PRODUCT BULLETIN KNP-SERIES WILLOW TECHNOLOGIES LTD. SHAWLANDS COURT, NEWCHAPEL ROAD LINGFIELD, SURREY, RH7 6BL, ENGLAND Tel. + 44 (0) 1342 835234 Fax. + 44 (0) 1342 834306 E-mail [email protected] Website http://www.willow.co.uk WIREWOUND RESISTORS FLAME-PROOF CERAMIC CORE: 75% ALUMINA LEAD: TIN PLATED COPPER CAP: TIN PLATED STEEL CAP COATING: SILICON WIRE: Cu-Ni OR Ni-Cr WIRE H L D Dimensional Correlation d TYPE RATED WATTS KNP-1/2W KNP-1W KNP-2W KNP-3W KNP-5W KNP-7W KNP-8W KNP-10W 1/2W 1W 2W 3W 5W 7W 8W 10W Resistance range 0.1 - 240R 0.1 - 470R 0.1 - 820R 0.1 - 820R 0.1 - 1.3K 0.1 - 3.3K 0.1 - 2K 0.1 - 4.7K Note: Resistance up to 27 maximum for Non-Inductive type Lower or higher resistance values other than the list are also available in. mm TYPE .002 .020 .024 .031 .059 .138 .157 .217 .256 .335 .354 .433 .590 .709 .984 1.063 1.575 1.693 0.05 0.5 0.6 0.8 1.5 3.5 4.0 5.5 6.5 8.5 9.0 11.0 15.0 18.0 25.0 27.0 40.0 43.0 KNP-1/2W KNP-1W KNP-2W KNP-3W KNP-5W KNP-7W KNP-8W KNP-10W D ±0.5mm 3.5 4.0 5.5 5.5 6.5 8.5 8.5 8.5 DIMENSIONS (mm) L ±1.5mm H(MIN) 9 25 11 27 15 27 15 27 18 27 25 27 40 27 53 27 d ±0.05 0.60 0.8 0.8 0.8 0.8 0.8 0.8 0.8 TEMPERATURE COEFFICIENT -30°C to 200°C ± 300PPM/°C Resistance Tolerance ± 5 How to Order Sample Part Number KNP 1W T300 1RO ± 5% Resistance Tolerance Resistance Value Temperature Coefficient Wattage Type DEDICATION TO EXCELLENCE Subject to change without notice Rev O 4/4/01 DERATING CURVE TEMPERATURE RISE AT 25°C -30°C 70°C 100 250 10W 7W 80 200 5W 60 150 3W 2W 40 100 50 Ambient Temp (°C) 0 0 20 40 1W 1/2W 60 80 Rated Load (%) 20 0 100 120 -20 0 40 120 200 160 240 Temperature Rise (°C) Rated Load (%) Characteristics Condition Resistance Temp. Coeff. Short Time Over Load Rate Load Voltage Durability Insulation Resistance Temp Cycle Load Life Moisture-proof Load Life Incombustibility -30°C ~ +200°C 5 times of rated wattage for 5 sec. Rate watt 30 min. 500V AC 1 min. 500V megger -30°C ~ 85°C 5 cycles 40°C 95% RH on-off cycle 500 hrs. 40°C 95% RH on-off cycle 500 hrs. 6 times of rated wattage for 5 min. PACKAGING: PIECES PER REEL: BULK: Subject to change without notice 80 280 275°C Spec. ± 300 ppm/°C ± 2% ± 1% not changed 500 M ± 1% ± 5% ± 3% not flamed TAPE AND REEL KNP 1/2W AND 1W KNP 2W, 3W AND 5W KNP 7W KNP 8W AND 10W 2500 1000 500 100 REV O 4/4/01