leaded resISTORS Flame-Proof Type Wirewound Resistors Normal & Miniature Style [ KNP Series ] FEATURES Power Rating 1/4W, 1/2W, 1W, 2W, 3W, 4W, 5W, 7W Resistance Tolerance 1%, 5% T.C.R. 300ppm/C Flameproof Multi-layer Coating Meets UL-94V-0 Flameproof Feature Meets Overload Test UL-1412 INTRODUCTION DERATING CURVE The resistor element is a resistive wire which is wound in a single layer on a ceramic rod, tinned connecting wires of electrolytic copper are welded to the end-caps. The ends of the resistance wire and the leads are connected to the caps by welding. The resistors are coated with layers of green color flame proof lacquer. For resistors operated in ambient temperatures above 40C, power rating must be derated in accordance with the curve below. 40 70 Rated Load (%) 200 275 C 100 3W-7W 80 1/4W-3WS 60 40 20 50 100 150 200 250 300 Ambient Temperature (C) DIMENSIONS Unit: mm STYLE od H L oD Normal Miniature L oD H od KNP-25 KNP50S 6.30.5 2.40.2 282.0 0.550.05 KNP-50 KNP1WS 9.00.5 3.30.3 262.0 0.550.05 KNP100 KNP2WS 11.51.0 4.50.5 352.0 0.80.05 KNP200 KNP3WS 15.51.0 5.00.5 332.0 0.80.05 KNP5WS 17.51.0 6.50.5 322.0 0.80.05 KNP500 KNP7WS 24.51.0 8.00.5 382.0 0.80.05 KNP700 - 24.51.0 8.00.5 382.0 0.80.05 KNP300 KNP400 Note: KNP1WS ( for MB Type ) od = 0.80.05 mm DIMENSION 49 ELECTRICAL CHARACTERISTICS NORMAL STYLE STYLE KNP-25 KNP-50 KNP100 KNP200 KNP300 KNP400 KNP500 KNP700 Power Rating at 70C 1/4W 1/2W 1W 2W 3W 4W 5W 7W Dielectric Withstanding Voltage 250V 300V 400V Resistance Range 0.1 - 47 Operating Temp. Range -40C to +200C Temperature Coefficient 300ppm/C 0.1 - 100 0.1 - 330 0.1 - 560 0.1 - 1K MINIATURE STYLE STYLE KNP50S KNP1WS KNP2WS KNP3WS KNP5WS KNP7WS Power Rating at 70C 1/2W 1W 2W 3W 5W 7W Dielectric Withstanding Voltage 200V 300V 400V Resistance Range 0.1 - 47 0.1 - 330 0.1 - 560 0.1 - 1K Operating Temp. Range -40C to +200C Temperature Coefficient 300ppm/C 0.1 - 100 Note: Special value is available on request ENVIRONMENTAL CHARACTERISTICS PERFORMANCE TEST TEST METHOD Short Time Overload JIS-C-5202 5.5 2.5 times RCWV for 5 Sec. 2.0%+0.05 Dielectric Withstanding Voltage JIS-C-5202 5.7 in V-Block for 60 Sec. By type Temperature Coefficient JIS-C-5202 5.2 -40C to +200C By type Insulation Resistance JIS-C-5202 5.6 in V-Block >100M Solderability JIS-C-5202 6.5 2605C for 50.5 Sec. 95% Min. coverage Resistance to Solvent JIS-C-5202 6.9 IPA for 1 Min. with ultrasonic No deterioration of coatings and markings Terminal Strength JIS-C-5202 6.1 Direct load for 10 Sec. in the direction of the terminal leads 2.5kg (24.5N) Load Life in Humidity JIS-C-5202 7.9 402C, 90-95% RH at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) 5.0%+0.05 Load Life JIS-C-5202 7.10 70C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) 5.0%+0.05 Temperature Cycling JIS-C-5202 7.4 -55C Room Temp. +155C Room Temp. (5 cycles) 1.0%+0.05 Resistance to Soldering Heat JIS-C-5202 6.4 35010C for 30.5 Sec. 1.0%+0.05 Overload Flame Retardant JIS-C-5202 7.12 4 times RCWV for 1 Min. No evidence of flaming or arcing Note: Rated Continuous Working Voltage (RCWV) = APPRAISE Power Rating x Resistance Value