{"id":2961,"date":"2026-05-28T15:23:59","date_gmt":"2026-05-28T15:23:59","guid":{"rendered":"https:\/\/materialparts.com\/1sma5931bt3g\/"},"modified":"2026-05-28T15:23:59","modified_gmt":"2026-05-28T15:23:59","slug":"1sma5931bt3g","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/1sma5931bt3g\/","title":{"rendered":"1SMA5931BT3G"},"content":{"rendered":"

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

The 1SMA5931BT3G from onsemi is a 1.5 Watt Zener Voltage Regulator Diode with a nominal Zener voltage of 18 V in a SMA (DO-214AC) surface mount package. It is AEC-Q101 qualified and suitable for automotive and general-purpose voltage regulation applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n
Zener Voltage (VZ)<\/td>\n18 V (nominal)<\/td>\n<\/tr>\n
VZ Tolerance<\/td>\n5%<\/td>\n<\/tr>\n
\u529f\u7387\u8017\u6563<\/td>\n1.5 W<\/td>\n<\/tr>\n
Zener Impedance (ZZT)<\/td>\n12 Ohm @ IZT<\/td>\n<\/tr>\n
Reverse Leakage Current<\/td>\n500 nA max @ VR<\/td>\n<\/tr>\n
IZM<\/td>\n83 mA<\/td>\n<\/tr>\n
ESD Rating<\/td>\nClass 3 (>16 kV HBM)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-65\u00b0C to +150\u00b0C<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSMA (DO-214AC)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Nominal Zener voltage: 18 V with 5% tolerance<\/li>\n
  • 1.5 W power dissipation in SMA package<\/li>\n
  • ESD rating Class 3 (>16 kV) per Human Body Model<\/li>\n
  • Flat handling surface for accurate placement<\/li>\n
  • Low profile surface mount package<\/li>\n
  • AEC-Q101 qualified and PPAP capable<\/li>\n
  • Pb-free and halogen-free construction<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • Voltage regulation and stabilization<\/li>\n
    • Waveform clipping circuits<\/li>\n
    • MOSFET gate protection<\/li>\n
    • Automotive electronics<\/li>\n
    • General-purpose voltage reference<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The 1SMA5931BT3G from onsemi is a 1.5 Watt Zener Voltage Regulator Diode with a nominal Zener voltage of 18 V in a SMA (DO-214AC) surface mount package. It is AEC-Q101 qualified and suitable for automotive and general-purpose voltage regulation applications. Key Specifications Zener Voltage (VZ) 18 V (nominal) VZ Tolerance 5% Power Dissipation […]<\/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-2961","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-on"],"acf":{"brief_explanation":"1.5W 18V Zener diode, SMA package, 5% tolerance, AEC-Q101, ESD Class 3","date_code":"","package_case":"SMA (DO-214AC) (4.32 x 2.6 x 2.0 mm)","in_stock":7948,"datasheet":"https:\/\/www.onsemi.com\/pdf\/datasheet\/1sma5913bt3-d.pdf","price":"\/tmp\/tmpqzvm_sik.sh.085 @ 5ku","product_introduction":"The 1SMA5931BT3G from onsemi is a 1.5 Watt surface mount Zener voltage regulator diode from the 1SMA59xxBT3G series. It provides a nominal Zener voltage of 18 V with 5% tolerance. The device features ESD protection exceeding 16 kV per Human Body Model, AEC-Q101 qualification for automotive applications, and a low-profile SMA package ideal for automated assembly. The flat handling surface ensures accurate pick-and-place positioning.","working_principle":"The 1SMA5931BT3G operates as a Zener diode in reverse breakdown mode. When the reverse voltage exceeds the Zener breakdown voltage of 18 V, the diode conducts and maintains a stable voltage across its terminals with low dynamic impedance of 12 Ohms. This voltage regulation characteristic makes it suitable for protecting sensitive circuitry from voltage transients and providing stable reference voltages. The device handles up to 1.5 W of power dissipation through its SMA package.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Cathode<\/td>Terminal<\/td>Cathode (indicated by polarity band)<\/td><\/tr>
      2<\/td>Anode<\/td>Terminal<\/td>Anode<\/td><\/tr><\/table>","application_scenarios":"
      • Voltage regulation in power supplies<\/li>
      • Overvoltage and ESD protection for MOSFET gates<\/li>
      • Automotive electronic control units<\/li>
      • Waveform clipping and signal limiting<\/li>
      • General-purpose voltage reference circuits<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        onsemi<\/td>1SMA5932BT3G<\/td>SMA<\/td>20V Zener, same series<\/td><\/tr>
        onsemi<\/td>1SMA5930BT3G<\/td>SMA<\/td>16V Zener, same series<\/td><\/tr>
        Nexperia<\/td>BZX384C18<\/td>SOD-323<\/td>18V 300mW smaller package<\/td><\/tr>
        Vishay<\/td>1SMB5931BT3G<\/td>SMB<\/td>18V 3W higher power<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2961","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=2961"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2961\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2961"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}