ABB S801S-K25 MCB, 1P K 25A, 50 kA

That K-curve means it's designed for inductive loads — motors, transformers, solenoid valves — where the inrush current is higher than a resistive load but not as extreme as a motor-start. The magnetic trip threshold sits between 8 and 12 times rated current, so it holds through a motor's starting surge but clears a hard fault fast. The 50 kA interrupting rating at 230 VAC is the headline number here. Most 1-pole MCBs in this form factor top out at 6–10 kA; this one handles an order of magnitude more. Mounting is standard DIN rail (35 mm per EN 60715), so it clips into any panel enclosure. The 1-pole form factor means it occupies one module width — roughly 17.5 mm — which matters when you're packing 24 circuits into a 600 mm wide cabinet.