... Certification 2,LIUSHI SPD 3,Customer first,sincere cooperation Surge-protector (SPD,circuit breaker,mcb,rccb,rcbo)Key words : Class ... Device,Surge ProtectionProduct introduce and application: SUN-type surge protector(hereinafter referred to as SPD)adapted to AC,mainly used ... such as protected model.SUN-based high quality surge protector to use non-linear components and low residual voltage, ...