It carries a continuous rated current of 25 A across the full ambient temperature range from 40 °C to 70 °C, so you don't have to derate it for a warm panel — that 25 A holds all the way up to 70 °C. The 3-pole construction and 800 V rated insulation voltage suit it for 400 V and 690 V line feeds.
The ETU330 electronic trip unit handles the curve shaping and ground-fault detection; the unit supports summation current formation on the L-conductor for ground-fault monitoring.
The 3VA2125-0HM36-0AA0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that fits existing SENTRON panel cutouts and busbar systems. No undervoltage release or communication function on this variant; the trip indicator is not fitted, and there's no voltage-trigger option.
Ground-fault and protection functions
Grounding protection is built in — the product function includes grounding protection, and the ground-fault monitoring version uses summation current formation on the L-conductor. That means it can detect leakage currents by summing the phase currents, which is the typical approach for solidly-grounded systems. No separate measurement function or communication module on this order code.