{"id":3668,"date":"2026-06-07T13:32:34","date_gmt":"2026-06-07T13:32:34","guid":{"rendered":"https:\/\/materialparts.com\/smcj54ca\/"},"modified":"2026-06-07T13:32:34","modified_gmt":"2026-06-07T13:32:34","slug":"smcj54ca","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/smcj54ca\/","title":{"rendered":"SMCJ54CA"},"content":{"rendered":"

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

The SMCJ54CA is a 1500W bidirectional transient voltage suppressor (TVS) diode in a DO-214AB (SMC) surface-mount package. With 54V standoff voltage, 60V minimum breakdown, and 87.1V maximum clamping voltage at 17.3A, it provides robust protection for 48V power rails and communication lines against lightning and surge transients.<\/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
\u0627\u0644\u0646\u0648\u0639<\/td>\nBidirectional TVS Diode<\/td>\n<\/tr>\n
Standoff Voltage (VRWM)<\/td>\n54 V<\/td>\n<\/tr>\n
Breakdown Voltage (VBR)<\/td>\n60 V min \/ 65.7 V max<\/td>\n<\/tr>\n
Clamping Voltage (VC)<\/td>\n87.1 V max @ IPP=17.3A<\/td>\n<\/tr>\n
Peak Pulse Current (IPP)<\/td>\n17.3 A (10\/1000us)<\/td>\n<\/tr>\n
Peak Pulse Power (PPPM)<\/td>\n1500 W (10\/1000us)<\/td>\n<\/tr>\n
Reverse Leakage (IR)<\/td>\n1 uA max @ 54V<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55 to +150 C (TJ)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nDO-214AB (SMC)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • 1500W peak pulse power (10\/1000us)<\/li>\n
  • 54V standoff voltage for 48V bus protection<\/li>\n
  • Bidirectional protection (positive and negative transients)<\/li>\n
  • 87.1V low clamping voltage at rated current<\/li>\n
  • 1uA maximum reverse leakage current<\/li>\n
  • Fast response time (virtually instantaneous)<\/li>\n
  • Glass passivated junction for reliability<\/li>\n
  • AEC-Q101 qualified versions available (-A suffix)<\/td>\n<\/tr>\n
  • UL flammability rating 94V-0<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • 48V telecom power supply surge protection<\/li>\n
    • Industrial 48V DC bus transient protection<\/li>\n
    • Automotive 48V mild hybrid system protection<\/li>\n
    • RS-485\/RS-422 communication line protection<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The SMCJ54CA is a 1500W bidirectional transient voltage suppressor (TVS) diode in a DO-214AB (SMC) surface-mount package. With 54V standoff voltage, 60V minimum breakdown, and 87.1V maximum clamping voltage at 17.3A, it provides robust protection for 48V power rails and communication lines against lightning and surge transients. Key Specifications Type Bidirectional TVS Diode […]<\/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":[13,20],"tags":[],"chip_brand":[200],"class_list":["post-3668","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-interface-ics","chip_brand-littelfuse"],"acf":{"brief_explanation":"1500W bidirectional TVS, 54V standoff, 87.1V clamp, DO-214AB (SMC)","date_code":"","package_case":"DO-214AB (SMC) (7.11 x 6.22 x 2.42 mm)","in_stock":11641,"datasheet":"https:\/\/www.littelfuse.com\/assetdocs\/littelfuse_tvs_diode_smcj_datasheet.pdf","price":"$0.25 @ 1ku","product_introduction":"The SMCJ54CA is a 1500W bidirectional transient voltage suppressor (TVS) diode in a DO-214AB (SMC) surface-mount package. The CA suffix indicates bidirectional (symmetrical clamping in both directions), making it suitable for AC signals or DC lines that may experience positive and negative transients. With a 54V standoff voltage, it is specifically designed to protect 48V nominal DC buses commonly found in telecom, industrial, and automotive (48V mild hybrid) applications. The 87.1V maximum clamping voltage at 17.3A peak pulse current ensures that protected downstream components see a limited voltage excursion during surge events. The 1500W peak pulse power rating per IEC 61000-4-5 (10\/1000us waveform) provides robust protection against secondary lightning effects and inductive switching transients.","working_principle":"The SMCJ54CA operates through two complementary protection mechanisms: (1) Bidirectional Avalanche Clamping: The device contains two back-to-back Zener\/avalanche diodes in a single chip. Under normal operating conditions (voltage below 54V), both diodes are in their high-impedance reverse-biased state with less than 1uA leakage. When a transient voltage exceeds the breakdown voltage (60V minimum) in either direction, the corresponding avalanche diode conducts, clamping the voltage to the specified maximum (87.1V at rated current). The bidirectional construction provides symmetrical protection for both positive and negative transients. (2) Energy Absorption: During a surge event, the TVS diode absorbs the transient energy by dissipating it as heat in the semiconductor junction. The 1500W peak pulse power rating is defined for a 10\/1000us waveform (IEC 61000-4-5). The glass passivated junction ensures reliable operation over the -55C to +150C temperature range. The device responds in picoseconds, effectively clamping the transient before it can damage downstream components.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Description<\/th><\/tr>
      1<\/td>Cathode\/Anode<\/td>Bidirectional<\/td>Terminal 1 (no polarity for bidirectional)<\/td><\/tr>
      2<\/td>Anode\/Cathode<\/td>Bidirectional<\/td>Terminal 2 (no polarity for bidirectional)<\/td><\/tr><\/table>","application_scenarios":"
      • 48V telecom DC bus surge protection with 54V standoff and 1500W peak pulse capability<\/li>
      • Industrial 48V power rail bidirectional TVS clamping to 87.1V at 17.3A surge current<\/li>
      • Automotive 48V mild hybrid system protection against load dump and ISO 7637 pulses<\/li>
      • RS-485\/RS-422 differential line bidirectional surge protection with 1uA low leakage<\/li><\/ul>","alternative_models":"
        Model<\/th>Manufacturer<\/th>VRWM<\/th>VC<\/th>Notes<\/th><\/tr>
        SMCJ54A<\/td>Various<\/td>54V<\/td>87.1V<\/td>Unidirectional version<\/td><\/tr>
        SMBJ54CA<\/td>Various<\/td>54V<\/td>86.7V<\/td>600W, smaller package<\/td><\/tr>
        5.0SMCJ54CA<\/td>Littelfuse<\/td>54V<\/td>87.1V<\/td>5kW version<\/td><\/tr>
        SMCJ48CA<\/td>Various<\/td>48V<\/td>77.4V<\/td>Lower voltage option<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/comments?post=3668"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/3668\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=3668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=3668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=3668"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=3668"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}