{"id":10483,"date":"2026-07-20T04:20:10","date_gmt":"2026-07-20T04:20:10","guid":{"rendered":"https:\/\/ic-vendor.com\/1smb5919bt3g\/"},"modified":"2026-07-20T04:20:10","modified_gmt":"2026-07-20T04:20:10","slug":"1smb5919bt3g","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/1smb5919bt3g\/","title":{"rendered":"1SMB5919BT3G"},"content":{"rendered":"

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

The onsemi 1SMB5919BT3G is a 500 mW Zener voltage regulator diode in an SMB (DO-214AA) surface-mount package. It provides a nominal Zener voltage of 5.6 V with \u00b15% tolerance, suitable for voltage regulation and protection in a variety of electronic applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Zener Voltage (VZ)<\/td>\n5.6 V (Nominal)<\/td>\n<\/tr>\n
Tolerance<\/td>\n\u00b15%<\/td>\n<\/tr>\n
\u529f\u7387\u8017\u6563\uff08\u6700\u5927\u503c\uff09<\/td>\n500 mW<\/td>\n<\/tr>\n
Test Current (IZT)<\/td>\n28.2 mA<\/td>\n<\/tr>\n
Zener Impedance (ZZT)<\/td>\n7 \u03a9 (Typ)<\/td>\n<\/tr>\n
Reverse Leakage Current<\/td>\n0.1 \u00b5A @ 2 V<\/td>\n<\/tr>\n
Forward Voltage (VF)<\/td>\n1.1 V @ 200 mA<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u00b0C to +150\u00b0C (TJ)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSMB (DO-214AA)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 500 mW steady-state power dissipation in compact SMB package<\/li>\n
  • Nominal 5.6 V Zener voltage with \u00b15% tolerance<\/li>\n
  • Low Zener impedance of 7 \u03a9 typical for stable regulation<\/li>\n
  • Wide operating temperature range from -55\u00b0C to +150\u00b0C<\/li>\n
  • Pb-Free and RoHS compliant<\/li>\n
  • Ideal for 5V logic level protection and regulation<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • 5V logic level voltage regulation and protection<\/li>\n
    • Reference voltage generation for ADC\/DAC circuits<\/li>\n
    • Overvoltage protection for microcontroller I\/O<\/li>\n
    • Power supply clamping circuits<\/li>\n
    • Automotive and industrial control systems<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The onsemi 1SMB5919BT3G is a 500 mW Zener voltage regulator diode in an SMB (DO-214AA) surface-mount package. It provides a nominal Zener voltage of 5.6 V with \u00b15% tolerance, suitable for voltage regulation and protection in a variety of electronic applications. Key Specifications Zener Voltage (VZ) 5.6 V (Nominal) Tolerance \u00b15% Power Dissipation […]<\/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":[1788],"chip_brand":[144],"class_list":["post-10483","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","tag-1smb5919bt3g","chip_brand-on"],"acf":{"brief_explanation":"Zener diode, 5.6V, 500mW, \u00b15%, SMB (DO-214AA), IZT 28.2mA","date_code":"","package_case":"SMB (DO-214AA) 5.6 x 3.6 x 2.2 mm","in_stock":6847,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/1SMB5913BT3-D.PDF","price":"$0.039 @ 3ku","product_introduction":"The onsemi 1SMB5919BT3G is a 5.6 V Zener voltage regulator diode from the 1SMB59xxB series, housed in an SMB surface-mount package. Designed for voltage regulation and transient suppression, it offers 500 mW power dissipation with \u00b15% tolerance. The 5.6 V nominal Zener voltage makes it particularly suitable for 5V logic level protection, as it clamps slightly above the standard 5V supply rail. The low Zener impedance of 7 \u03a9 ensures minimal voltage variation under load changes. The device is Pb-Free and RoHS compliant, operating over the full -55\u00b0C to +150\u00b0C temperature range.","working_principle":"The 1SMB5919BT3G operates in reverse breakdown mode. When the reverse voltage across the diode reaches the Zener breakdown voltage (5.6 V nominal), the PN junction enters avalanche breakdown, conducting current while maintaining a nearly constant voltage. The Zener impedance of 7 \u03a9 represents the slope resistance in this region \u2014 lower impedance means better regulation. At a test current of 28.2 mA, the voltage is held within \u00b15% of the nominal value. In forward bias, the diode conducts at approximately 1.1 V (like a standard silicon diode). Power dissipation is limited to 500 mW at 25\u00b0C, with linear derating above this temperature.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Cathode<\/td>Terminal<\/td>Marked by band \u2014 connect to higher voltage for Zener regulation<\/td><\/tr>\n
      2<\/td>Anode<\/td>Terminal<\/td>Connect to lower voltage or ground for Zener regulation<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • 5V logic supply rail overvoltage protection in digital circuits<\/li>\n
      • Reference voltage generation for ADC and DAC systems<\/li>\n
      • Microcontroller I\/O pin clamping against ESD and transients<\/li>\n
      • Power supply output voltage stabilization<\/li>\n
      • Automotive ECU input protection circuits<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Vishay<\/td>SMBJ5V6A<\/td>SMB<\/td>TVS variant, 5.6V standoff<\/td><\/tr>\n
        Nexperia<\/td>BZG03C5V6<\/td>SMB<\/td>Equivalent Zener, 1.3W<\/td><\/tr>\n
        onsemi<\/td>1SMB5919AT3G<\/td>SMB<\/td>\u00b15% tolerance variant<\/td><\/tr>\n
        ROHM<\/td>SMBZ5V6<\/td>SMB<\/td>Equivalent 5.6V Zener<\/td><\/tr>\n
        onsemi<\/td>1N5242BRLG<\/td>DO-35<\/td>Through-hole 5.6V Zener, 500mW<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/comments?post=10483"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10483\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10483"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}