ABB S201-D32 Miniature Circuit Breaker, 32A, 1P, Curve D, 27

The ABB S201-D32 is a 32 A, single-pole miniature circuit breaker with a Trip Curve D characteristic, rated for 277 VAC and a 6 kA interrupting capacity. Curve D allows a short, high surge before tripping, so it won't nuisance-trip on startup the way a Curve B or C would. At 277 VAC, it provides line-to-neutral protection on wye systems. The single-pole format keeps it compact; you stack them per phase. The 6 kA interrupting rating is standard for secondary distribution panels fed from a larger upstream breaker or fuse.