ABB S200MUC series, 1-pole miniature circuit breaker, Trip Curve K, 4 A, 277 VAC / 250 VDC, 6 kA / 10 kA interrupting capacity.
| Parameter | Value |
|---|---|
| Amps | 4 |
| Type | Trip Curve K |
| Poles | 1 |
| Mounting | DIN Rail |
| Volts AC | 277 |
| Volts DC | 250 |
| Breaking capacity | 6 kA |
| Interrupt rating DC | 10 kA |
Rated 277 VAC / 250 VDC, so it covers single-phase line-to-neutral circuits in 277/480Y panels common in North American commercial lighting and small motor branch circuits. The 4 A continuous rating governs the load side: size it for a 4 A maximum resistive or inductive load after applying any ambient derating per IEC 60898.
Trip Curve K has a magnetic trip threshold of 8–12× rated current (32–48 A for this 4 A unit). That makes it suitable for circuits feeding inductive loads — motors, transformers, solenoids — where the inrush current is higher than a resistive load but short enough that a K curve holds, where a B or C curve might nuisance-trip.
The S201MUC-K4 is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer.
Yes — both are 1-pole DIN-rail breakers from the same S200MUC family with identical dimensions and terminal layout. The only difference is the current rating: the S201MUC-K4 is 4 A, while the S201MUC-K2 is 2 A. As long as the branch circuit and downstream load are rated for 4 A, the swap is mechanical.
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