Product Description The MYS8-385/40-4P series is a modular surge protective device (SPD) designed for TN-S power distribution systems, featuring a "4+0" circuit configuration. Compliant with EN 61643-11 (Type 2) and IEC 61643-11 (Class II), it provides reliable protection against transient overvoltages caused by lightning strikes and switching operations. The device delivers a high nominal discharge current (8/20μs) of 40kA and a maximum discharge current of 60kA, with a