ABB 2CDS384001R0634 S304P-C63 4P 63A 15kA DIN Rail Miniature Circuit Breaker (MCB)

The ABB 2CDS384001R0634 is an S304P-C63 miniature circuit breaker for industrial DIN-rail installations rated 63 A across four poles with a C-curve trip characteristic. It carries a 15 kA breaking capacity under IEC 60898-1 and is additionally tested to IEC 60947-2, where it reaches 25 kA at 400 V AC, giving installers a wide margin against short-circuit fault currents on four-wire industrial branch circuits.

Technical Specifications

Certifications & Standards

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

Selection Notes

The C-curve trip setting on the 2CDS384001R0634 suits mixed resistive and inductive branch circuits, such as lighting panels and small motor feeders, with instantaneous tripping typically between 5 and 10 times In. Its 4-pole construction switches and protects all four conductors, which matters where the neutral must also be isolated on 3-phase-plus-neutral or 4-wire systems. The IEC 60947-2 Icu of 25 kA at 400 V AC gives more short-circuit margin than the IEC 60898-1 Icn of 15 kA, so the lower figure is the conservative one to check against upstream fault levels. Circuits with resistive-only loads and lower inrush are better served by a B-curve variant in the same S300P frame, while loads with higher starting currents call for a D-curve version.