ABB 2CDS381001R0044 S301P-C4 1P 4A 25kA DIN Rail Miniature Circuit Breaker (MCB)

With a 4 A rating, the ABB 2CDS381001R0044 S301P-C4 is a 1-pole miniature circuit breaker from the industrial-duty System pro M compact S300P series, using a C trip characteristic for AC/DC overload and short-circuit protection. It is rated 25 kA (Icn) under IEC 60898-1, with an IEC 60947-2 Icu of 100 kA at 230/240 V AC that reflects its heavier industrial build.

Technical Specifications

Certifications & Standards

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

Selection Notes

The 100 kA Icu is the IEC 60947-2 industrial figure; where compliance is assessed to IEC 60898-1, the governing Icn for this device is 25 kA. At 4 A, 2CDS381001R0044 suits small control circuits or instrument transformers rather than a branch circuit breaker. The S301P-C frame also covers higher currents up to 63 A, where the Icn drops to 15 kA - choose the current rating that matches the actual load, since oversizing wastes selectivity margin.