Surge Protective Devices (SPDs)-the core technology underlying surge-protected power strips-originated in the late 19th century, initially serving to protect overhead power transmission lines. Their evolution progressed through various stages, including aluminum, oxide-film, pellet-type (1920s), and tubular (1930s) surge arresters, followed by silicon carbide arresters (1950s) and metal-oxide surge arresters (1970s). Since 1992, China has seen the large-scale introduction of industrial-standard, 35mm DIN-rail mountable, pluggable SPD modules (exemplified by German and French designs) and integrated box-type power surge protection units (exemplified by US and UK designs).
As end-user products, surge-protected power strips have also evolved from offering basic safety features to incorporating intelligent applications. Early models primarily provided fundamental surge protection, utilizing built-in components such as varistors and gas discharge tubes to guard against overvoltage. Subsequent developments introduced multi-layered protection mechanisms, integrating features like thermal fuses and transient voltage suppressor (TVS) diodes. Modern surge-protected power strips now incorporate smart technologies; they utilize built-in sensors for intelligent monitoring and early warning, support remote control and automated management via mobile apps, and offer data analysis and optimization capabilities. Furthermore, contemporary product designs and material selections place greater emphasis on aesthetics, environmental sustainability, and durability.