The ABB S803U-K50 is a 3-pole miniature circuit breaker rated 50 A with a K trip curve, for 240 VAC applications. It mounts on a standard DIN rail, making it a direct fit for panel builds or retrofits where the existing breaker footprint is already DIN-rail based. The K curve means the magnetic trip threshold is higher than a B or C curve — typically 8 to 12 times rated current — so it tolerates the inrush of motor loads or transformer primaries without nuisance tripping, while still providing short-circuit protection.
S803U-K50 ABB Miniature Circuit Breaker, 50A, 3P, K Trip
MPNS803U-K50
ABB S803U-K50, miniature circuit breaker, 50A, 3-pole, K trip curve, 240 VAC, DIN rail mount, 0.91 kg.
$316.50Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Weight | 0.91 kgs |
Product details
Frequently asked questions
Where can I buy S803U-K50 and how do I get a price?
The S803U-K50 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.
MPN
S803U-K50