Asea Brown Boveri 2CSB803001R3630 Circuit Breaker

ABB 2CSB803001R3630 is a three‑pole residual current device module, the DDA803AC‑63/0,3 variant, designed for ABB’s S800 modular distribution systems. It delivers earth‑fault protection by tripping when the residual current exceeds 300 mA (0.3 A) while rated for 63 A, Type AC performance suitable for standard alternating‑current circuits. The 2CSB803001R3630 identification corresponds to a DDA803AC‑63/0,3 device, intended to be integrated within ABB's modular panel builds to provide selective residual current protection for three‑phase circuits. Typical applications include feeders and branch circuits in industrial or commercial electrical installations where ABB S800 infrastructure is used, helping to quickly isolate fault conditions and reduce risk of electric shock or equipment damage. As a 3P RCD block, it protects all three live conductors plus neutral and is part of ABB's DDA803AC family of residual current devices with an AC sensing requirement, 63 A nominal current, and a 300 mA trip threshold, aligning with common safety standards for earth‑leakage protection in distribution boards.