What the ratings mean for fit
The S802S-UCB16 is a 2-pole high-performance miniature circuit breaker rated at 16 A with a Trip Curve B characteristic. Curve B trips between 3 and 5 times rated current, making it the right choice for resistive or lighting loads where inrush is low — not for motor circuits that need a C or D curve. The 50 kA interrupting capacity at both 480 VAC and 250 VDC means it can safely clear a fault up to that level without welding contacts or cascading upstream, which is critical for high-fault-capacity panels like those fed by a large transformer or generator. DIN-rail mounting means it snaps directly into a standard 35 mm rail inside the panel — no special adapter or bracket needed. The 16 A rating and 2-pole form factor cover single-phase or two-wire DC branch circuits in control panels, distribution boards, or sub-feed applications.