{"id":5142,"date":"2026-06-09T08:53:27","date_gmt":"2026-06-09T08:53:27","guid":{"rendered":"https:\/\/materialparts.com\/ll4148\/"},"modified":"2026-06-09T08:53:27","modified_gmt":"2026-06-09T08:53:27","slug":"ll4148","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/ll4148\/","title":{"rendered":"LL4148"},"content":{"rendered":"

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

The LL4148 is a general-purpose small-signal switching diode in a MiniMELF (SOD-80) glass package, the surface-mount equivalent of the industry-standard 1N4148.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
VRWM<\/td>\n75V<\/td>\n<\/tr>\n
IF<\/td>\n150 mA<\/td>\n<\/tr>\n
IFSM<\/td>\n2A (surge)<\/td>\n<\/tr>\n
VF<\/td>\n1V max @ IF=10mA<\/td>\n<\/tr>\n
IR<\/td>\n25 nA max @ VR=75V<\/td>\n<\/tr>\n
trr<\/td>\n4 ns typical<\/td>\n<\/tr>\n
Capacitance<\/td>\n2 pF @ VR=0V, 1MHz<\/td>\n<\/tr>\n
\u529f\u7387\u8017\u6563<\/td>\n500 mW<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nMiniMELF (SOD-80)<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u00b0C to +175\u00b0C<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • General-purpose switching diode<\/li>\n
  • Fast recovery: 4 ns typical<\/li>\n
  • Low capacitance: 2 pF<\/li>\n
  • MiniMELF glass package<\/li>\n
  • High temperature rated to 175\u00b0C<\/li>\n
  • Industry standard 1N4148 equivalent<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • High-speed switching<\/li>\n
    • Signal routing and steering<\/li>\n
    • Protection and clamping circuits<\/li>\n
    • General-purpose rectification<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The LL4148 is a general-purpose small-signal switching diode in a MiniMELF (SOD-80) glass package, the surface-mount equivalent of the industry-standard 1N4148. Key Specifications VRWM 75V IF 150 mA IFSM 2A (surge) VF 1V max @ IF=10mA IR 25 nA max @ VR=75V trr 4 ns typical Capacitance 2 pF @ VR=0V, 1MHz Power […]<\/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":[136],"class_list":["post-5142","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","chip_brand-vishay"],"acf":{"brief_explanation":"Small-signal switching diode, 75V, 150mA, 4ns trr, MiniMELF (SOD-80)","date_code":"","package_case":"MiniMELF \/ SOD-80 (3.5 x 1.5 mm)","in_stock":12506,"datasheet":"https:\/\/www.vishay.com\/docs\/85587\/ll4148.pdf","price":"$0.02 @ 1ku","product_introduction":"The LL4148 is a general-purpose small-signal switching diode in MiniMELF (SOD-80) glass package, equivalent to the industry-standard 1N4148 in surface-mount form. With 75V reverse voltage, 150mA forward current, 4ns typical reverse recovery time, and only 2pF capacitance, it is ideal for high-speed switching and signal routing. The glass package provides excellent temperature stability up to 175\u00b0C.","working_principle":"The LL4148 is a silicon planar epitaxial diode. Forward biased, it conducts with approximately 1V drop. Reverse biased, it blocks up to 75V with only 25 nA leakage. The fast 4ns reverse recovery time and low 2pF capacitance make it suitable for high-frequency signal switching.","pin_description":"
      Pin<\/th>Name<\/th>Function<\/th><\/tr>
      1<\/td>Cathode<\/td>Marked with band<\/td><\/tr>
      2<\/td>Anode<\/td>Unmarked end<\/td><\/tr><\/table>","application_scenarios":"
      • High-speed logic signal steering<\/li>
      • Protection and clamping circuits<\/li>
      • General-purpose signal rectification<\/li>
      • Small-signal switching networks<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Notes<\/th><\/tr>
        Vishay<\/td>1N4148W-7-F<\/td>SOD-123 version<\/td><\/tr>
        onsemi<\/td>MMSD4148T1G<\/td>SOD-123 version<\/td><\/tr>
        Nexperia<\/td>BAV99W<\/td>Dual diode SOD-323<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5142","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=5142"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/5142\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=5142"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=5142"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=5142"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=5142"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}