The JK250-200U is an over-current protection device with PTC resettable fuses manufactured by Jinrui Electronic Materials. It is a Through Hole product with a 5.1mm Pitch. This RoHS compliant part protects two-way equipment from over-current, short circuit, and other over-voltage damages. It acts as an effective and stable protection circuit with low resistance and non-linear characteristics. This product is suitable for both AC and DC circuits. It is simple to install and can be used for many applications such as UPS, LED, home appliances, and industrial machines.