Fusible Metal Film Resistors Uniohm Corporation Fusible Metal Film Resistors FLAME-PROOF TYPE 1/4W，1/2W，1W，2W FR-25，FR-50，FR-100，FR-200 Series FR INTRODUCTION These Fusible Resistors contain both functions as being resistor in normal condition and turned into fuse while abnormal current comes in. The FR series Fusible Metal Film Resistors are manufactured by high thermal conductivity and specific gravity ceramic rods, and are coated with multilayers of green color flameproof lacquer. PERFORMANCE DERATING CURVE DIMENSIONS & SPECIFICATIONS FUSING CHARACTERISTICS 1