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| UT Series SiliconeCoatedPowerResistors * * * * * * * Resistances from 0.005 to 260kOhms Power Rating 0.1 to 13Watts Resistance Tolerances to 0.01% Low TCR: 20ppm/K Standard MIL-R-26 / MIL-R-39007 Power Ratings Temperature Range: -55C to +350C ( "V" Rating ) Non-Inductive Windings Available SPECIFICATIONS Specification Tolerances Temperature Coefficient Value 0.01%to10%(1%Standard) >10W:20ppm/K 1Wto10W:50ppm/K <1W:CallFactory -55Cto+250C:CharacteristicU -55Cto+350C:CharacteristicV 500VAC:UT-1/UT-1/2A/UT-1/2/UT-1A 1000VAC:AllOthers Centerlessgroundceramiccore Tinnedcopperorcopperweldleads Hightemperature/trivalent/inorganicSiliconecoating Allweldedterminations TemperatureRange DielectricStrength Constuction EnvironmentalPerformance (MIL-STD202) DR CharacteristicU 0.2%+0.05W 1%+0.05W 0.2%+0.05W 0.2%+0.05W 0.2%+0.05W 0.2%+0.05W 0.1%+0.05W 0.1%+0.05W 120 100 CharacteristicV 0.2%+0.05W 3%+0.05W 2%+0.05W 2%+0.05W 2%+0.05W 2%+0.05W 0.2%+0.05W 0.2%+0.05W Dielectric LoadLife Storage MoistureResistance ThermalShock 5XOverload(5s) Shock Vibration PowerDeratingCurve Power(%) 80 60 40 20 0 CH CH AR V AR U 0 50 100 150 200 250 300 350 400 Ordering Information ForNon-InductiveWindings/inserttheletter"N"(i.e.UTN-5) PartNumber-Resistance-Tolerance-TCR(Ifnotstandard) Example:UT-525kOhms0.1% AmbientTemperature(C) Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom. http://www.willow.co.uk + 44 (0) 1342 835234 + 44 (0) 1342 834306 info@willow.co.uk rev.03/2006A UT Series SiliconeCoatedPowerResistors SPECIFICATIONS (continued) Type WattageRating (Watts) U V 0.25 0.5 0.9 1.5 2.0 3.0 3.75 4.0 3.5 5.5 6.5 6.5 6.5 9.0 9.0 9.0 13 Dimensions Maximum Ohms2 0.062" [1.6mm] A 0.031" [0.8mm] B 0.002" [0.05mm] 0.018[0.46] 0.020 [0.5] 0.025[0.6] 0.020 [0.5] 0.025[0.6] 0.020 [0.5] 0.025[0.6] 0.032 [0.8] 0.025[0.6] 0.032[0.8] 0.032[0.8] 0.040 [1.0] 0.032[0.8] 0.032[0.8] 0.032 [0.8] 0.040[1.0] 0.040[1.0] 0.032[0.8] 0.040[1.0] 0.040[1.0] 0.040[1.0] 0.040[1.0] 0.040[1.0] C 1 Maximum Working Voltage MIL-R-26/ MIL-R-39007 Style UT-1 UT-1/2A UT-1/23 UT-1A UT-2 UT-2A UT-2B UT-2C UT-2E UT-3 UT-5 UT-5A UT-6 UT-7A3 UT-7B UT-7C UT-10 0.1 0.4 0.75 1.0 1.5 2.5 3.0 3.0 3.0 4.0 5.0 5.0 5.0 7.0 7.0 7.0 10 500 2.5k 7.5k 10k 12.5k 22k 22k 40k 30k 45k 91k 65k 95k 150k 100k 154k 260k 0.150[3.8] 0.250[6.4] 0.330[8.4] 0.406[10.3] 0.350[8.9] 0.500[12.7] 0.560[14.2] 0.500[12.7] 0.500[12.7] 0.625[15.9] 0.875[22.2] 0.970[24.6] 1.000[25.4] 1.375[35.0] 1.400[35.6] 1.220[31.0] 1.780[45.2] 0.078[2.0] 0.078[2.0] 0.078[2.0] 0.094[2.4] 0.156[4.0] 0.187[4.7] 0.187[4.7] 0.250[6.4] 0.200[5.1] 0.250[6.4] 0.312[7.9] 0.203[5.2] 0.312[7.9] 0.375[9.5] 0.312[7.9] 0.312[7.9] 0.375[9.5] 8.5 20 29 52 60 130 140 140 140 210 360 390 504 650 590 620 850 RW-78 RWR-78 RW-67 RW-74 RWR-74 RW-69 RW-79 RWR-79 RW-70 LeadDiameter:18AWG=0.040"/20AWG=0.032"/22AWG=0.025"/24AWG=0.020"/25AWG=0.018" Wheremorethanoneleadislisted/thetopvalueisStandard 2 Fornon-inductivewindings/dividemaximumresistanceby2 3 ThispartdoesnotmeettheRoHSdirective-callfactoryfordetails 1 Willow Technologies Ltd. Shawlands Court, Newchapel Road, Lingfield, Surrey, RH7 6BL, United Kingdom. http://www.willow.co.uk + 44 (0) 1342 835234 + 44 (0) 1342 834306 info@willow.co.uk rev.03/2006A |
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