The S202-B20 is a 2-pole miniature circuit breaker rated 20 A with a Trip Curve B characteristic, meaning it trips instantaneously at 3–5 times rated current — suited for resistive or lightly inductive loads where inrush is low, like lighting circuits or control transformers.
Deployment context
DIN-rail mounted, so it fits a standard enclosure — common in panel builds for lighting distribution, small motor control centers, and branch circuit protection. The 2-pole format handles single-phase 240 V or two legs of a 480Y/277 V system.