{"id":9542,"date":"2026-07-03T08:47:11","date_gmt":"2026-07-03T08:47:11","guid":{"rendered":"https:\/\/materialparts.com\/smf5-0a\/"},"modified":"2026-07-03T08:47:11","modified_gmt":"2026-07-03T08:47:11","slug":"smf5-0a","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/smf5-0a\/","title":{"rendered":"SMF5.0A"},"content":{"rendered":"

\u4ea7\u54c1\u6982\u89c8<\/h2>\n

The SMF5.0A is a 200 W unidirectional transient voltage suppression (TVS) diode in a SOD-123FL package, designed to protect 5 V circuits from ESD, EFT, and surge transients. As the 5 V variant of the SMF series, it provides the same form factor and protection capability as the SMF12A but optimized for 5 V logic and USB power rails.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
Standoff Voltage (Vrwm)<\/td>\n5.0 V<\/td>\n<\/tr>\n
Breakdown Voltage (Vbr)<\/td>\n6.0 – 7.3 V @ 1mA<\/td>\n<\/tr>\n
Clamping Voltage (Vc)<\/td>\n9.2 V @ Ipp=21.7A (typical)<\/td>\n<\/tr>\n
Peak Pulse Power (Pppm)<\/td>\n200 W (10\/1000 us)<\/td>\n<\/tr>\n
\u6781\u6027<\/td>\nUnidirectional<\/td>\n<\/tr>\n
Leakage Current<\/td>\n800 uA max @ 5V (typical)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOD-123FL<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u81f3+150\u6444\u6c0f\u5ea6<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 5.0 V standoff for 5V logic and USB protection<\/li>\n
  • 200 W peak pulse power handling<\/li>\n
  • Low clamping voltage for effective 5V rail protection<\/li>\n
  • Same SOD-123FL package as SMF12A<\/li>\n
  • Unidirectional for DC power rail protection<\/li>\n
  • RoHS compliant<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 5 V USB port ESD and surge protection<\/li>\n
    • MCU 5 V VCC rail overvoltage protection<\/li>\n
    • HDMI 5 V line protection<\/li>\n
    • Smartphone and tablet power port protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SMF5.0A is a 200 W unidirectional transient voltage suppression (TVS) diode in a SOD-123FL package, designed to protect 5 V circuits from ESD, EFT, and surge transients. As the 5 V variant of the SMF series, it provides the same form factor and protection capability as the SMF12A but optimized for 5 […]<\/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":[784],"chip_brand":[179],"class_list":["post-9542","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","tag-smf5-0a","chip_brand-gigadevice"],"acf":{"brief_explanation":"5V 200W TVS diode, unidirectional, SOD-123FL","date_code":"","package_case":"SOD-123FL (3.7 x 1.6 x 1.05 mm)","in_stock":12422,"datasheet":"https:\/\/www.littelfuse.com\/media\/?resourcetype=datasheet&id=7835","price":"$0.12 @ 1ku","product_introduction":"The SMF5.0A is a 200 W unidirectional TVS diode in a SOD-123FL package designed to protect 5 V circuits. With 5.0 V standoff voltage and clamping voltage around 9.2 V at rated current, it shields 5 V logic, USB power rails, and MCU VCC pins from ESD and surge damage. The SOD-123FL package provides a low-profile footprint for dense PCB layouts in consumer electronics.","working_principle":"The SMF5.0A operates on the same avalanche principle as the SMF12A but with a lower breakdown voltage optimized for 5 V rail protection. The lower voltage Zener structure results in higher leakage current (up to 800 uA at standoff) compared to the 12 V variant, which is an inherent characteristic of low-voltage TVS devices. The clamping voltage of approximately 9.2 V at full pulse current provides effective protection for 5 V CMOS logic with its absolute maximum rating of typically 7 V. The TVS response time is sub-nanosecond, faster than conventional Zener diodes due to the optimized avalanche structure.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Cathode<\/td>Output<\/td>Cathode (marked with band)<\/td><\/tr>\n
      2<\/td>Anode<\/td>Ground<\/td>Anode (connects to ground)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • 5 V USB port ESD and surge protection<\/li>\n
      • MCU 5 V VCC rail overvoltage protection<\/li>\n
      • HDMI 5 V line protection<\/li>\n
      • Smartphone and tablet power port protection<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Littelfuse<\/td>SMF5.0A<\/td>SOD-123FL<\/td>Original manufacturer<\/td><\/tr>\n
        Diotec<\/td>SMF5.0A<\/td>SOD-123FL<\/td>Second-source<\/td><\/tr>\n
        onsemi<\/td>SMBJ5.0A<\/td>SMB<\/td>Higher power 600W alternative<\/td><\/tr>\n
        Bourns<\/td>CDSOD323-T05C<\/td>SOD-323<\/td>5V alternative in SOD-323<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9542","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/comments?post=9542"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/9542\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=9542"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=9542"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=9542"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=9542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}