What this 6 A Curve D MCB does in the panel
The ABB S201-D6 is a 1-pole miniature circuit breaker rated 6 A with a Trip Curve D characteristic, meaning it tolerates a brief inrush up to 10–20× rated current before tripping — sized for motor and transformer starts where a standard Curve C would nuisance-trip on the magnetizing surge. Snaps onto standard DIN rail — the finger-safe terminals accept multi-function wiring, and the 1-pole format frees up adjacent slots for additional phases or auxiliary contacts in a multi-pole group.
Regulatory and compliance coverage
Listed under UL 1077 and CSA 22.2 No. 235 — accepted for supplementary protection in North American panels. The thermal-magnetic trip mechanism provides both overload and short-circuit response in a single package.