ABB 2CDS383001R0204 S303P-C20 3P 20A 25kA DIN Rail Miniature Circuit Breaker (MCB)

The ABB 2CDS383001R0204 is a 3-pole S300P miniature circuit breaker (S303P-C20) rated at 20 A with a Curve C tripping characteristic and a 25 kA breaking capacity at 415 V AC. It protects DIN-rail circuits against overload and short circuits according to IEC/EN 60898-1 and IEC/EN 60947-2, and carries a UL 1077 interrupting rating of 10 kA at 480Y/277 V AC.

Technical Specifications

Certifications & Standards

• IEC/EN 60898-1
• IEC/EN 60947-2
• UL 1077
• CSA 22.2 No. 235

Selection Notes

The 20 A rating places this breaker in the lower-mid range of the S303P-C family, where Icn holds at 25 kA at 415 V AC up to 25 A before dropping as the frame current rises further. That 25 kA figure covers most LV sub-distribution boards without needing a current-limiting upstream device. Curve C's 5-10 x In magnetic trip threshold suits loads with moderate inrush - small motors, transformers, ballasts - rather than purely resistive circuits, where Curve B would be the tighter choice. The 3-pole configuration switches all three phases without disconnecting the neutral, the standard choice for balanced three-phase loads on a TN-S system.