The C16M1TM125 is a fixed-mount 1-pole ComPacT NSX160M moulded-case circuit breaker with a TM-D thermal-magnetic trip unit rated 125 A at 40 °C. It belongs to the ComPacT range and is designed for distribution applications per EN/IEC 60947-2. The breaking capacity is 40 kA Icu at 240 V AC and 85 kA Icu at 250 V DC, both conforming to IEC 60947-2. The 85 kA DC rating is unusually high for a 1-pole frame; it makes this breaker a candidate for DC bus or battery-string protection where high prospective fault currents exist. It is a Category A breaker (no intentional short-time delay), so it opens instantaneously on magnetic pickup. Overvoltage category IV means it is rated for installation at the origin of the installation (utility entrance or main distribution), not just downstream subpanels.
Mounting and connections
Mounts fixed to a backplate in either horizontal or vertical orientation. Width is 35 mm (one 35 mm pitch), height 161 mm, depth 86 mm. Both line and load connections are front-accessible — no rear bus adaptors needed. The 35 mm connection pitch matches standard DIN-rail terminal blocks for straightforward panel wiring. IP40 enclosure protection (tools and small wires only, no water ingress) and IK07 impact resistance.
Suitability for isolation is confirmed per EN/IEC 60947-2, meaning it provides a visible break and meets the isolation requirements for safe maintenance access downstream.
Durability and dissipation
Mechanical endurance is 20,000 cycles; electrical endurance is 20,000 cycles at 277 V at In/2 and 10,000 cycles at 277 V at full rated current In.