S203-B16 Miniature Circuit Breaker, 16A, 3P, Curve B, DIN Ra

The S203-B16 is a 3-pole miniature circuit breaker rated 16 A with a Trip Curve B characteristic, meaning it trips between 3 and 5 times rated current — designed for resistive or lightly inductive loads where inrush is low, like lighting circuits or control transformers, not motor starting. Its 6 kA interrupting rating at 277 VAC handles typical branch-circuit fault levels in commercial panelboards; the 10 kA DC rating at 110 VDC covers control-power supplies and battery-backed circuits. Mounts on standard DIN rail.