What this breaker brings to the panel
The C11H3TM025B is a ComPacT NSXm 63H frame 3-pole circuit breaker rated 25 A at 40 °C with a TM-D thermal-magnetic trip unit.
If your panel runs hotter, you'll need to derate per the thermal curve — the TM-D bimetallic strip responds to both load current and ambient heat. The 3-pole version covers three-phase loads — pumps, conveyors, lighting circuits — and the toggle control gives a clear on/off indication.
The 81 mm width and 137 mm height fit standard DIN-rail enclosures, though it's not a DIN-rail snap-on; it bolts to the backplate. Connection pitch is 35 mm with spreaders, 27 mm without — that matters when you're laying out busbars or compression lugs. Front connections top and bottom keep wiring accessible. IP40 front face and IK07 impact rating mean it's fine for a locked electrical room but not for washdown zones.
