Co., LtdThe JK250-600U with PTC Resettable Fuses Through Hole, P=5.1mm RoHS is a two-pole or two-wire electronic part manufactured by Chinese company, Jinrui Electronic Materials Co., Ltd. It is a high-performance, over-current protection unit, designed to protect vulnerable circuits from excess current flow. The JK250-600U is made with polymeric thermal cut-off material, which is non-flammable, fast response, and heat resistant. Furthermore, it provides resettable and reliable over-current protection, and is capable of enduring numerous working cycles. The PTC resettable fuses have a wide operating temperature range and are RoHS compliant. The maximum working temperature of the JK250-600U is 105°C and its maximum interrupting current is 30A.