's another SKU I don't need — no separate isolator required on this feeder.
Fixed mount on a backplate, accepts horizontal or vertical orientation. Dimensions: 130 mm high, 75 mm wide, 60 mm deep. IP20 finger-safe enclosure — fine for a closed panel, not for washdown. Ambient operating range is -20 to 55 °C; storage range -35 to 85 °C. Power dissipation per pole is 18.7 W at rated current — factor that into panel thermal calculations.