{"id":6628,"date":"2026-06-18T15:45:47","date_gmt":"2026-06-18T15:45:47","guid":{"rendered":"https:\/\/materialparts.com\/s8550-2\/"},"modified":"2026-06-18T15:45:47","modified_gmt":"2026-06-18T15:45:47","slug":"s8550-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/ar\/s8550-2\/","title":{"rendered":"S8550"},"content":{"rendered":"

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

The S8550 from Jiangsu Changjiang Electronics Technology (JCET\/JCET) is a PNP general-purpose bipolar junction transistor in a TO-92 through-hole package. With 25V VCEO, 1.5A IC, and high current gain, it is widely used as a low-side PNP switch for relay driving, motor control, and power switching in consumer electronics and educational projects.<\/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
\u0627\u0644\u0646\u0648\u0639<\/td>\nPNP Bipolar Junction Transistor<\/td>\n<\/tr>\n
VCEO (Collector-Emitter)<\/td>\n25V<\/td>\n<\/tr>\n
VCBO (Collector-Base)<\/td>\n40V<\/td>\n<\/tr>\n
VEBO (Emitter-Base)<\/td>\n6V<\/td>\n<\/tr>\n
IC (Continuous Collector Current)<\/td>\n1.5A<\/td>\n<\/tr>\n
hFE (\u0643\u0633\u0628 \u0627\u0644\u062a\u064a\u0627\u0631 \u0627\u0644\u0645\u0633\u062a\u0645\u0631)<\/td>\n85-300 (classified by grade C\/D\/E)<\/td>\n<\/tr>\n
VCE(sat)<\/td>\n0.5V max @ 500 mA, 50 mA<\/td>\n<\/tr>\n
fT (Transition Frequency)<\/td>\n200 MHz<\/td>\n<\/tr>\n
\u062a\u0628\u062f\u064a\u062f \u0627\u0644\u0637\u0627\u0642\u0629<\/td>\n1W (at TC=25\u00b0C)<\/td>\n<\/tr>\n
\u062f\u0631\u062c\u0629 \u062d\u0631\u0627\u0631\u0629 \u0627\u0644\u062a\u0634\u063a\u064a\u0644<\/td>\n-55\u00b0C to +150\u00b0C (junction)<\/td>\n<\/tr>\n
\u0627\u0644\u062d\u0632\u0645\u0629<\/td>\nTO-92 (through-hole)<\/td>\n<\/tr>\n<\/table>\n

\u0627\u0644\u0645\u064a\u0632\u0627\u062a<\/h2>\n
    \n
  • High current capability: 1.5A continuous collector current<\/li>\n
  • Three gain grades: C (85-160), D (120-200), E (160-300)<\/li>\n
  • Complementary NPN type: S8050<\/li>\n
  • Low saturation voltage for efficient switching<\/li>\n
  • 200 MHz transition frequency<\/li>\n
  • TO-92 package for easy prototyping<\/li>\n
  • Extremely low cost, widely available<\/li>\n<\/ul>\n

    \u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a<\/h2>\n
      \n
    • PNP low-side switch for relay and solenoid driving<\/li>\n
    • Small DC motor speed control<\/li>\n
    • LED and buzzer driver<\/li>\n
    • Audio amplifier output stage (push-pull with S8050)<\/li>\n
    • General-purpose switching and amplification<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The S8550 from Jiangsu Changjiang Electronics Technology (JCET\/JCET) is a PNP general-purpose bipolar junction transistor in a TO-92 through-hole package. With 25V VCEO, 1.5A IC, and high current gain, it is widely used as a low-side PNP switch for relay driving, motor control, and power switching in consumer electronics and educational projects. Key […]<\/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":[13,15],"tags":[],"chip_brand":[299],"class_list":["post-6628","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-logic-chips","chip_brand-jcet"],"acf":{"brief_explanation":"PNP transistor, 25V, 1.5A, hFE 85-300, TO-92","date_code":"","package_case":"TO-92 (5.2\u00d75.2 mm body, 2.54mm pitch, through-hole)","in_stock":19800,"datasheet":"https:\/\/www.makerstore.com.au\/wp-content\/uploads\/2019\/03\/S8550.pdf","price":"$0.01 @ 1ku","product_introduction":"The S8550 is a PNP general-purpose bipolar junction transistor rated at 25V\/1.5A in a TO-92 through-hole package. With three gain grades (C\/D\/E) offering hFE from 85 to 300 and a complementary NPN type (S8050), it is one of the most popular low-cost transistors for relay driving, motor control, and push-pull amplifier circuits in consumer electronics and educational projects.","working_principle":"The S8550 is a PNP silicon epitaxial planar transistor. Current flows from emitter to collector when the emitter-base junction is forward biased (VEB > 0.65V). The base current is amplified by the DC current gain (hFE) to produce a larger collector current flowing from emitter to collector. As a PNP transistor, the emitter is at a higher voltage than the collector during normal operation. In switching applications, sufficient base current drives the transistor into saturation (VCE < 0.5V). The complementary NPN S8050 enables push-pull and class B amplifier configurations.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Emitter<\/td>Power<\/td>Transistor emitter (positive rail in PNP)<\/td><\/tr>\n
      2<\/td>Base<\/td>Input<\/td>Transistor base (control terminal)<\/td><\/tr>\n
      3<\/td>Collector<\/td>Output<\/td>Transistor collector (connects to load)<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • PNP low-side switch for relay, solenoid, and buzzer driving<\/li>\n
      • Small DC motor bidirectional control (H-bridge with S8050)<\/li>\n
      • LED driver and indicator lamp control<\/li>\n
      • Audio amplifier push-pull output stage paired with S8050<\/li>\n
      • General-purpose switching and signal amplification<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Various<\/td>S8550<\/td>TO-92<\/td>Multiple manufacturers produce equivalents<\/td><\/tr>\n
        Various<\/td>S8050<\/td>TO-92<\/td>Complementary NPN type<\/td><\/tr>\n
        ON Semiconductor<\/td>2N3906<\/td>TO-92<\/td>Lower current (200mA), higher voltage (40V)<\/td><\/tr>\n
        ON Semiconductor<\/td>2N2907A<\/td>TO-92<\/td>60V, 600mA, higher voltage PNP<\/td><\/tr>\n
        STMicroelectronics<\/td>BD136<\/td>SOT-32<\/td>1.5A, 45V, higher power PNP<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6628","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=6628"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/posts\/6628\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/media?parent=6628"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/categories?post=6628"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/tags?post=6628"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/ar\/wp-json\/wp\/v2\/chip_brand?post=6628"}],"curies":[{"name":"\u062f\u0628\u0644\u064a\u0648 \u0628\u064a","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}