The 20D271K with Varistors 225V 455V 6.5KA Plugin RoHS, manufactured by Ruilongyuan, is an electronic part which is used to provide overvoltage and overcurrent protection, as well as noise suppression. It features a varistor voltage of 225V to 455V and varistor current of 6.5KA. It is a plug-in type and is RoHS compliant. It can be used in various power and communication applications.