Its 2 A rating makes it a fit for protecting small-branch circuits — think lighting groups, control transformers, or signal power supplies — where the load current stays under 2 A and the wire gauge is light. Trip Curve C means it tolerates moderate inrush currents (5–10× rated) before tripping, so it works on circuits with small motors, contactor coils, or capacitive loads that pull a brief startup surge without nuisance opening.
Voltage and interrupting ratings — what they mean on site
Rated 277 VAC, this MCB handles single-phase line-to-neutral circuits common in North American lighting panels or 277 V control loops. The 125 VDC rating covers DC control circuits or battery-backed supplies. The higher DC rating is a bonus for industrial DC bus protection.
Two-pole width (roughly 36 mm) leaves room for adjacent breakers or accessories in the same row. No special busbar or comb needed for common feed — standard pin-type busbars fit the S200 family.