{"id":6622,"date":"2026-06-18T15:45:39","date_gmt":"2026-06-18T15:45:39","guid":{"rendered":"https:\/\/materialparts.com\/mmbt3904-2\/"},"modified":"2026-06-18T15:45:39","modified_gmt":"2026-06-18T15:45:39","slug":"mmbt3904-2","status":"publish","type":"post","link":"https:\/\/materialparts.com\/es\/mmbt3904-2\/","title":{"rendered":"MMBT3904"},"content":{"rendered":"

Productos<\/h2>\n

The MMBT3904 from ON Semiconductor (and Nexperia) is an NPN general-purpose bipolar junction transistor in a SOT-23 surface-mount package. It is the SMD equivalent of the classic 2N3904 through-hole transistor, offering 40V VCEO, 200 mA IC, and 300 MHz transition frequency. Widely used for general-purpose amplification and switching in virtually every electronic design.<\/p>\n

Especificaciones<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Tipo<\/td>\nNPN Bipolar Junction Transistor<\/td>\n<\/tr>\n
VCEO (Collector-Emitter)<\/td>\n40V<\/td>\n<\/tr>\n
VCBO (Collector-Base)<\/td>\n60V<\/td>\n<\/tr>\n
VEBO (Emitter-Base)<\/td>\n6.0V<\/td>\n<\/tr>\n
IC (Continuous Collector Current)<\/td>\n200 mA<\/td>\n<\/tr>\n
hFE (DC Current Gain)<\/td>\n100-300 @ 10 mA, 1V<\/td>\n<\/tr>\n
VCE(sat)<\/td>\n0.2V max @ 10 mA, 1 mA<\/td>\n<\/tr>\n
VBE(sat)<\/td>\n0.85V max @ 10 mA, 1 mA<\/td>\n<\/tr>\n
fT (Transition Frequency)<\/td>\n300 MHz<\/td>\n<\/tr>\n
Power Dissipation<\/td>\n350 mW (FR-4 PCB)<\/td>\n<\/tr>\n
Temperatura de funcionamiento<\/td>\n-55\u00b0C to +150\u00b0C (junction)<\/td>\n<\/tr>\n
Paquete<\/td>\nSOT-23 (TO-236AB)<\/td>\n<\/tr>\n<\/table>\n

Caracter\u00edsticas<\/h2>\n
    \n
  • General-purpose NPN transistor for amplification and switching<\/li>\n
  • 300 MHz transition frequency for RF and high-speed applications<\/li>\n
  • Wide hFE range: 100-300 at 10 mA collector current<\/li>\n
  • Low saturation voltage: 0.2V max at 10 mA<\/li>\n
  • Complementary PNP: MMBT3906<\/li>\n
  • Industry-standard SOT-23 pinout (1=Base, 2=Emitter, 3=Collector)<\/li>\n
  • AEC-Q101 qualified versions available for automotive<\/li>\n<\/ul>\n

    Aplicaciones<\/h2>\n
      \n
    • General-purpose low-power amplification<\/li>\n
    • Digital logic switching and signal buffering<\/li>\n
    • LED driver and small load switching<\/li>\n
    • Emitter-follower and common-emitter circuits<\/li>\n
    • Sensor signal conditioning<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The MMBT3904 from ON Semiconductor (and Nexperia) is an NPN general-purpose bipolar junction transistor in a SOT-23 surface-mount package. It is the SMD equivalent of the classic 2N3904 through-hole transistor, offering 40V VCEO, 200 mA IC, and 300 MHz transition frequency. Widely used for general-purpose amplification and switching in virtually every electronic design. […]<\/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":[182],"class_list":["post-6622","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","category-logic-chips","chip_brand-onsemi"],"acf":{"brief_explanation":"NPN transistor, 40V, 200mA, 300MHz, SOT-23","date_code":"","package_case":"SOT-23 (2.9\u00d71.3\u00d71.0 mm, 1.9mm pitch)","in_stock":28500,"datasheet":"https:\/\/www.onsemi.com\/download\/data-sheet\/pdf\/mmbt3904lt1-d.pdf","price":"$0.01 @ 1ku","product_introduction":"The MMBT3904 from ON Semiconductor is the industry-standard SMD NPN general-purpose transistor in a SOT-23 package. With 40V VCEO, 200 mA IC, and 300 MHz transition frequency, it is the surface-mount equivalent of the classic 2N3904. Its high gain (hFE 100-300), low saturation voltage, and wide availability make it the default choice for amplification and switching in virtually every electronics design.","working_principle":"The MMBT3904 is a silicon NPN epitaxial planar transistor. Current flows from collector to emitter when the base-emitter junction is forward biased (VBE > 0.65V). The base current is amplified by the DC current gain (hFE), producing a larger collector current. In switching applications, the transistor is driven into saturation (VCE < 0.2V) by providing sufficient base current. The 300 MHz transition frequency indicates excellent high-frequency performance, making it suitable for RF and video signal amplification. The complementary PNP type MMBT3906 enables push-pull and class AB amplifier designs.","pin_description":"\n
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>\n
      1<\/td>Base<\/td>Input<\/td>Transistor base (control terminal)<\/td><\/tr>\n
      2<\/td>Emitter<\/td>Power<\/td>Transistor emitter<\/td><\/tr>\n
      3<\/td>Collector<\/td>Output<\/td>Transistor collector<\/td><\/tr>\n<\/table>","application_scenarios":"
        \n
      • General-purpose low-power signal amplification up to 100 MHz<\/li>\n
      • Digital logic switching and signal buffering\/level shifting<\/li>\n
      • LED driver and small load switching (up to 200 mA)<\/li>\n
      • Emitter-follower buffer and common-emitter amplifier circuits<\/li>\n
      • Sensor signal conditioning and impedance transformation<\/li>\n<\/ul>","alternative_models":"\n
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>\n
        Nexperia<\/td>MMBT3904,215<\/td>SOT-23<\/td>Direct equivalent from Nexperia<\/td><\/tr>\n
        Diodes Inc<\/td>MMBT3904-7-F<\/td>SOT-23<\/td>Direct equivalent from Diodes Inc<\/td><\/tr>\n
        ON Semi<\/td>MMBT2222ALT1G<\/td>SOT-23<\/td>Higher current (600mA), similar function<\/td><\/tr>\n
        ON Semi<\/td>MMBT3906LT1G<\/td>SOT-23<\/td>Complementary PNP version<\/td><\/tr>\n
        Various<\/td>2N3904<\/td>TO-92<\/td>Through-hole equivalent<\/td><\/tr>\n<\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6622","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/comments?post=6622"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/posts\/6622\/revisions"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/media?parent=6622"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/categories?post=6622"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/tags?post=6622"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/es\/wp-json\/wp\/v2\/chip_brand?post=6622"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}