ABB 2CDS384001R0204 S304P-C20 4P 20A 25kA DIN Rail Miniature Circuit Breaker (MCB)

The ABB 2CDS384001R0204 is a 4-pole S300P miniature circuit breaker (S304P-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

At 20 A, this breaker still holds the family's 25 kA Icn at 415 V AC, the same figure carried from 10 A through 25 A before the S304P-C line steps down to 20 kA at 32 A. That 25 kA rating covers most LV sub-distribution boards without needing a current-limiting upstream device. Curve C's 5-10 x In magnetic trip threshold matches loads with moderate inrush rather than purely resistive circuits, where Curve B would be the tighter choice. The 4-pole configuration switches all three phases plus the neutral, which is needed on TN-C-S or TT systems where the neutral must also be isolated.