NKN2WSJT-73-0R22

Through-hole resistors Flame-Proof & Non-Inductive Type Wirewound Resistors Normal & Miniature Style [ NKN Series ] FEATURES INTRODUCTION Power Rating 1/2W, 1W, 2W, 3W, 4W, 5W, 7W Resistance Tolerance ±2% , ±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 are connected to the caps by welding. The resistors are coated with layers of green color flame-proof lacquer. The 5th color band is black to represent NKN series. For resistors operated in ambient temperatures above 40°C, power rating must be derated in accordance with the curve below. Rated Load (%) 40 70 200 275 °C 100 3W-7W 80 1/2W-3WS 60 40 20 50 100 150 200 250 300 Ambient Temperature (°C) DIMENSIONS Unit: mm STYLE ød H L 5th color code: black øD DIMENSION Normal Miniature L øD H ød NKN-50 NKN1WS 9.0±0.5 3.5+0.6/-0.3 26±2.0 0.55±0.05 NKN100 NKN2WS 11.5±1.0 4.6+1.0/-0.5 35±2.0 0.8±0.05 NKN200 NKN3WS 15.5±1.0 5.2+1.0/-0.5 33±2.0 0.8±0.05 NKN5WS 17.5±1.0 6.5±1.0 32±2.0 0.8±0.05 NKN7WS 24.5±1.0 8.5±1.0 38±2.0 0.8±0.05 NKN300 NKN400 NKN500 45 ELECTRICAL CHARACTERISTICS Normal STYLE STYLE NKN-50 NKN100 NKN200 Power Rating at 40°C Power Rating at 70°C 1/2W 1W NKN300 NKN400 NKN500 3W 4W 5W 2W Maximum working voltage PxR Voltage Proof on Insulation 250V 400V Resistance Range 0.08Ω - 15Ω 0.1Ω - 40Ω Operating Temp. Range -40°C to +200°C Temperature Coefficient ±300ppm/°C 0.1Ω - 90Ω 0.1Ω - 120Ω 0.18Ω - 220Ω Note: Special value is available on request MINIATURE STYLE STYLE NKN1WS NKN2WS NKN3WS Power Rating at 40°C Power Rating at 70°C 1W 2W Maximum working voltage PxR Voltage Proof on Insulation 250V 400V Resistance Range 0.08Ω - 15Ω 0.1Ω - 40Ω Operating Temp. Range - 40°C to +200°C Temperature Coefficient ±300ppm/°C NKN5WS NKN7WS 5W 7W 0.1Ω - 120Ω 0.18Ω - 220Ω 3W 0.1Ω - 90Ω Note: Special value is available on request ENVIRONMENTAL CHARACTERISTICS PERFORMANCE TEST TEST METHOD APPRAISE Short Time Overload IEC 60115-1 4.13 10 times rated power for 5 Sec. ±2.0%+0.05Ω Voltage Proof on Insulation IEC 60115-1 4.7 In V-Block for 60 sec., test voltage as above table No Breakdown Temperature Coefficient IEC 60115-1 4.8 Between -40°C to +155°C By type Insulation Resistance IEC 60115-1 4.6 in V-block for 60 Sec. >100MΩ Solderability IEC 60115-1 4.17 245±5°C for 3±0.5 Sec. 95% Min. coverage Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 5±0.5 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 40±2°C, 90-95% RH for 56 days, loaded with 0.1 times RCWV ±5.0%+0.05Ω Endurance at 70°C IEC 60115-1 4.25 70±2°C at RCWV (or Umax., Whichever less) for 1,000 Hr. (1.5Hr.on, 0.5Hr. Off) ±5.0%+0.05Ω Temperature Cycling IEC 60115-1 4.19 -55°C  Room Temp.  +155°C  Room Temp. (5 cycles) ±1.0%+0.05Ω Resistance to Soldering Heat IEC 60115-1 4.18 260±3°C for 10±1 Sec., immersed to a point 3±0.5mm from the body ±1.0%+0.05Ω 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) =  Power Rating x Resistance Value or Max. working voltage listed above, whichever less. Revision: 2020