{"id":2554,"date":"2026-05-23T06:11:06","date_gmt":"2026-05-23T06:11:06","guid":{"rendered":"https:\/\/materialparts.com\/bss138lt1g\/"},"modified":"2026-05-23T06:11:06","modified_gmt":"2026-05-23T06:11:06","slug":"bss138lt1g","status":"publish","type":"post","link":"https:\/\/materialparts.com\/zh\/bss138lt1g\/","title":{"rendered":"BSS138LT1G"},"content":{"rendered":"

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

The BSS138LT1G from onsemi is an N-channel enhancement mode logic-level MOSFET in a SOT-23-3 package. Rated at 50V VDS and 200mA with low threshold voltage (0.85V-1.5V), it is specifically designed for low-voltage level shifting and switching in portable and battery-powered products.<\/p>\n

\u4e3b\u8981\u89c4\u683c<\/h2>\n\n\n\n\n\n\n\n\n\n
VDS (Max)<\/td>\n50V<\/td>\n<\/tr>\n
ID (Continuous)<\/td>\n200mA<\/td>\n<\/tr>\n
RDS(on) Max<\/td>\n3.5 Ohm @ VGS=5V, 200mA<\/td>\n<\/tr>\n
RDS(on) @ 2.75V<\/td>\n10 Ohm max<\/td>\n<\/tr>\n
VGS(th)<\/td>\n0.85V ~ 1.5V<\/td>\n<\/tr>\n
Forward Transconductance<\/td>\n100 mS (min)<\/td>\n<\/tr>\n
\u529f\u7387\u8017\u6563<\/td>\n225mW<\/td>\n<\/tr>\n
\u5305\u88c5<\/td>\nSOT-23-3 (TO-236)<\/td>\n<\/tr>\n<\/table>\n

\u7279\u70b9<\/h2>\n
    \n
  • Low threshold voltage for 1.8V-3.3V logic drive<\/li>\n
  • 50V drain-source voltage for level shifting<\/li>\n
  • Compact SOT-23 footprint<\/li>\n
  • AEC-Q101 qualified version available (BVSS138L)<\/li>\n
  • Pb-free, halogen-free, RoHS compliant<\/li>\n<\/ul>\n

    \u5e94\u7528<\/h2>\n
      \n
    • I2C and SPI level translation (1.8V to 3.3V)<\/li>\n
    • Logic-level signal switching<\/li>\n
    • DC-DC converter gate drive<\/li>\n
    • Power management in portable devices<\/li>\n
    • PCMCIA card and cellular phone circuits<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"

      Product Overview The BSS138LT1G from onsemi is an N-channel enhancement mode logic-level MOSFET in a SOT-23-3 package. Rated at 50V VDS and 200mA with low threshold voltage (0.85V-1.5V), it is specifically designed for low-voltage level shifting and switching in portable and battery-powered products. Key Specifications VDS (Max) 50V ID (Continuous) 200mA RDS(on) Max 3.5 Ohm […]<\/p>\n","protected":false},"author":2,"featured_media":2562,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,56],"tags":[],"chip_brand":[144],"class_list":["post-2554","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-integrated-circuits-ics","category-mosfets","chip_brand-on"],"acf":{"brief_explanation":"N-ch logic-level MOSFET, 50V, 200mA, 3.5Ohm, low Vth, SOT-23","date_code":"","package_case":"SOT-23-3 (TO-236) (2.9 x 1.3 x 1.0 mm)","in_stock":10560,"datasheet":"https:\/\/www.onsemi.com\/products\/discrete-power-modules\/mosfets\/small-signal-mosfets\/bss138lt","price":"$0.039 @ 3ku","product_introduction":"The BSS138LT1G is an N-channel small-signal MOSFET from onsemi with an exceptionally low gate threshold voltage (0.85V to 1.5V), making it ideal for direct drive from 1.8V and 2.5V logic levels. The 50V drain-source rating enables it to translate signals between different voltage domains, particularly popular for I2C and SPI bus level shifting between 1.8V\/2.5V\/3.3V rails. The SOT-23-3 package provides a compact footprint for space-constrained designs. An AEC-Q101 qualified version (BVSS138L) is available for automotive applications.","working_principle":"The BSS138L operates as a voltage-controlled N-channel MOSFET with an enhancement mode gate structure. The low threshold voltage (VGS(th) 0.85-1.5V) means the channel begins conducting at very low gate voltages, enabling direct interface with low-voltage digital logic. In level-shifting applications, the MOSFET is connected with drain pulled up to the higher voltage rail via a resistor, and source tied to the lower voltage rail. When the low-voltage input drives the gate, the MOSFET conducts, pulling the drain toward the source voltage, effectively translating the logic level. The open-drain configuration makes it ideal for bidirectional I2C level shifting.","pin_description":"
      Pin<\/th>Name<\/th>Type<\/th>Function<\/th><\/tr>
      1<\/td>Gate<\/td>Input<\/td>Gate control terminal<\/td><\/tr>
      2<\/td>Source<\/td>Power<\/td>Source terminal<\/td><\/tr>
      3<\/td>Drain<\/td>Output<\/td>Drain terminal<\/td><\/tr><\/table>","application_scenarios":"
      • I2C\/SMBus bidirectional level shifting (1.8V to 3.3V)<\/li>
      • SPI UART logic level translation<\/li>
      • Low-voltage digital signal switching<\/li>
      • DC-DC converter low-power switching element<\/li>
      • Battery-powered portable device power gating<\/li><\/ul>","alternative_models":"
        Manufacturer<\/th>Part Number<\/th>Package<\/th>Notes<\/th><\/tr>
        Nexperia<\/td>BSS138PW<\/td>SOT-323<\/td>Same die, smaller package<\/td><\/tr>
        Infineon<\/td>BSV81<\/td>SOT-23<\/td>N-ch, 50V, 220mA<\/td><\/tr>
        onsemi<\/td>2N7002LT1G<\/td>SOT-23<\/td>N-ch, 60V, 115mA, higher Vth<\/td><\/tr>
        Diodes Inc<\/td>MMBF170<\/td>SOT-23<\/td>N-ch, 60V, 500mA<\/td><\/tr><\/table>"},"_links":{"self":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2554","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=2554"}],"version-history":[{"count":0,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/posts\/2554\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media\/2562"}],"wp:attachment":[{"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/media?parent=2554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/categories?post=2554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/tags?post=2554"},{"taxonomy":"chip_brand","embeddable":true,"href":"https:\/\/materialparts.com\/zh\/wp-json\/wp\/v2\/chip_brand?post=2554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}