The ABB S201MR-K4 is a 1-pole miniature circuit breaker from the S200MR series, rated 4 A with a Trip Curve K characteristic. It mounts on a standard DIN rail and interrupts fault currents up to 10 kA at 277 VAC — that's the full SCCR rating for this pole, so it handles branch-circuit faults without cascading upstream in a panel.
ABB S201MR-K4 MCB, 1-Pole, 4A, Curve K, 10kA, DIN Rail
MPNS201MR-K4
ABB S200MR series, S201MR-K4, 1-pole miniature circuit breaker, 4 A, Trip Curve K, 277 VAC, 10 kA interrupting rating, DIN rail mount.
$44.48Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Amps | 4 |
| Type | Trip Curve K |
| Poles | 1 |
| Mounting | DIN Rail |
| Volts AC | 277 |
| Breaking capacity | 10 kA |
Product details
Frequently asked questions
What is the interrupting rating of S201MR-K4?
10 kA at 277 VAC — that's the full fault-interruption capacity for this single pole, matching the S203-C10 in the same series.
MPN
S201MR-K4