The ABB S203-C50 is a 3-pole miniature circuit breaker rated for 50 A continuous current, with a C-trip curve that provides a moderate inrush tolerance — it holds through the starting surge of motor loads and transformer banks, then clears on sustained overloads faster than a D-curve would. That 50 A rating, combined with the 6 kA interrupting capacity at 277 VAC line-to-neutral, means it can safely interrupt a fault up to that level without welding contacts or cascading damage upstream. The DIN rail footprint keeps it in standard panel layout, so it slots into the same backplane as the rest of the S200-series breakers.
ABB S203-C50 Miniature Circuit Breaker, 50A, 3P, Curve C
MPNS203-C50
ABB S203-C50, miniature circuit breaker, 3-pole, 50 A, C-trip curve, 277 VAC, 6 kA interrupting capacity, DIN rail mount.
$22.23Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Number of poles | 3 |
| Parameter | Value |
|---|---|
| Voltage (AC) | 277 |
| Current (A) | 50 |
| Parameter | Value |
|---|---|
| Interrupting rating (AC) | 6 kA |
| Parameter | Value |
|---|---|
| Mounting type | DIN Rail |
| Parameter | Value |
|---|---|
| Type | Trip Curve C |
Product details
Frequently asked questions
What is the interrupting capacity of S203-C50?
The S203-C50 has a 6 kA interrupting capacity at 277 VAC. That is the maximum fault current this breaker can safely clear under its rated voltage.
Where can I buy S203-C50?
The S203-C50 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
S203-C50