leaded resISTORS Flame-Proof Type Wirewound Resistors Normal & Miniature Style [ KNP Series ] FEATURES INTRODUCTION 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 DERATING CURVE 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 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 NP50S 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 55 ELECTRICAL CHARACTERISTICS Normal STYLE STYLE KNP-25 KNP-50 KNP100 KNP200 Power Rating at 40C KNP300 KNP400 KNP500 KNP700 3W 4W 7W Power Rating at 70C 1/4W 1/2W 1W Voltage Proof 250V 300V 400V Resistance Range (1%) 0.22 - 150 0.1 - 800 Resistance Range (5%) 0.05 - 200 0.03 - 800 0.015 - 2.2K 0.015 - 2.8K 0.02 - 7.5K Operating Temp. Range -40C to +200C Temperature Coefficient 300ppm/C 5W 2W 0.1 - 1.8K 0.1 - 2.8K 0.1 - 7.5K 0.1 - 6.5K 0.03 - 6.8K Note: Special value is available on request MINIATURE STYLE STYLE KNP50S KNP1WS KNP2WS KNP3WS Power Rating at 40C KNP5WS KNP7WS 5W 7W Power Rating at 70C 1/2W 1W 2W 3W Voltage Proof 200V 300V 400V Resistance Range (1%) 0.22 - 150 0.1 - 800 0.1 - 1.8K 0.1 - 2.8K 0.1 - 7.5K 0.1 - 6.5K Resistance Range (5%) 0.05 - 200 0.03 - 800 0.015 - 2.2K 0.015 - 2.8K 0.02 - 7.5K 0.03 - 6.8K Operating Temp. Range -40C to +200C Temperature Coefficient 300ppm/C Note: Special value is available on request ENVIRONMENTAL CHARACTERISTICS PERFORMANCE TEST TEST METHOD Short Time Overload IEC 60115-1 4.13 10 times rated power for 5 Sec. 2.0%+0.05 Voltage Proof IEC 60115-1 4.7 in V-block for 60 Sec., test voltage by type By type Temperature Coefficient IEC 60115-1 4.8 -55C to +155C By type Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >100M Solderability IEC 60115-1 4.17 2355C for 30.5 Sec 95% Min. coverage Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic No deterioration of coatings and markings Robustness of Terminations IEC 60115-1 4.16 Direct load for 10 Sec. in the direction of the terminal leads 2.5kg (24.5N) Damp Heat Steady State IEC 60115-1 4.24 402C, 90-95% RH for 56 days, loaded with 0.1 times RCWV 5.0%+0.05 Endurance at 70C IEC 60115-1 4.25 702C at RCWV for 1,000 Hr. (1.5 Hr. on, 0.5 Hr. off) 5.0%+0.05 Temperature Cycling IEC 60115-1 4.19 -55C Room Temp. +155C Room Temp. (5 cycles) 1.0%+0.05 Resistance to Soldering Heat IEC 60115-1 4.18 2603C for 101 Sec., immersed to a point 30.5mm from the body 1.0%+0.05 Accidental Overload Test IEC 60115-1 4.26 4 times RCWV for 1 Min. No evidence of flaming or arcing Note: Rated Continuous Working Voltage (RCWV) = APPRAISE Power Rating x Resistance Value