TOKEN KNP-R Power Wirewound Resistors Power Precision Wirewound Resistors Wirewound Resistors Boast Consistent Precision Power Operation Preview Token’s highest quality conformal axial terminal ceramic-silicone coated KNP-R power resistors for applications requiring high stability and precision. The KNP-R wire-wound has a low temperature coefficient and maintain a high degree of stability under demanding conditions. The power precision KNP-R series meeting MIL-R-26E (U and V characteristics) and surface temperature (hot spot) 375°C max. Resistors with a wide range of 0.01Ω ~ 82kΩ, covering applications from precision to power. Products with lead-free terminations meet EU RoHS and China RoHS requirements. Characteristics U : 275°C Maximum hot spot temperature. 1% Maximum ΔR in 1000 hours load life. Characteristics V : 375°C Maximum hot spot temperature. 3% Maximum ΔR in 1000 hours load life. Operating temperature range is -55°C ~ +375°C and derated power at high ambient temperatures as according to the chart below. Token is equipped to design and produce custom components to meet many design and reliability demands. In addition to standard military-grade resistor products, we also have many resistive products designed to meet various source-controlled drawings. Contact us with your specific needs. Features - Excellent load life stability - High Precision and reliability - Axial ceramic-silicone coated - Meets the Standards of MIL-R-26E - RoHS compliant with 100% lead free Applications - Radar, Ground Vehicles - Communications systems - Bias supply, Current shunts, Voltage dropping - Motor speed controls, Voltage divider networks - Medical instrumentation and Medical implantables Version 2010 http://www.token.com.tw/ rfq token.com.tw 01 of 03 TOKEN KNP-R Power Wirewound Resistors Technical Specifcations Power Derating Curve Rated Power (%) 100 d 80 60 U 40 V 38±3 20 0 -55 Type KNP-R1/4 KNP-R1/2 KNP-R1A KNP-R1 KNP-R2A KNP-R2 KNP-R3A KNP-R3 KNP-R4 KNP-R5 KNP-R7 KNP-R10 25 75 125 175 225 275 325 L D 38±3 375 MIL Power Rating Max. Working Resistance Range (Ω) Dimensions (mm) (W) Voltage (V) R-26E U V U V 0.1% 0.25% 0.5% 1% 2% 3% 5% L±0.81 D±0.81 d±0.1 0.40 20 10~950 1~3.4K 6.35 1.98 0.51 RW70 0.75 29 10~1.3K 1~4.9K 7.92 1.98 0.51 1.00 53 1~2.7K 0.1~10.4K 10.31 2.36 0.64 RW69 1.10 62 1~4.0K 0.1~15K 13.49 2.36 0.64 2.50 3.25 138 157 1~8.6K 0.01~32.3K 12.70 5.33 0.81 RW79 3.00 3.75 135 148 1~5K 0.01~2K 13.49 4.06 0.81 3.00 3.75 135 148 1~6.5K 0.01~34.5K 14.27 5.33 0.81 3.25 4.75 185 220 1~11.4K 0.01~42.1K 20.62 5.33 1.02 RW67 4.00 5.50 210 250 1~12.7K 0.01~47.1K 15.88 7.62 1.02 RW74 5.00 6.50 330 376 0.5~24.5K 0.01~51K 22.22 7.62 1.02 RW68 7.00 9.00 504 576 0.5~41.4K 0.01~75K 30.94 9.52 1.02 RW78 10.00 799 911 0.5~71.3K 0.01~82K 45.21 9.52 1.02 Temperature Coefficient: 1 Ω and below ± 150 ppm/°C, 1 Ω to 9.9 Ω ± 100 ppm/°C, 10 Ω and above ± 100 ppm/°C, (50 ppm/°C on request) Electrical Performance Test Items Short Time Overload Rated Load Voltage Withstanding Insulation Resistance Temp. Cycle Soldering After Resistance Incombustibility Load Life 02 of 03 Test Method 2.5 times of rated voltage 5 sec. Rated wattage 30 minutes. 500VAC 1 minute. 500V -20°C ~ 85°C 5 cycles 235°C for 3 sec 16 times of rated wattage for 5 min. +25°C, 1.5Hrs on ~ 0.5Hrs off cycle, 1000 Hrs. http://www.token.com.tw/ Specifications ΔR±(2%+0.05Ω) ΔR±(1%+0.05Ω) ΔR±(1%+0.05Ω) 20MΩ ΔR±(1%+0.05Ω) ΔR±(0.5%+0.05Ω) Not flamed U: ΔR±(1%+0.05Ω) V: ΔR±(3%+0.05Ω) rfq token.com.tw Version 2010 TOKEN KNP-R Power Wirewound Resistors Application Notes Wire-wound Resistors Application Notes: ● When being used in AC circuits, some wirewound structures give inductance ingredients or parasitic capacity, so they may cause unusual phenomena such as oscillations etc. Quorum deviations of other components should be carefully taken into account for use. ● Application and Placement: Wire wound resistors use different gauges of wire as resistance elements. Sometimes the gauge is extremely thin (finer than a strand of human hair) and very susceptible to breakage in environments containing salts, ash, dust and corrosives. Avoid utilization in such environments. ● Do not install in dusty areas because the accumulation will cause shorts and poor conductance. How to Order KNP-R3A U 100R B P Part Number: KNP-R Resistance Tolerance (%) Characteristic (°C) Code Resistance Value (Ω) U V 275°C 375°C Code B C D F G H J Resistance Value (Ω) Code 0R1 1R 100R 1K Resistance Value 1.0Ω 1Ω 100Ω 1000Ω Resistance Tolerance ±0.1% ±0.25% ±0.5% ±1% ±2% ±3% ±5% Package Code TB P Package Taping Box Bulk Back to 1st Page - Power Precision Wirewound Resistors (KNP-R) Version 2010 http://www.token.com.tw/ rfq token.com.tw 03 of 03