The MGN61854 is a 32 A, 2-pole DC miniature circuit breaker from the Schneider Electric Multi9 C60H-DC range. It is rated for DC networks with a C curve (8.5 x In magnetic trip) and a breaking capacity of 20 kA Icu at 220 V DC per EN/IEC 60947-2. This is the part to specify when you need a DC-rated MCB that clips onto a DIN rail for distribution panels.
The C curve (8.5 x In magnetic trip) means it tolerates moderate inrush, typical for resistive and general DC loads, but will trip faster on a hard short than a B curve would. Rated operational voltage options cover 220 V DC, 250 V DC, 440 V DC, and 500 V DC — the breaking capacity drops as voltage rises (10 kA at 440 V DC, 6 kA at 500 V DC). For a 250 V DC bus, you get the full 20 kA.
Clip-on DIN rail mount, 36 mm wide (4 x 9 mm pitches), 81 mm tall, 73 mm deep. Fits standard modular enclosures. IP20 finger-safe with the modular enclosure providing IP40.
