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FW70A Datasheet(PDF) 2 Page - Bourns Electronic Solutions |
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FW70A Datasheet(HTML) 2 Page - Bourns Electronic Solutions |
2 / 4 page Specificationsaresubjecttochangewithoutnotice. Thedevicecharacteristicsandparametersinthisdatasheetcananddovaryindifferentapplicationsandactualdeviceperformancemayvaryovertime. Usersshouldverifyactualdeviceperformanceintheirspecificapplications. FWxxASeriesFusiblePowerResistors Performance Specifications Characteristic Limits Test Method (JIS-C-5201 & JIS-C-5202) TemperatureCoefficient ±200PPM/°Cmax. 4.8Naturalresistancechangespertemperature(°C): R2-R2 x106(PPM/°C) R1(T2-T1) R1:Resistancevalueatroomtemp.(T1) R2:Resistancevalueatroomtemp.+100°C(T2) Short Time Overload Resistancechangerateis±5%max.,with no evidence of mechanical damage. 4.13 Permanent resistance change after the application of a potentialof2.5timesRCWVfor5seconds. Terminal Strength No evidence of mechanical damage. 4.16 DirectLoad: Resistance to a 2.5 kg direct load for 10 seconds in the directionofthelongitudinalaxisoftheterminalleads. TwistTest: Terminalleadsshallbebentthrough90°atapointof approximately6mmfromthebodyoftheresistorand shallberotatedthrough360°(abouttheoriginalaxisof thebentterminal)inalternatingdirectionsforatotalof three rotations. Resistance to Soldering Heat Resistancechangerateis±1%max.,with no evidence of mechanical damage. 4.18 Permanent resistance change when leads are immersed toapoint2.0to2.5mmfromthebodyin260°C(±5°C) solderfor10(±1)seconds. Solderability 95%coverageminimum 4.17 The area covered with a new, smooth, clean, shiny and continuous surface free from concentrated pinholes. Testtemp.ofsolder:245°C(±3°C). Dwelltimeinsolder:2~3seconds. Load Life in Humidity Resistancechangerateis±5%max.,with no evidence of mechanical damage. 7.9 Resistance change after 1,000 hours (1.5 hours “ON”, 0.5hours“OFF”)atRCWVinahumiditytestchamber controlledat40°C(±2°C)and90-95%relativehumidity. Safety Fuse Resistance value shall increase at least 100 times initial value. 1W~5W:Load120/240VACvoltage. 7W:Load240VACvoltage. Resistormustbesafelyfused. Dielectric Withstanding Voltage Noevidenceofflashovermechanical damage,arcingorinsulationbreakdown. UL1412, 19.1Aresistor(oraresistoranditsmountingifprovided), shallwithstand,withoutbreakdown,foraperiodofnot lessthanoneminute,a60Hzpotentialof1000Vplus twicetheratedvoltageappliedbetweenlivepartsand dead metal parts, if any. 1st Significant Figure 2nd Significant Figure 3rd Significant Figure Multiplier Tolerance Typical Part Marking Color 1st Band 2nd Band 3rd band Multiplier Tolerance Black 0 0 0 1Ω Brown 1 1 1 10Ω ±1% Red 2 2 2 100Ω ±2% Orange 3 3 3 1KΩ Yellow 4 4 4 10KΩ Green 5 5 5 100KΩ ±0.5% Blue 6 6 6 1MΩ ±0.25% Violet 7 7 7 10MΩ ±0.10% Grey 8 8 8 ±0.05% White 9 9 9 Gold 0.1Ω ±5% Silver 0.01Ω ±10% |
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