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WD

WD
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WD

Product catalog summary
Overview: This document provides technical specifications for wirewound resistors housed in aluminum by KRAH ELEKTRONISCHE BAUELEMENTE GMBH. It includes details on various models, their power ratings, resistance ranges, tolerances, and physical dimensions.
Specifications:
  • Models: WD 5, 10, 25, 50, 75, 100, 150, 200, 250, 300
  • Rated Power (W): Ranges from 10W to 300W depending on the model.
  • Max Power without Heatsink (W): Ranges from 5W to 75W.
  • Resistance Range (Ω): Varies from 0.01Ω to 100KΩ depending on the model.
  • Resistance Tolerances (%): Values less than 1Ω have a tolerance of ±5%. Values greater than 1Ω have tolerances ranging from ±5% to ±0.25%.
  • Temperature Coefficient (ppm/°C): 60 ppm/°C for values < 100Ω, 30 ppm/°C for values > 100Ω.
  • Voltage Limit (V/DC or ACrms): Ranges from 160V to 2,500V.
  • Dielectric Strength (V/AC): Up to 5,000V.
Dimensions:
  • Dimensions vary by model, with lengths ranging from 16.8mm to 127mm and other dimensions specified for each model.
Heat Sink:
  • Area ranges from 400 cm² to 5,800 cm², with thicknesses of 1mm or 3mm depending on the model.
Ordering Example: WD 25 47R J
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Catalog excerpts

WD-1

Wirewound resistors aluminium housed WD 5, 10, 25, 50 Nennleistung (W) Rated power (W) Max. Leistung ohne Kühlk. (W) Max. power, no heatsink (W) Widerstandswerte (Ω) Resistance range (Ω) R01R01R01R01R01R01R01R01R0115K 35K 100K 50K 100K 100K 50K 65K 80K Werte / Values < 1R0 J (± 5%) Werte / Values > 1R0 J (± 5%), G (± 2%), F (± 1%), D (± 0,5%), C (± 0,25%) Werte / Values < 100R 60 Werte / Values > 100R 30 Widerstandstoleranzen (%) Resistance tolerances (%) Temperaturkoeff. (ppm/°C) Temperature coeff. (ppm/°C) Grenzspg (V/DC or ACrms) Voltage limit (V/DC or ACrms) Fläche(cm²) Kühkkörper Heat sink Order designation: KRAH ELEKTRONISCHE BAUELEMENTE GMBH, Märkische Straße 4, D-57489 Drolshagen, Telefon: +49 (0)2761/701-0, Telefax: +49 (0)2761/701-177 Seite 1 Lfd.-Nr.:

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.