The S803U-K80 is a 3-pole miniature circuit breaker rated at 80 A continuous, with a Trip Curve K characteristic — meaning it's designed to tolerate the inrush of inductive loads like motors and transformers without nuisance tripping, while still clearing faults fast. The 50 kA interrupting capacity at 240 VAC gives it serious fault-current headroom, suitable for high-capacity sub-distribution or industrial panel feeders where SCCR coordination matters.
Deployment context
The 3-pole form factor handles three-phase circuits up to 240 VAC line-to-line.