ComPacT NSX160F DC — 160 A basic frame, 36 kA at 750 V DC
The C16F4D is a Schneider Electric ComPacT NSX160F DC basic frame — a 4-pole, fixed-mount circuit breaker frame rated 160 A at 40 °C, with a 36 kA Icu breaking capacity at 750 V DC per EN/IEC 60947-2. It ships without a trip unit (basic frame), so you select and install the appropriate electronic or Micrologic trip unit separately for the protection curve your DC distribution bus requires. The 36 kA Icu holds across the full DC voltage range: 250 V DC (1P), 500 V DC (2P), and 750 V DC (3P). The Ics (service breaking capacity) matches the Icu at 36 kA — meaning after clearing a fault at rated capacity the frame remains functional, not just safe. That matters for selectivity studies on DC bus feeds where fault current can hit 30+ kA. Rated insulation voltage (Ui) and operational voltage (Ue) both sit at 750 V DC, with an impulse withstand (Uimp) of 8 kV.
Fixed-mount on a backplate, 140 mm wide × 161 mm high × 86 mm deep. The 35 mm connection pitch and front-facing connections (both upside and downside) simplify busbar and cable routing in a standard panel layout. Neutral position is left; the toggle control is front-accessible. IP40 front face, IK07 impact resistance — adequate for enclosed industrial switchboards, not for washdown zones.
Mechanical durability is 10,000 cycles; electrical durability varies by load: 10,000 cycles at In/2 (250 V, 500 V, 750 V DC) and 5,000 cycles at full rated current. Maximum breaking time is 10 ms.