That's the kind of rating that keeps a line from dropping when a downstream motor or feeder shorts. The TM-D trip unit gives you fixed thermal-magnetic protection — no adjustment, no fuss. That's fine for a fixed-load distribution circuit where you know the draw and don't need field tweaks. It's Category A (no intentional short-time delay), so it clears fast on a hard fault. The toggle handle and green flag for auxiliary contact presence give a quick visual check without pulling the cover.
It's 108 mm wide, 137 mm tall, 80 mm deep, and takes 12 modules of 9 mm pitch. That's a compact footprint for a 4-pole 25 A breaker with 70 kA interrupting capacity. No DIN rail; you bolt it to the panel backplate. Connection pitch is 35 mm with spreaders, 27 mm without — that matters when you're laying out busbar runs in a tight enclosure. Neutral is on the left.
Environmental and durability
IP40 enclosure keeps out tools and wires over 1 mm — fine for a panel interior, not for washdown. IK07 impact rating means it can take a knock from a dropped tool. Operating altitude 2000 m without derating, 5000 m with derating. Mechanical durability is 20,000 cycles; electrical durability varies by load: 20,000 cycles at 440 V at In/2, 10,000 at 440 V at In, 10,000 at 690 V at In/2, 5,000 at 690 V at In. That's a solid service life for a distribution breaker — not a switching contactor, but it'll handle routine on/off for years in a panel.