The K-curve trips magnetically between 8 and 12 times rated current — designed for inductive loads like motors, transformers, and solenoid valves where inrush current would nuisance-trip a B- or C-curve breaker. On a 277 VAC line it interrupts faults up to 6 kA; on a 500 VDC circuit it handles 10 kA, covering most industrial control panels and DC distribution. The 2-pole form factor fits a single module width per pole, so it occupies two 18 mm slots in a distribution board.
ABB S202MUC-K50 MCB 2P K 50 A, DIN Rail
MPNS202MUC-K50
ABB S200MUC series, miniature circuit breaker MCB, 2-pole, Trip Curve K, 50 A, 277 VAC / 500 VDC, 6 kA AC / 10 kA DC interrupting, DIN-rail mount.
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 |
|---|---|
| Amps | 50 |
| Type | Trip Curve K |
| Poles | 2 |
| Mounting | DIN Rail |
| Volts AC | 277 |
| Volts DC | 500 |
| Breaking capacity | 6 kA |
| Interrupt rating DC | 10 kA |
Product details
Frequently asked questions
What is the interrupting rating of the S202MUC-K50?
6 kA at 277 VAC and 10 kA at 500 VDC.
Where can I buy the S202MUC-K50?
This part is sourced to order against an RFQ through independent distribution; availability and pricing are confirmed at quote time.
What does Trip Curve K mean on this breaker?
K-curve trips magnetically at 8 to 12 times rated current, making it suitable for inductive loads such as motors and transformers where inrush current would nuisance-trip B- or C-curve breakers.
MPN
S202MUC-K50