What this MCB does on a DC bus
At 2 A rated current, this is a branch-circuit or load-side protector, not a main feeder breaker. The 2-pole configuration on a DC system gives you both positive and negative line protection in one 18 mm wide package — that's a single module width on a DIN rail, so it fits tight panel layouts without eating up rail space.
RoHS compliance is confirmed effective February 28, 2022. No UL or IEC certification numbers are listed in the available data, so verify local code acceptance if your jurisdiction requires a specific mark.
Width is 1 MW (18 mm) — one standard modular unit on a DIN rail. The 2-pole design occupies that single slot, so it's space-efficient for multi-circuit DC distribution boards. Packaging dimensions are 93 x 21 x 83 mm, which is the shipping carton size; the installed depth is less once clipped onto the rail.