2029L中文资料SURFACE MOUNT PTC数据手册Littelfuse规格书

描述 Description

• The 2029L/3425L Series Resettable devices utilize a unique polymer-based, Positive Temperature Coefficient  (PTC) material to protect electrical circuits against over current conditions.
• In normal operation, the 2029L/3425L Series PTC has many conductive paths and a very low resistance. In an overcurrent condition, the temperature of the polymer material rises. This dramatically reduces the conductive paths resulting in an immediate rise in resistance. In this condition, the device provides circuit protection by significantly limiting the flow of current. However, once the cause of the initial overcurrent condition is eliminated, the 2029L/3425L Series PTC cools down and resets to a low resistance value permitting the normal current flow to resume.
• The 2029L/3425L Series are surface mountable.