{"id":10342,"date":"2026-07-19T12:25:18","date_gmt":"2026-07-19T12:25:18","guid":{"rendered":"https:\/\/ic-vendor.com\/smcj300a\/"},"modified":"2026-07-19T12:25:18","modified_gmt":"2026-07-19T12:25:18","slug":"smcj300a","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/smcj300a\/","title":{"rendered":"SMCJ300A"},"content":{"rendered":"

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

The SMCJ300A is a 1500W unidirectional TVS diode from Littelfuse’s SMCJ series in a DO-214AB (SMC) surface-mount package. It provides high-energy transient voltage suppression for power supply lines, VFDs, and IGBT inverter circuits with a reverse standoff voltage of 300V.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
Reverse Standoff Voltage (Vr)<\/td>\n300V<\/td>\n<\/tr>\n
Breakdown Voltage Min<\/td>\n335V<\/td>\n<\/tr>\n
Breakdown Voltage Max<\/td>\n371V<\/td>\n<\/tr>\n
Clamping Voltage (Vc)<\/td>\n486V<\/td>\n<\/tr>\n
Peak Pulse Power (10\/1000\u03bcs)<\/td>\n1500W<\/td>\n<\/tr>\n
Peak Pulse Current Ipp (10\/1000\u03bcs)<\/td>\n3.1A<\/td>\n<\/tr>\n
Peak Pulse Current Ipp (8\/20\u03bcs)<\/td>\n22.6A<\/td>\n<\/tr>\n
Leakage Current (Ir)<\/td>\n<1\u03bcA<\/td>\n<\/tr>\n
\u6781\u6027<\/td>\nUnidirectional<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nDO-214AB (SMC)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u00b0C \u81f3 +150\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • 1500W peak pulse power at 10\/1000\u03bcs<\/li>\n
  • Unidirectional \u2014 cathode band indicates polarity<\/li>\n
  • Excellent clamping capability<\/li>\n
  • IEC 61000-4-2 ESD 30kV<\/li>\n
  • UL recognized flammability V-0<\/li>\n
  • Halogen-free, RoHS compliant<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • VFD and IGBT inverter protection<\/li>\n
    • High-voltage DC power bus protection<\/li>\n
    • Industrial control power supply<\/li>\n
    • Telecom base station equipment<\/li>\n
    • General purpose transient suppression<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SMCJ300A is a 1500W unidirectional TVS diode from Littelfuse’s SMCJ series in a DO-214AB (SMC) surface-mount package. It provides high-energy transient voltage suppression for power supply lines, VFDs, and IGBT inverter circuits with a reverse standoff voltage of 300V. Key Specifications Reverse Standoff Voltage (Vr) 300V Breakdown Voltage Min 335V Breakdown Voltage […]<\/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":[60],"tags":[1613,1607,1614],"chip_brand":[200],"class_list":["post-10342","post","type-post","status-publish","format-standard","hentry","category-passive-components","tag-smcj300a","tag-tvs-diode","tag-unidirectional","chip_brand-littelfuse"],"acf":{"brief_explanation":"TVS Diode 1500W Uni-Dir 300Vr 486Vc DO-214AB SMC, -55~150\u00b0C","date_code":"","package_case":"DO-214AB (SMC)","in_stock":15000,"datasheet":"https:\/\/www.littelfuse.com\/media?res=700094&download=1","price":"","product_introduction":"The SMCJ300A is a 1500W unidirectional Transient Voltage Suppressor (TVS) diode from Littelfuse's SMCJ series. With a reverse standoff voltage of 300V and maximum clamping voltage of 486V, it provides robust protection for high-voltage DC power buses, VFDs, IGBT inverters, and industrial power supply circuits. The unidirectional configuration is optimized for DC power line protection where transients are expected in one polarity relative to ground.","working_principle":"Under normal forward operation, the TVS diode conducts like a regular diode. In the reverse direction, it blocks voltages up to the standoff voltage (300V) with negligible leakage current (<1\u03bcA). When a transient voltage exceeds the breakdown voltage (335-371V), the avalanche junction rapidly turns on and clamps the voltage to 486V maximum at the rated peak pulse current of 3.1A (10\/1000\u03bcs waveform). After the transient event subsides, the device automatically returns to its high-impedance blocking state.","pin_description":"
      Pin<\/th>Function<\/th><\/tr>
      1<\/td>Cathode (identified by color band)<\/td><\/tr>
      2<\/td>Anode<\/td><\/tr><\/table>","application_scenarios":"
      • VFD and IGBT inverter DC bus transient suppression<\/li>
      • Industrial 280V DC power bus protection<\/li>
      • Telecom base station power supply protection<\/li>
      • Renewable energy inverter DC link protection<\/li>
      • High-voltage power supply output clamping<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Vr<\/th>Pppm<\/th>Notes<\/th><\/tr>
        Vishay<\/td>SMCJ300A<\/td>300V<\/td>1500W<\/td>Direct cross<\/td><\/tr>
        STMicro<\/td>SMCJ300A<\/td>300V<\/td>1500W<\/td>Direct cross<\/td><\/tr>
        Bourns<\/td>SMCJ300A<\/td>300V<\/td>1500W<\/td>Direct cross<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10342","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=10342"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10342\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10342"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10342"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10342"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}