华科常规电阻承认书.pdf

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1、ApprovalsheetWR12,WR08,WR06,WR04±±±1%,±±±5%ThickFilmGeneralPurposeChipResistorsSize1206,0805,0603,0402*Contentsinthissheetaresubjecttochangewithoutpriornotice.Page1of9ASC_WR_V21Mar.-2012ApprovalsheetFEATURE1.Highreliabilityandstability2.Reducedsizeoffinalequipment3.Lowerassemblycosts4.Higherc

2、omponentandequipmentreliability5.RoHScompliantandLeadfreeproductsAPPLICATION·Consumerelectricalequipment·EDP,Computerapplication·TelecomapplicationDESCRIPTIONTheresistorsareconstructedinahighgradeceramicbody(aluminumoxide).Internalmetalelectrodesareaddedateachendandconnectedbyaresistivepastet

3、hatisappliedtothetopsurfaceofthesubstrate.Thecompositionofthepasteisadjustedtogivetheapproximateresistancerequiredandthevalueistrimmedtowithintolerancebylasercuttingofthisresistivelayer.Theresistivelayeriscoveredwithaprotectivecoat.Finally,thetwoexternalendterminationsareadded.Foreaseofsolder

4、ingtheouterlayeroftheseendterminationsisaTin(leadfree)alloy.Fig1.ConstructionofChip-RPage2of9ASC_WR_V21Mar.-2012ApprovalsheetQUICKREFERENCEDATAItemGeneralSpecificationSeriesNo.WR12WR08WR06WR04Sizecode1206(3216)0805(2012)0603(1608)0402(1005)ResistanceRange1W~10MW(±5%tolerance),Jumper1W~10MW(±1

5、%tolerance),ResistanceTolerance±1%±5%±1%±5%±1%±5%±1%±5%E96/E24E24E96/E24E24E96/E24E24E96/E24E24TCR(ppm/°C)10MW³R＞10W£±100R£10W-200~+400Max.dissipation1/4W1/8W1/10W1/16W@Tamb=70°CMax.Operation200V150V50V50VVoltage(DCorRMS)Max.Overload400V300V100V100VVoltage(DCorRMS)Climaticcategory55/155/56Not

6、e:1.Thisisthemaximumvoltagethatmaybecontinuouslysuppliedtotheresistorelement,see“IECpublication60115-8”2.Max.OperationVoltage:SocalledRCWV(RatedContinuousWorkingVoltage)isdeterminedbyRCWV=RatedPower´ResistanceValueorMax.RCWVlistedabove,whicheverislower.3.TheresistanceofJumperisdefined<0.05W.D

7、IMENSIONS(unit:mm)WR12WR08WR06WR04L3.10±0.102.00±0.101.60±0.101.00±0.05W1.60±0.101.25±0.100.80±0.100.50±0.05T0.60±0.150.50±0.150.45±0.150.35±0.05Tb0.45±0.200.40±0.200.30±0.150.25±0.10Tt0.50±0.200.40±0.200.30±0.100.20±0.10Page3of9ASC_WR_V21Mar