{"id":10480,"date":"2026-07-20T04:20:04","date_gmt":"2026-07-20T04:20:04","guid":{"rendered":"https:\/\/ic-vendor.com\/bc857blt1g\/"},"modified":"2026-07-20T04:20:04","modified_gmt":"2026-07-20T04:20:04","slug":"bc857blt1g","status":"publish","type":"post","link":"https:\/\/ic-vendor.com\/zh\/bc857blt1g\/","title":{"rendered":"BC857BLT1G"},"content":{"rendered":"

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

The onsemi BC857BLT1G is a PNP general-purpose bipolar junction transistor (BJT) housed in a SOT-23-3 surface-mount package. Designed for amplifier and switching applications, it offers a collector-emitter voltage of 45 V, a continuous collector current of 100 mA, and a transition frequency of 100 MHz. The device is AEC-Q101 qualified, making it suitable for automotive applications.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
\u6676\u4f53\u7ba1\u7c7b\u578b<\/td>\nPNP<\/td>\n<\/tr>\n
VCEO\uff08\u96c6\u7535\u6781-\u53d1\u5c04\u6781\u7535\u538b\uff09<\/td>\n-45 V<\/td>\n<\/tr>\n
VCBO (Collector-Base Voltage)<\/td>\n-50 V<\/td>\n<\/tr>\n
VEBO (Emitter-Base Voltage)<\/td>\n-5.0 V<\/td>\n<\/tr>\n
IC\uff08\u96c6\u7535\u6781\u7535\u6d41\uff09<\/td>\n-100 mA<\/td>\n<\/tr>\n
VCE(sat) (Max)<\/td>\n-650 mV @ 5 mA, 100 mA<\/td>\n<\/tr>\n
hFE (Min)<\/td>\n220 @ 2 mA, 5 V<\/td>\n<\/tr>\n
\u529f\u7387\u8017\u6563<\/td>\n300 mW<\/td>\n<\/tr>\n
\u8f6c\u6362\u9891\u7387 (fT)<\/td>\n100 MHz<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n-55\u00b0C to +150\u00b0C (TJ)<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-3 (TO-236)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • AEC-Q101 qualified and PPAP capable for automotive applications<\/li>\n
  • Low collector-emitter saturation voltage of 650 mV max<\/li>\n
  • High DC current gain (hFE min 220) for reliable amplification<\/li>\n
  • Wide operating temperature range from -55\u00b0C to +150\u00b0C<\/li>\n
  • Pb-Free, Halogen Free\/BFR Free, RoHS compliant<\/li>\n
  • Compact SOT-23-3 package for high-density PCB designs<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • General-purpose amplifier circuits<\/li>\n
    • Switching circuits in automotive electronics<\/li>\n
    • Signal processing and conditioning<\/li>\n
    • Current mirror and current source configurations<\/li>\n
    • Portable and battery-powered devices<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The onsemi BC857BLT1G is a PNP general-purpose bipolar junction transistor (BJT) housed in a SOT-23-3 surface-mount package. Designed for amplifier and switching applications, it offers a collector-emitter voltage of 45 V, a continuous collector current of 100 mA, and a transition frequency of 100 MHz. The device is AEC-Q101 qualified, making it suitable […]<\/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":[57,13],"tags":[1785],"chip_brand":[144],"class_list":["post-10480","post","type-post","status-publish","format-standard","hentry","category-insulated-gate-bipolar-transistors-igbt","category-integrated-circuits-ics","tag-bc857blt1g","chip_brand-on"],"acf":{"brief_explanation":"PNP BJT, 45V, 100mA, hFE 220, 300mW, SOT-23-3, AEC-Q101, 100MHz fT","date_code":"","package_case":"SOT-23-3 (TO-236) 2.9 x 1.3 x 1.0 mm","in_stock":8421,"datasheet":"https:\/\/www.onsemi.com\/pub\/Collateral\/BC856ALT1-D.PDF","price":"$0.023 @ 3ku","product_introduction":"The onsemi BC857BLT1G is a PNP silicon general-purpose bipolar junction transistor designed for amplifier and switching applications. Housed in the compact SOT-23-3 surface-mount package, this device offers a maximum collector-emitter voltage of 45 V and a continuous collector current of 100 mA. With a minimum DC current gain of 220 at 2 mA and a transition frequency of 100 MHz, it is well-suited for small-signal amplification and high-speed switching. The BC857BLT1G is AEC-Q101 qualified, ensuring reliability in automotive environments. It features a low collector-emitter saturation voltage of 650 mV maximum, contributing to efficient switching performance. The device is Pb-Free, Halogen Free\/BFR Free, and RoHS compliant.","working_principle":"The BC857BLT1G operates as a PNP bipolar junction transistor. In active mode, current flows from emitter to collector when the base is biased negative relative to the emitter. A small base current controls a larger collector current, with the gain factor hFE determining the amplification ratio (minimum 220 at 2 mA). The transistor enters saturation when both junctions are forward-biased, resulting in a low VCE(sat) of 650 mV max, making it efficient for switching applications. In cutoff mode, both junctions are reverse-biased and only minimal leakage current flows. The Schmitt-trigger-like hysteresis of the PN junctions provides inherent noise immunity.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Base<\/td>Input<\/td>Base terminal \u2014 controls transistor conduction<\/td><\/tr>\n
      2<\/td>Emitter<\/td>Power<\/td>Emitter terminal \u2014 current source in PNP operation<\/td><\/tr>\n
      3<\/td>Collector<\/td>Output<\/td>Collector terminal \u2014 current sink in active mode<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • General-purpose audio and signal amplification in consumer electronics<\/li>\n
      • Low-power switching circuits in portable devices<\/li>\n
      • Automotive control modules requiring AEC-Q101 qualification<\/li>\n
      • Current mirror and differential pair configurations in analog front-ends<\/li>\n
      • Load switching and driver circuits in industrial control systems<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Taiwan Semiconductor<\/td>BC857B RFG<\/td>SOT-23-3<\/td>Pin-to-pin compatible<\/td><\/tr>\n
        Nexperia<\/td>BC857B,215<\/td>SOT-23<\/td>Equivalent specifications<\/td><\/tr>\n
        Infineon<\/td>BC857B E6327<\/td>SOT-23<\/td>Pin-to-pin compatible<\/td><\/tr>\n
        ROHM<\/td>BC857BRA<\/td>SOT-23-3<\/td>Equivalent function<\/td><\/tr>\n
        onsemi<\/td>BC857BLT3G<\/td>SOT-23-3<\/td>Tape & Reel alternate packaging<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10480","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=10480"}],"version-history":[{"count":0,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/posts\/10480\/revisions"}],"wp:attachment":[{"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/media?parent=10480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/categories?post=10480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/tags?post=10480"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/ic-vendor.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=10480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}