Through-hole resisT ors Flame-Proof & Non-Inductive Type Wirewound Resistors Normal & Miniature Style NKN Series FeATures Power Rating 1/2W, 1W, 2W, 3W, 4W, 5W, 7W Resistance Tolerance 5% T.C.R. 300ppm/C Flameproof Multi-layer Coating Meets UL-94V-0 Flameproof Feature Meets Overload Test UL-1412 iNTroDuCTioN DerATiNg Cur Ve The resistor element is a resistive wire which For resistors operated in ambient temperatures above 40C, power rating must be derated is wound in a single layer on a ceramic rod, in accordance with the curve below. with tinned connecting wires of electrolytic 40 70 200 275 C Rated Load (%) copper welded to the end-caps. The ends of 100 3W-7W the resistive wire are connected to the caps by 80 welding. The resistors are coated with layers of 1/2W-3WS 60 green color flame-proof lacquer. The 5th color 40 band is black to represent NKN series. 20 50 100 150 200 250 300 Ambient Temperature (C) DiMeNsioNs Unit: mm s TYle DiMeNsio N Normal Miniature l D h d NKN-50 NKN1WS 9.00.5 3.50.3 262.0 0.550.05 d NKN100 NKN2WS 11.51.0 4.80.5 352.0 0.80.05 NKN200 NKN3WS 15.51.0 5.30.5 332.0 0.80.05 H L D NKN300 5th color code: black NKN5WS 17.51.0 6.50.5 322.0 0.80.05 NKN400 NKN500 NKN7WS 24.51.0 8.50.5 382.0 0.80.0551 eleCTriCAl ChArACTerisTiCs Nor MAl s TYle s TYle NKN-50 NKN100 NKN200 NKN300 NKN400 NKN500 Power Rating at 40C 3W 4W 5W Power Rating at 70C 1/2W 1W 2W Maximum working voltage PxR Voltage Proof on Insulation 250V 400V Resistance Range 0.08 - 15 0.1 - 40 0.1 - 90 0.1 - 120 0.18 - 220 Operating Temp. Range -40C to +200C Temperature Coefficient 300ppm/C Note: Special value is available on request MiNi ATure s TYle s TYle NKN1Ws NKN2Ws NKN3Ws NKN5Ws NKN7Ws Power Rating at 40C 5W 7W Power Rating at 70C 1W 2W 3W Maximum working voltage PxR Voltage Proof on Insulation 250V 400V Resistance Range 0.08 - 15 0.1 - 40 0.1 - 90 0.1 - 120 0.18 - 220 Operating Temp. Range - 40C to +200C Temperature Coefficient 300ppm/C Note: Special value is available on request eNViroNMeNTAl ChArACTerisTiCs Per For MANCe Tes T Tes T MeTho D APPr Aise Shor t Time Overload IEC 60115-1 4.13 10 times rated power for 5 Sec. 2.0%+0.05 Voltage Proof on Insulation 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 No deterioration of Solvent Resistance of Marking IEC 60115-1 4.30 IPA for 50.5 Min. with ultrasonic 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 No evidence of flaming Accidental Overload Test IEC 60115-1 4.26 4 times RCWV for 1 Min. or arcing Note: Rated Continuous Working Voltage (RCWV) = Power Rating x Resistance Value or Max. working voltage listed above, whichever less. Revision: 201304