NXBL-40 series Residual Current Operated Circuit Breaker (RCBO) is a low-voltage protection device integrating multiple protection functions. It is mainly used in low-voltage terminal distribution systems. The product provides **overload protection, short-circuit protection, and residual current protection**, effectively reducing risks caused by electrical leakage, circuit overload, and short-circuit faults, while improving personal safety and equipment reliability. NXBL-40 complies with **GB/T 16917.1 and IEC 61009-1 international standards** and has obtained **CCC and CE certifications**, ensuring reliable electrical performance and safety protection. The series provides multiple rated current options including **6A, 10A, 16A, 20A, 25A, 32A, and 40A**, with residual operating current options of **10mA and 30mA**, meeting different requirements for leakage protection applications. With a compact design, NXBL-40 supports **1P+N pole configuration**. It provides a mechanical endurance of up to **20,000 operations** and an electrical endurance of **10,000 operations**. The rated short-circuit breaking capacity reaches **4500A**, making it suitable for residential distribution boards, commercial buildings, industrial control cabinets, and other low-voltage applications.