The 18 mm width occupies one modular unit on standard DIN rail, and the IP20 enclosure with IP40 in the handle range suits enclosed panel use.
Rated at 400 V AC and 60 V DC, this MCB covers single-phase AC loads and low-voltage DC control circuits. The D-curve trips between 10× and 20× In, so it clears fast on hard shorts but rides through the magnetizing inrush of a small transformer or a DC solenoid. The 10 kA (EN 60898) and 15 kA (IEC 60947-2) ratings mean it can interrupt faults up to those levels without upstream coordination — a 10 kA SCCR is typical for a panel fed from a 100 kVA transformer; the 15 kA IEC rating gives headroom for higher-fault points. Insulation voltage of 440 V AC confirms the internal creepage distances are sized for 400 V line-to-line panels.