The K-curve means it trips magnetically between 8 and 12 times rated current (In). That puts it between the B and C curves on short-circuit sensitivity — it tolerates the inrush of motor starters and small transformers without nuisance tripping, but still clears a hard fault fast enough for most distribution coordination schemes.
ABB S201-K3A Miniature Circuit Breaker, K-Curve 3A
MPNS201-K3A
ABB, System pro M compact, miniature circuit breaker, S201-K3A, K-curve 3 A, DIN rail mount.
$71.49Ref. price · indicative, final on quote
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.14 kgs |
Product details
Frequently asked questions
What is the S201-K3A used for?
It is a 3 A K-curve miniature circuit breaker for DIN rail mounting, used to protect branch circuits with motor or transformer loads where a moderate inrush tolerance is needed.
Where can I buy the S201-K3A?
The S201-K3A is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
How does the S201-K3A compare to the SH201T-C16?
The SH201T-C16 is a different form factor — System pro T compact, 0.06 kg vs 0.14 kg — and a C-curve 16 A rating. The S201-K3A is a K-curve 3 A breaker from the System pro M series. They are not drop-in replacements; the panel footprint and trip characteristics differ.
MPN
S201-K3A