{"id":9634,"date":"2026-07-04T13:55:53","date_gmt":"2026-07-04T13:55:53","guid":{"rendered":"https:\/\/materialparts.com\/300110wr003\/"},"modified":"2026-07-04T13:55:53","modified_gmt":"2026-07-04T13:55:53","slug":"300110wr003","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/300110wr003\/","title":{"rendered":"300110WR003"},"content":{"rendered":"

\u0646\u0638\u0631\u0629 \u0639\u0627\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0645\u0646\u062a\u062c<\/h2>\n

The 300110WR003 is a precision wirewound resistor from the Vishay MR300 series, designed for ultra-precision and high-stability applications. This axial lead resistor features epoxy molding for environmental protection, with temperature coefficients down to \u00b12ppm\/\u00b0C and long-term stability of \u00b120ppm\/year. The device offers resistance values up to 6M\u03a9 with tolerances down to \u00b10.005%, making it ideal for precision measurement and instrumentation applications.<\/p>\n

\u0627\u0644\u0645\u0648\u0627\u0635\u0641\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
Resistor Type<\/td>\nUltra Precision Wirewound<\/td>\n<\/tr>\n
Temperature Coefficient<\/td>\n\u00b12 ppm\/\u00b0C to \u00b130 ppm\/\u00b0C<\/td>\n<\/tr>\n
Long-term Stability<\/td>\n\u00b120 ppm\/year<\/td>\n<\/tr>\n
Tolerance<\/td>\nDown to \u00b10.005%<\/td>\n<\/tr>\n
Resistance Range<\/td>\n1\u03a9 to 6M\u03a9 (varies by model)<\/td>\n<\/tr>\n
Encapsulant<\/td>\nEpoxy molded<\/td>\n<\/tr>\n
Terminals<\/td>\n100% matte tinned copper (axial)<\/td>\n<\/tr>\n
Dielectric Withstanding<\/td>\n750 VAC<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55\u00b0C to +145\u00b0C<\/td>\n<\/tr>\n
Element<\/td>\nNickel-chrome alloy<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • Ultra-precision resistance with tolerances down to \u00b10.005%<\/li>\n
  • Exceptional stability of \u00b120ppm per year<\/li>\n
  • Temperature coefficients as low as \u00b12ppm\/\u00b0C<\/li>\n
  • Matched resistance sets available for precision divider applications<\/li>\n
  • Epoxy molded construction for moisture and mechanical protection<\/li>\n
  • Halogen-free and green device compliant<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Precision instrumentation and measurement equipment<\/li>\n
    • Medical device calibration circuits<\/li>\n
    • Test and measurement bridges<\/li>\n
    • Reference voltage dividers<\/li>\n
    • Aerospace and defense electronics<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 300110WR003 is a precision wirewound resistor from the Vishay MR300 series, designed for ultra-precision and high-stability applications. This axial lead resistor features epoxy molding for environmental protection, with temperature coefficients down to \u00b12ppm\/\u00b0C and long-term stability of \u00b120ppm\/year. The device offers resistance values up to 6M\u03a9 with tolerances down to \u00b10.005%, making […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[897],"chip_brand":[136],"class_list":["post-9634","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","tag-300110wr003","chip_brand-vishay"],"acf":{"brief_explanation":"Ultra-precision wirewound resistor, \u00b12ppm\/\u00b0C TCR, \u00b120ppm\/year stability, epoxy molded axial","date_code":"","package_case":"Axial Lead (varies by model)","in_stock":2340,"datasheet":"https:\/\/www.vishay.com\/docs\/31815\/mr300.pdf","price":"$8.50 @ 1ku","product_introduction":"The Vishay 300110WR003 is an ultra-precision wirewound resistor from the MR300 series, designed for applications requiring the highest levels of accuracy and long-term stability. The resistor features a nickel-chrome alloy element wound on a molded epoxy core, encapsulated in flame-retardant epoxy for superior environmental protection. With temperature coefficients as low as \u00b12ppm\/\u00b0C and long-term stability of \u00b120ppm\/year, this resistor is suitable for the most demanding precision applications. Resistance tolerances are available down to \u00b10.005%, enabling use in calibration and reference circuits. The 100% matte tinned copper terminals ensure reliable solderability, and the device meets RoHS requirements. Matched resistance sets are available for precision voltage divider and bridge applications.","working_principle":"The MR300 series wirewound resistor operates on the principle of electrical resistance in a fine nickel-chrome alloy wire. The resistance value is precisely determined by the wire material's resistivity, length, and cross-sectional area. The wire is wound on an insulating core in a bifilar pattern to minimize inductance. The epoxy encapsulation provides mechanical protection, moisture resistance, and thermal insulation to ensure long-term stability. The low temperature coefficient is achieved by selecting specific nickel-chrome alloys whose resistance changes minimally with temperature. The precision tolerance is achieved through careful winding control and laser trimming. The \u00b120ppm\/year stability results from stress-relief annealing and the hermetic-like protection of the epoxy molding, which prevents oxidation and contamination of the resistance element.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Terminal 1<\/td>Connection<\/td>Axial lead connection, tinned copper<\/td><\/tr>
      2<\/td>Terminal 2<\/td>Connection<\/td>Axial lead connection, tinned copper<\/td><\/tr><\/table>","application_scenarios":"
      • Precision instrumentation and measurement bridge circuits<\/li>
      • Medical device calibration and reference networks<\/li>
      • Aerospace and defense precision electronics<\/li>
      • High-accuracy voltage dividers and reference circuits<\/li>
      • Test equipment and standards laboratory instruments<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Vishay<\/td>Z201 Series<\/td>Axial<\/td>Bulk metal foil, even better TCR<\/td><\/tr>
        Vishay<\/td>VHP100<\/td>Axial<\/td>Hermetic seal wirewound<\/td><\/tr>
        TE Connectivity<\/td>HS5 Series<\/td>Axial<\/td>Precision wirewound resistor<\/td><\/tr>
        Riedon<\/td>VSMP Series<\/td>Axial<\/td>Precision wirewound, low TCR<\/td><\/tr>
        Precision Resistor<\/td>1000 Series<\/td>Axial<\/td>Ultra-precision wirewound<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=9634"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/9634\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=9634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=9634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=9634"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=9634"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}