{"id":6694,"date":"2026-06-19T01:24:52","date_gmt":"2026-06-19T01:24:52","guid":{"rendered":"https:\/\/materialparts.com\/bc857bw\/"},"modified":"2026-06-19T01:24:52","modified_gmt":"2026-06-19T01:24:52","slug":"bc857bw","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/bc857bw\/","title":{"rendered":"BC857BW"},"content":{"rendered":"

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

The BC857BW from Nexperia is a 45V, 100 mA PNP general-purpose bipolar junction transistor in a tiny SOT-323 (SC-70) package. With hFE of 220-475 (B-group), 100 MHz transition frequency, and low saturation voltage, it is AEC-Q101 qualified (W-Q variant) and suitable for general-purpose switching and amplification in space-constrained automotive, industrial, and consumer applications.<\/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\n\n\n
\u0627\u0644\u0642\u0637\u0628\u064a\u0629<\/td>\nPNP<\/td>\n<\/tr>\n
VCEO (max)<\/td>\n-45V<\/td>\n<\/tr>\n
VCBO (max)<\/td>\n-50V<\/td>\n<\/tr>\n
VEBO (max)<\/td>\n-5V<\/td>\n<\/tr>\n
IC (max)<\/td>\n-100 mA (continuous), -200 mA (peak)<\/td>\n<\/tr>\n
hFE (B-group)<\/td>\n220 to 475 @ VCE=-5V, IC=-2mA<\/td>\n<\/tr>\n
VCE(sat) (max)<\/td>\n-250 mV @ IC=-100mA, IB=-5mA<\/td>\n<\/tr>\n
fT<\/td>\n100 MHz minimum<\/td>\n<\/tr>\n
ICBO (max)<\/td>\n-15 nA @ VCB=-20V<\/td>\n<\/tr>\n
Ptot<\/td>\n200 mW @ Tamb=25\u00b0C<\/td>\n<\/tr>\n
Rth(j-a)<\/td>\n625 K\/W (on FR4 PCB)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-65\u00b0C to +150\u00b0C<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nSOT-323 \/ SC-70 (2.0\u00d71.25\u00d70.95 mm)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • PNP general-purpose transistor in ultra-small SOT-323 package<\/li>\n
  • High current gain: hFE 220-475 (B-group, tight binning)<\/li>\n
  • Low VCE(sat): 250 mV max for efficient switching<\/li>\n
  • 100 MHz transition frequency for RF\/IF applications<\/li>\n
  • Low collector-base leakage: 15 nA max<\/li>\n
  • Complementary NPN types: BC847BW, BC846BW<\/li>\n
  • AEC-Q101 qualified (BC857BW-Q variant)<\/li>\n
  • Space-saving: 2.0\u00d71.25 mm footprint<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • General-purpose switching and signal amplification<\/li>\n
    • Load switching and driver circuits<\/li>\n
    • Audio preamplifier and signal processing<\/li>\n
    • Automotive sub-system control<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BC857BW from Nexperia is a 45V, 100 mA PNP general-purpose bipolar junction transistor in a tiny SOT-323 (SC-70) package. With hFE of 220-475 (B-group), 100 MHz transition frequency, and low saturation voltage, it is AEC-Q101 qualified (W-Q variant) and suitable for general-purpose switching and amplification in space-constrained automotive, industrial, and consumer applications. […]<\/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":[13,22],"tags":[],"chip_brand":[140],"class_list":["post-6694","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-video-ics","chip_brand-nexperia"],"acf":{"brief_explanation":"PNP transistor, 45V, 100mA, hFE 220-475, SOT-323","date_code":"","package_case":"SOT-323 \/ SC-70 (2.0\u00d71.25\u00d70.95 mm, 0.65mm pitch)","in_stock":50000,"datasheet":"https:\/\/assets.nexperia.com\/documents\/data-sheet\/BC856W_BC857W_BC858W.pdf","price":"$0.03 @ 1ku","product_introduction":"The BC857BW from Nexperia is a 45V, 100 mA PNP general-purpose transistor in an ultra-small SOT-323 (SC-70) package. With hFE of 220-475 (B-group), 100 MHz fT, low 250 mV saturation voltage, and complementary NPN BC847BW, it is ideal for general-purpose switching, signal amplification, and load driving in space-constrained designs including automotive and consumer applications.","working_principle":"The BC857BW is a PNP bipolar junction transistor (BJT) in a vertical structure. In active mode, current flows from emitter to collector when the base-emitter junction is forward-biased (VBE < -0.6V for PNP). The collector current is controlled by the base current multiplied by the DC current gain (hFE): IC = hFE \u00d7 IB. The B-group selection ensures tight hFE binning (220-475) for consistent circuit performance. The low VCE(sat) of 250 mV minimizes power dissipation in switching applications. The 100 MHz transition frequency (fT) indicates the frequency at which the current gain drops to unity, providing sufficient bandwidth for audio and lower-RF applications. The complementary NPN BC847BW enables push-pull and class-AB amplifier designs with matched characteristics.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Base<\/td>Input<\/td>Base terminal (current control input)<\/td><\/tr>\n
      2<\/td>Emitter<\/td>Power<\/td>Emitter terminal (current source for PNP)<\/td><\/tr>\n
      3<\/td>Collector<\/td>Output<\/td>Collector terminal (current output)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • General-purpose PNP switching and signal amplification<\/li>\n
      • Load switching: driving LEDs, relays, and small loads<\/li>\n
      • Audio preamplifier and signal processing with complementary NPN<\/li>\n
      • Automotive sub-system control and sensor interface<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Nexperia<\/td>BC857AW<\/td>SOT-323<\/td>A-group, hFE 125-250<\/td><\/tr>\n
        Nexperia<\/td>BC857CW<\/td>SOT-323<\/td>C-group, hFE 420-800<\/td><\/tr>\n
        Nexperia<\/td>BC857B<\/td>SOT-23<\/td>Same die, larger SOT-23 package<\/td><\/tr>\n
        Nexperia<\/td>BC856BW<\/td>SOT-323<\/td>65V version, lower voltage applications<\/td><\/tr>\n
        Infineon<\/td>BC857BW<\/td>SOT-323<\/td>Discontinued, Nexperia is recommended replacement<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6694","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=6694"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6694\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6694"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6694"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}