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BSS138-6AF

Public Made by Adom

by adom

FOSAN MOSFETs, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BSS138-6AF

FOSAN · MOSFETs · SOT-23

BSS138-6AF from FOSAN, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 G input Gate; gate-source voltage limited to ±20 V, with threshold VGS(th) of 0.8 V min, 1.2 V typ and 1.6 V max at ID=250 µA.
2 S passive Source; the body diode runs from source to drain, with forward drop VSD of 1.2 V max at ISD=300 mA.
3 D passive Drain; BVDSS is 50 V, continuous drain current is 340 mA at TA=25°C, and pulsed drain current is 1.5 A.

Key specifications

Parameter Value
Manufacturer FOSAN
Package SOT-23
Category Transistors/Thyristors
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Drain-Source Breakdown Voltage BVDSS 50 V ID =250uA, VGS=0V 2
Gate Threshold Voltage VGS(th) 0.8 1.2 1.6 V ID =250uA, VGS= VDS 2
Zero Gate Voltage Drain Current IDSS 0.5 uA VGS=0V, VDS= 50V 2
Gate Body Leakage IGSS 100 nA VGS=+20V, VDS=0V 2
Static Drain-Source On-State Resistance RDS(ON) 1.1 2.5 Ω ID=300mA, VGS=10V 2
Static Drain-Source On-State Resistance RDS(ON) 1.2 3 Ω ID=200mA, VGS=4.5V 2
Diode Forward Voltage Drop VSD 1.2 V ISD=300mA, VGS=0V 2
Drain-Source Voltage BVDSS 50 V 1
Gate-Source Voltage VGS 20 V 1
Drain Current (continuous) ID 340 mA TA = 25°C 1
Drain Current (pulsed) IDM 1.5 A 1
Total Device Dissipation PD 350 mW TA = 25°C 1
Thermal Resistance Junction-Ambient RΘJA 357 ℃/W 1
Junction/Storage Temperature TJ,Tstg -55 150 ℃ 1

CAD (KiCad official)

  • Symbol: BSS138-6AF
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bss138-6af-etched.step / bss138-6af-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bss138-6af.step / bss138-6af.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: FOSAN datasheet (4 pp, sha256 4f2e3e8df33d0d20, retrieved 2026-10-21, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF