{"id":3769,"date":"2026-06-08T03:23:16","date_gmt":"2026-06-08T03:23:16","guid":{"rendered":"https:\/\/materialparts.com\/mbr0540\/"},"modified":"2026-06-08T03:23:16","modified_gmt":"2026-06-08T03:23:16","slug":"mbr0540","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/mbr0540\/","title":{"rendered":"MBR0540"},"content":{"rendered":"

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

The MBR0540 from onsemi is a 40V 500mA surface-mount Schottky barrier rectifier in a SOD-123 package, featuring low 0.45V forward voltage drop for low-power rectification and reverse polarity protection.<\/p>\n

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\u0627\u0644\u0646\u0648\u0639<\/td>\nSchottky Barrier Rectifier<\/td>\n<\/tr>\n
Reverse Voltage (VRRM)<\/td>\n40V<\/td>\n<\/tr>\n
Forward Current (IF)<\/td>\n0.5A (500mA)<\/td>\n<\/tr>\n
Forward Voltage (VF)<\/td>\n0.45V (typ @ 500mA)<\/td>\n<\/tr>\n
Reverse Current (IR)<\/td>\n0.5 mA (max @ 40V, 25C)<\/td>\n<\/tr>\n
Surge Current (IFSM)<\/td>\n5.5A (8.3ms)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOD-123 (2.7 x 1.6mm)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-65 to +150 C (TJ)<\/td>\n<\/tr>\n<\/table>\n

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    \n
  • Ultra-small SOD-123 package for compact designs<\/li>\n
  • Low 0.45V forward voltage drop<\/li>\n
  • 500mA current rating<\/li>\n
  • 40V reverse voltage<\/li>\n
  • Zero reverse recovery time<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Low-power DC-DC converter rectification<\/li>\n
    • Signal isolation and OR-ing<\/li>\n
    • Reverse polarity protection in battery devices<\/li>\n
    • Solar cell blocking diode<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MBR0540 from onsemi is a 40V 500mA surface-mount Schottky barrier rectifier in a SOD-123 package, featuring low 0.45V forward voltage drop for low-power rectification and reverse polarity protection. Key Specifications Type Schottky Barrier Rectifier Reverse Voltage (VRRM) 40V Forward Current (IF) 0.5A (500mA) Forward Voltage (VF) 0.45V (typ @ 500mA) Reverse Current […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[57,13],"tags":[],"chip_brand":[144],"class_list":["post-3769","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"40V\/0.5A Schottky diode, 0.45V VF, SOD-123, low power rectification","date_code":"","package_case":"SOD-123 (2.7 x 1.6 x 1.1 mm)","in_stock":9400,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/MBR0520L-D.PDF","price":"$0.04 @ 10ku","product_introduction":"The MBR0540 from onsemi is a 40V 500mA Schottky barrier rectifier in an ultra-compact SOD-123 surface-mount package. As a member of the MBR05xx Schottky diode family, the 40 suffix denotes a 40V reverse voltage rating. The Schottky barrier junction provides a low forward voltage drop of 0.45V typical at 500mA, reducing conduction losses compared to standard P-N silicon diodes. The 500mA current rating makes this device suitable for low-power rectification, reverse polarity protection, and signal OR-ing in battery-powered and portable electronics. The zero reverse recovery time characteristic of Schottky diodes makes the MBR0540 suitable for high-frequency switching applications up to several MHz without the reverse recovery losses associated with P-N diodes. The tiny SOD-123 package (2.7 x 1.6mm) occupies minimal board space, making it ideal for compact portable device designs where multiple rectifier diodes are needed. The MBR0540 is commonly used in small DC-DC converters, battery-powered instrument protection, and general-purpose low-power rectification where efficiency and size are primary concerns.","working_principle":"The MBR0540 operates as a Schottky barrier rectifier using a metal-semiconductor junction. The low barrier height of the Schottky junction results in a forward voltage drop of approximately 0.45V at rated current, compared to 0.6-0.7V for a comparable P-N silicon diode. As a majority-carrier device, the MBR0540 has essentially zero reverse recovery time, eliminating the reverse recovery charge (QRR) and associated switching losses that limit P-N diode performance at high frequencies. The tradeoff for low VF is higher reverse leakage current, which increases with temperature but is acceptable in most low-voltage applications.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>Anode<\/td>Positive terminal<\/td><\/tr>
      2<\/td>Cathode<\/td>Negative terminal (marked with band)<\/td><\/tr><\/table>","application_scenarios":"
      • Low-power buck converter: free-wheeling diode in 5V-to-1.8V converter at 300mA<\/li>
      • Battery reverse protection: series diode on 3.7V Li-Ion input with only 0.45V drop<\/li>
      • Signal OR-ing: two signal sources diode-ORed to one output for redundancy<\/li>
      • Solar cell blocking: prevents small solar panel discharge at night in IoT sensor<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        onsemi<\/td>MBR0520L<\/td>SOD-123<\/td>20V version<\/td><\/tr>
        onsemi<\/td>MBR0530<\/td>SOD-123<\/td>30V version<\/td><\/tr>
        Nexperia<\/td>PMEG4010AEA<\/td>SOD-128<\/td>40V\/1A, slightly larger<\/td><\/tr>
        Vishay<\/td>SD103AWS<\/td>SOD-323<\/td>40V\/0.2A, smaller package<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3769","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=3769"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3769\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3769"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3769"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3769"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3769"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}