FKN400

Wirewound Resistors Through-hole resistors Fusible & Flame-Proof Type Normal & Miniature Style [ FKN Series ] INTRODUCTION The resistor element is a resistive wire which is wound in a single layer on a ceramic rod, with tinned connecting wires of electrolytic copper welded to the end-caps. The ends of the resistive wire are connected to the caps by welding. The resistors are coated with layers of green color flame-proof lacquer. Overload protection without risk of fire. Wide range of overload currents. DIMENSIONS ød H L øD 5th color code: white Note: FKN1WS ( for MB Type ) ød = 0.8±0.05 mm FEATURES Power Rating Resistance Tolerance T.C.R. Flameproof Multi-layer Coating Meets Flameproof Feature Meets Overload Test 1/2W, 1W, 2W, 3W, 4W, 5W, 7W ±1%, ±5% ±350ppm/°C UL-94V-0 UL-1412 DERATING CURVE For resistors operated in ambient temperatures above 40°C, power rating must be derated in accordance with the curve below. Rated Load (%) 40 70 100 80 60 155 275 °C 3W-7WS 1/2WS-3WS 40 20 50 100 150 200 250 300 Ambient Temperature (°C) FUSING CHARACTERISTICS R≤2.0Ω Fusing time within 60 seconds at 36 times of rated power R>2.0Ω Fusing time within 60 seconds at 25 times of rated power Fusing residual resistive value at least 100 times rated resistance STYLE Normal FKN-50 FKN100 FKN200 FKN300 FKN400 FKN500 DIMENSION Miniature L FKN50S 6.3±0.5 FKN1WS 9.0±0.5 FKN2WS 11.5±1.0 FKN3WS 15.5±1.0 FKN5WS 17.5±1.0 FKN7WS 24.5±1.0 øD 2.5±0.3 3.5±0.3 4.6±0.5 5.2±0.5 6....