The Schneider Electric C10S3D is a ComPacT NSX100S DC basic frame circuit breaker — a 3-pole, 100 A frame unit rated for 100 kA Icu at 750 V DC per IEC 60947-2. This is the bare frame without a trip unit, so you pair it with a separate electronic or thermal-magnetic trip module to set the protection curve. The 100 kA interrupting rating at 750 V DC is the headline number here: it clears high-fault DC circuits without cascading upstream, which matters for battery banks, DC bus distribution, and UPS output protection where fault currents can run high.
Breaking capacity and duty
Breaking capacity is rated at 100 kA Icu across multiple DC voltage configurations: 250 V DC in single-pole, 24...125 V DC single-pole, 500 V DC two-pole, and 750 V DC three-pole. That's unusual for DC breakers and tells you this is built for mission-critical DC distribution where you need the full interrupting capability to be available after a fault event.
Fixed mount on a backplate, front-connected both top and bottom. IP40 front face, IK07 impact resistance.
Listed as current production. Complies with EN/IEC 60947-2, suitability for isolation marked yes. Overvoltage category III, rated impulse withstand voltage 8 kV. Electrical shock protection Class II on the front face. Electrical durability runs 10,000 cycles at half rated current (In/2) across all voltage levels, 5,000 cycles at full rated current.