{"id":6893,"date":"2026-06-22T01:57:09","date_gmt":"2026-06-22T01:57:09","guid":{"rendered":"https:\/\/ic-vendor.com\/smbj33ca\/"},"modified":"2026-06-22T01:57:09","modified_gmt":"2026-06-22T01:57:09","slug":"smbj33ca","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/ar\/smbj33ca\/","title":{"rendered":"SMBJ33CA"},"content":{"rendered":"

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

The SMBJ33CA from Littelfuse is a 600W bidirectional TVS diode with 33V working voltage and 53.3V clamping voltage in an SMB (DO-214AA) package with improved thermal performance.<\/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\n\n\n\n
\u0627\u0644\u0646\u0648\u0639<\/td>\n600W Bidirectional TVS Diode<\/td>\n<\/tr>\n
Peak Pulse Power (PPPM)<\/td>\n600 W @ 10\/1000 us<\/td>\n<\/tr>\n
Working Voltage (VRWM)<\/td>\n33 V<\/td>\n<\/tr>\n
Breakdown Voltage (VBR)<\/td>\n36.7 V (min) ~ 40.6 V (max)<\/td>\n<\/tr>\n
Clamping Voltage (VC)<\/td>\n53.3 V @ IPP=11.3A<\/td>\n<\/tr>\n
Peak Pulse Current (IPP)<\/td>\n11.3 A<\/td>\n<\/tr>\n
Leakage Current (IR)<\/td>\n1 uA (max) @ VRWM<\/td>\n<\/tr>\n
\u0627\u0644\u062a\u0643\u0648\u064a\u0646<\/td>\nBidirectional (CA suffix)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSMB (DO-214AA)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55C to +150C<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 600W peak pulse power dissipation<\/li>\n
  • 33V bidirectional protection<\/li>\n
  • SMB package with better thermal performance than SMA<\/li>\n
  • Low 1uA leakage current<\/li>\n
  • Bidirectional (CA suffix)<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • 24V\/28V power line transient protection<\/li>\n
    • Automotive electrical system protection<\/li>\n
    • Industrial surge protection<\/li>\n
    • Telecom line protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SMBJ33CA from Littelfuse is a 600W bidirectional TVS diode with 33V working voltage and 53.3V clamping voltage in an SMB (DO-214AA) package with improved thermal performance. Key Specifications Type 600W Bidirectional TVS Diode Peak Pulse Power (PPPM) 600 W @ 10\/1000 us Working Voltage (VRWM) 33 V Breakdown Voltage (VBR) 36.7 V […]<\/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":[19,13],"tags":[],"chip_brand":[200],"class_list":["post-6893","post","type-post","status-publish","format-standard","hentry","category-analog-linear-ics","category-integrated-circuits-ics","chip_brand-littelfuse"],"acf":{"brief_explanation":"TVS Diode, 600W Bi-dir, 33V WM, 53.3V Clamp, SMB","date_code":"","package_case":"SMB \/ DO-214AA (5.3 x 3.6 x 2.4 mm)","in_stock":23456,"datasheet":"https:\/\/www.littelfuse.com\/media?resourcetype=datasheet&itemid=78c49d8e-31c5-4a9e-a0d8-6f0c0b0e5f3b","price":"$0.09 @ 1ku","product_introduction":"The SMBJ33CA from Littelfuse is a 600W bidirectional TVS diode in an SMB (DO-214AA) package, electrically identical to the SMAJ33CA but with a larger package that provides better thermal performance and higher average power dissipation capability. The SMB package's larger solder footprint and increased body size reduce the thermal resistance from junction to PCB, allowing the device to absorb repetitive transients with lower temperature rise. The 33V working voltage suits 24V and 28V industrial and automotive systems. The bidirectional configuration clamps both positive and negative transients. For applications where PCB space allows, the SMBJ version is preferred over the SMAJ for improved long-term reliability under repetitive surge conditions.","working_principle":"The SMBJ33CA operates identically to the SMAJ33CA, using back-to-back avalanche diodes for bidirectional clamping. The key difference is in the package thermal characteristics: the SMB package has lower thermal resistance (Rth(j-a) approximately 75 K\/W vs 100 K\/W for SMA) due to its larger body and solder area. This means the device can absorb repetitive transients with less junction temperature rise, or equivalently, can handle higher average power dissipation. The silicon die itself is the same as in the SMAJ version. The clamping mechanism is identical: when the transient voltage exceeds VBR, the avalanche multiplication creates a low-impedance path that limits the voltage across the protected circuit to VC (53.3V at 11.3A).","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Anode<\/td>Terminal<\/td>Terminal 1 (bidirectional)<\/td><\/tr>
      2<\/td>Cathode<\/td>Terminal<\/td>Terminal 2 (bidirectional)<\/td><\/tr><\/table>","application_scenarios":"
      • 28V automotive power distribution with repetitive load dump transients<\/li>
      • 24V DIN rail power supply output protection with SMB thermal margin<\/li>
      • Telecom -48V bus bidirectional surge protection (use SMBJ58CA)<\/li>
      • Motor drive power stage transient voltage clamping<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Littelfuse<\/td>SMAJ33CA<\/td>SMA<\/td>Same specs, smaller SMA package<\/td><\/tr>
        onsemi<\/td>SMBJ33CA<\/td>SMB<\/td>Pin-compatible equivalent<\/td><\/tr>
        Bourns<\/td>SMBJ33CA<\/td>SMB<\/td>Pin-compatible equivalent<\/td><\/tr>
        Littelfuse<\/td>SMBJ33A<\/td>SMB<\/td>Unidirectional version<\/td><\/tr>
        Littelfuse<\/td>SMBJ36CA<\/td>SMB<\/td>36V version<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/6893","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=6893"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/posts\/6893\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/media?parent=6893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/categories?post=6893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/tags?post=6893"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6893"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}