It handles 277 VAC at 6 kA interrupting capacity and 500 VDC at 10 kA — the DC rating is notably high for a compact MCB, making it a fit for DC distribution panels, UPS outputs, or solar combiner boxes where the string voltage stays under 500 VDC. The K-curve trips between 10× and 14× rated current, designed for inductive loads like motor starters and transformers that draw a high inrush without nuisance tripping on the branch circuit.
The K-curve means magnetic trip occurs at 10–14× In (400–560 A instantaneous), so it rides through the inrush of a 15–20 kVA transformer or a bank of DC power supplies without opening. The 500 VDC rating with 10 kA interrupting capacity is the standout: most 2-pole MCBs in this footprint top out at 125 VDC or 250 VDC, so if you are protecting a 400 VDC bus in a telecom or industrial DC system, this part holds the arc without welding contacts.
Two-pole width is 36 mm (2 modules of 18 mm each). The S200MUC family uses tunnel terminals accepting 1–25 mm² conductor — no special busbar or adapter needed for the 40 A feed. Wire strip length 12 mm, torque to 2.5 Nm. For DC circuits, observe polarity marking on the terminal; the internal arc chamber is polarized for DC interruption.