MH2510MOG资料

High Voltage

Metal Film ResistorsMH SeriesWelwyn Components•BSEN 60065 Approval for MH37 in value range 680K to 3MHigh working voltage to 3.5KVSmall sizeHigh pulse load capabilityRobust cement coatingValue up to 10M•••••Electrical DataMH25Power rating at 70°C maxResistance rangeLimiting element voltageIsolation voltageTCRResistance toleranceStandard valuesThermal impedanceAmbient temperature range°C/watt°C140- 55 to 155wattsohmsvolts dc or ac peakvoltsppm/°C%0.25100K - 10M1,6007001001, 2, 5E24 and E96 preferred112MH370.5100K - 3M3,500Physical DataDimensions (mm) and Weight (g)PCBmountingcentres10.212.7MinBendRadius0.61.2TypeMH25MH37L max6.29.0D max2.53.7f min21.019.6d nom0.60.8Wt.nom0.30.5dDLfConstructionThin film material is sputtered on to high grade ceramic rods.Nickel plated steel caps are force fitted and the terminationwires are welded to the caps. The value is obtained by ahelical cut in the film and finally the resistor body is protectedby a cement protection applied so that the terminationsremain completely clear.TerminationsMaterialStrengthSolder-coated copper wire.The terminations satisfy the requirements ofIEC 68.2.21.SolderabilityThe terminations meet the requirements ofIEC 115-1, Clause 4.17.3.2Marking1% tolerance resistors are colour coded with 5 bands.2% and 5% tolerance have 4. Band IEC 62 colours are used.Solvent resistanceThe body protection and marking are resistant to all normalindustrial cleaning fluids suitable for printed boards.General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn’s own data and is considered accurate at time of going to print.

A subsidiary of TTelectronics plcIssue E · 10.05

© Welwyn Components Limited· Bedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

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High Voltage

Metal Film Resistors

MH Series

Welwyn Components

Performance DataMaximumLoad at rated voltage : 1000 hrs at 70°CDerating from rated power at 70°COverload56 days at DHSSClimaticClimatic categoryTemperature rapid changeResistance to solder heatVibration and bumpVoltage proof∆R%∆R%∆R%volts0.50.50.5700 min∆R%∆R%∆R%1.01.51.555/155/560.050.050.05∆R%1.5Zero at 155°C0.250.20.2Typical0.4Application NotesTo ensure reliable performance at high voltages care shouldbe taken to avoid potential sources of ionic contaminationcontacting the resistor body, for example, flux applied byspraying, encapsulation materials or contaminants from theenvironment of use.PackagingAll MHseries resistors are supplied tape packed ready forloading on automatic sequencing and insertion machines.Component wires will not protrude beyond the outside edgeof the tape.Alternative packing available by request.Standard Quantities Per PackageTypeAmmo packMH255000MH37250065265Lead Formed Resistors can also be supplied. Standard optionsof Lancet, Radial and Goal Post forming are shown in theLead Form information sheet.f1f2Body Location f1 – f2 ≤ 1.4 mm Ordering ProcedureSpecify type reference, value and tolerance as shown in this example of MH25 10MR 1%:TypeResistance value(IEC62 code)Tolerance(IEC62 code)FGJ1%2%5%MH2510MOF© Welwyn Components LimitedBedlington, Northumberland NE22 7AA, UK

Telephone: +44 (0)1670 822181 · Facsimile: +44 (0)1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

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Issue E · 10.05