Semi-Precision PowerWirewound ResistorsPPW SeriesWelwyn Components•Ideal for pulse and surgeapplications•2 watts to 15 watts•Resistance to 0R1 ohms to 5K ohms•±3%, ±2% or ±1% tolerance•±20 ppm/°C TCR Electrical DataPPW-2Power rating at 25°CResistance rangewatts2PPW-33PPW-55PPW-77PPW-1010PPW-15150R1 to 5Kohms0R1 to 1K60R1 to 1K60R1 to 1K60R1 to 2K50R1 to 5KPlease note: When ordering the alternate configuration please add an ‘A’ after the part number (ie. PPW-3A)Lighting Surge Capabilities for PPW-2Resistive range1R to 9R910R to 29R930R to 99R100R to 1K6ohms10 x 1000*250V500V600V1000V10 x 360*650V850V1000V1500V1000V500V1000200030001000 Volts 10x360µsec*10 microseconds – Maximum rise time to peak voltage.360 or 1000 microseconds - minimum decay time to one half peak.600V300V100020003000600 Volts 10x1000µsecGeneral 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 B · 03.02
© 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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Semi-Precision PowerWirewound Resistors
PPW Series
Welwyn Components
Physical DataDimensions (mm)Standard Configurationd25.4minTypePPW-2PPW-3PPW-5PPW-7PPW-10PPW-15Alternate ConfigurationWHL3.17 max.EL ±0.8170522.322.335.347.747.7W ±0.86.997.879.659.659.6512.7H ±0.86.997.878.898.898.8912.7d dia.0.80.80.80.80.80.8E ±0.88.1349.6510.411.911.912.7Temperature RiseHot Spot Temperature (°C)250200150100500020406080100120PPW-15PPW-10PPW-7PPW-5PPW-3PPW-2Power Derating10080% Rated Load60150402000Max. RecommendedAmbient OperatingTemperature 150°C254065PPW-2PPW-3, 5, 7, 10PPW-15% Rated Load50100150200Ambient Temperature (°C)250© 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 B · 03.02
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