{"id":8380,"date":"2026-06-28T13:39:28","date_gmt":"2026-06-28T13:39:28","guid":{"rendered":"https:\/\/ic-vendor.com\/mmsz5228b-7-f\/"},"modified":"2026-06-28T13:39:28","modified_gmt":"2026-06-28T13:39:28","slug":"mmsz5228b-7-f","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/ar\/mmsz5228b-7-f\/","title":{"rendered":"MMSZ5228B-7-F"},"content":{"rendered":"

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

The MMSZ5228B-7-F from Diodes Incorporated is a 3.3 V Zener diode in a SOD-123 package. Part of the MMSZ52xxB series, it provides 3.3 V nominal regulation with 5% tolerance and 500 mW power dissipation, suitable for voltage regulation and reference applications in space-constrained circuits.<\/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
Zener Voltage (VZ)<\/td>\n3.3 V (nominal), 3.14-3.47 V (range)<\/td>\n<\/tr>\n
Tolerance<\/td>\n5% (B suffix)<\/td>\n<\/tr>\n
\u062a\u0628\u062f\u064a\u062f \u0627\u0644\u0637\u0627\u0642\u0629<\/td>\n500 mW<\/td>\n<\/tr>\n
ZZT (impedance)<\/td>\n28 \u03a9 @ IZT = 20 mA<\/td>\n<\/tr>\n
Leakage Current<\/td>\n5 \u00b5A @ VR = 1 V<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOD-123<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 3.3 V nominal Zener voltage with 5% tolerance<\/li>\n
  • 500 mW power dissipation in compact SOD-123<\/li>\n
  • Low Zener impedance of 28 \u03a9 at 20 mA<\/li>\n
  • Pb-Free and RoHS compliant<\/li>\n
  • Wide operating temperature range<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • Voltage regulation and clamping<\/li>\n
    • Voltage reference for comparators<\/li>\n
    • ESD protection for 3.3 V logic<\/li>\n
    • Overvoltage protection<\/li>\n
    • Signal level shifting and clamping<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MMSZ5228B-7-F from Diodes Incorporated is a 3.3 V Zener diode in a SOD-123 package. Part of the MMSZ52xxB series, it provides 3.3 V nominal regulation with 5% tolerance and 500 mW power dissipation, suitable for voltage regulation and reference applications in space-constrained circuits. Key Specifications Zener Voltage (VZ) 3.3 V (nominal), 3.14-3.47 […]<\/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":[57,13],"tags":[],"chip_brand":[193],"class_list":["post-8380","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-diodes-inc"],"acf":{"brief_explanation":"3.3V Zener diode, 5%, 500mW, SOD-123, voltage regulation\/reference","date_code":"","package_case":"SOD-123 (2.65 x 1.60 x 0.90 mm)","in_stock":11785,"datasheet":"https:\/\/www.diodes.com\/assets\/Datasheets\/ds18007.pdf","price":"$0.02 @ 1ku","product_introduction":"The MMSZ5228B-7-F from Diodes Incorporated is a 3.3 V nominal Zener diode in a compact SOD-123 surface-mount package. The B suffix indicates 5% voltage tolerance with a Zener voltage range of 3.14 V to 3.47 V at IZT = 20 mA. The device provides 500 mW maximum power dissipation with a low dynamic impedance of 28 \u03a9 at the test current, making it suitable for basic voltage regulation and reference applications in 3.3 V logic systems. The SOD-123 package offers a smaller footprint than the traditional SOD-80\/MiniMELF while maintaining adequate thermal performance for the 500 mW rating. Pb-Free and RoHS compliant. The -7-F suffix indicates 7-inch tape and reel packaging for automated assembly.","working_principle":"The MMSZ5228B operates in the reverse breakdown region where the Zener diode maintains a relatively constant voltage across its terminals despite variations in current. When reverse-biased above the Zener voltage (3.3 V nominal), the diode enters avalanche breakdown, conducting current in the reverse direction while maintaining the Zener voltage at its terminals. The dynamic impedance (ZZT = 28 \u03a9) represents the small-signal slope of the V-I characteristic at the test current (20 mA), determining how much the Zener voltage changes with load current variations. In a typical shunt regulator application, a series resistor limits the total current, and the Zener diode shunts excess current to maintain the output voltage at approximately 3.3 V.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>Cathode<\/td>Positive terminal during Zener operation; marked with band<\/td><\/tr>
      2<\/td>Anode<\/td>Negative terminal during Zener operation; connects to ground<\/td><\/tr><\/table>","application_scenarios":"
      • 3.3 V Rail Clamping<\/strong>: Shunt regulation and overvoltage clamping for 3.3 V logic power rails<\/li>
      • Voltage Reference<\/strong>: Low-precision voltage reference for comparator and op-amp bias circuits<\/li>
      • ESD Protection<\/strong>: Input protection for 3.3 V MCU and FPGA I\/O pins against transient overvoltage<\/li>
      • Signal Clamping<\/strong>: Limiting signal voltage swings to the 3.3 V domain in mixed-voltage systems<\/li>
      • Power Supply Sequencing<\/strong>: Voltage threshold detection using the Zener as a reference with a transistor amplifier<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>VZ<\/th>Tol<\/th>Pd<\/th>Package<\/th>Notes<\/th><\/tr>
        MMSZ5228BT1G<\/td>onsemi<\/td>3.3 V<\/td>5%<\/td>500 mW<\/td>SOD-123<\/td>Direct equivalent<\/td><\/tr>
        BZX55C3V3<\/td>Nexperia<\/td>3.3 V<\/td>5%<\/td>500 mW<\/td>DO-35<\/td>Through-hole equivalent<\/td><\/tr>
        MM3Z3V3ST1G<\/td>onsemi<\/td>3.3 V<\/td>5%<\/td>200 mW<\/td>SOD-523<\/td>Smaller package, lower Pd<\/td><\/tr>
        BZT52C3V3-7-F<\/td>Diodes Inc<\/td>3.3 V<\/td>5%<\/td>500 mW<\/td>SOD-123<\/td>Same manufacturer, different series<\/td><\/tr>
        1N5228B-TR<\/td>Microsemi<\/td>3.3 V<\/td>5%<\/td>500 mW<\/td>DO-35<\/td>Through-hole, military grade<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/8380","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/comments?post=8380"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/8380\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=8380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=8380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=8380"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=8380"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}