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BSS123LT1G

Public Made by Adom

by adom

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

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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs bss123lt1g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers bss123lt1g: viewers · Ray 1mo ago
bss123lt1g-etched.fit.json bss123lt1g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bss123lt1g-etched.glb bss123lt1g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bss123lt1g-etched.step bss123lt1g: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
bss123lt1g.glb Publish 0.1.0 · Ray 1mo ago
bss123lt1g.kicad_mod Publish 0.1.0 · Ray 1mo ago
bss123lt1g.kicad_sym Publish 0.1.0 · Ray 1mo ago
bss123lt1g.lbr Publish 0.1.0 · Ray 1mo ago
bss123lt1g.step Publish 0.1.0 · Ray 1mo ago
package.json bss123lt1g: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json bss123lt1g: specified limits as data (metadata.characteristics, 17 rows from the datasheet) · Ray 23d ago
README.md bss123lt1g: specified limits as data (metadata.characteristics, 17 rows from the datasheet) · Ray 23d ago

BSS123LT1G

onsemi · MOSFETs · SOT-23

BSS123LT1G from onsemi, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GATE input Gate control input terminal rated for ±20 Vdc continuous or ±40 Vpk non-repetitive gate-source voltage to modulate drain-source channel conduction.
2 SOURCE power_in Source terminal providing the reference point for gate-source voltage and drain current definitions, serving as the return path typically connected to ground.
3 DRAIN output Drain terminal rated for maximum 100 Vdc drain-source voltage and 170 mA continuous drain current with RDS(on) of 6 Ω when VGS exceeds the threshold of 1.6 to 2.6 Vdc.

Key specifications

Parameter Value
Manufacturer onsemi
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 V(BR)DSS 100 Vdc VGS = 0, ID = 250 Adc 2
Zero Gate Voltage Drain Current IDSS 15 Adc VGS = 0, VDS = 100 Vdc, TJ = 25°C 2
Zero Gate Voltage Drain Current IDSS 60 Adc VGS = 0, VDS = 100 Vdc, TJ = 125°C 2
Gate-Body Leakage Current IGSS 50 nAdc VGS = 20 Vdc, VDS = 0 2
Gate Threshold Voltage VGS(th) 1.6 2.6 Vdc VDS = VGS, ID = 1.0 mAdc 2
Static Drain-Source On-Resistance rDS(on) 6 Ω VGS = 10 Vdc, ID = 100 mAdc 2
Forward Transconductance gfs 80 mmhos VDS = 25 Vdc, ID = 100 mAdc 2
Diode Forward On-Voltage VSD 1.3 V ID = 0.34 Adc, VGS = 0 Vdc 2
Drain-Source Voltage VDSS 100 Vdc 1
Gate-Source Voltage, Continuous VGS -20 20 Vdc Continuous 1
Gate-Source Voltage, Non-repetitive VGSM -40 40 Vpk Non-repetitive (tp ≤ 50 s) 1
Drain Current, Continuous ID 0.17 Adc Continuous (Note 1) 1
Drain Current, Pulsed IDM 0.68 Adc Pulsed (Note 2) 1
Total Device Dissipation, FR-5 Board PD 225 mW TA = 25°C, FR-5 board (Note 3) 1
Derate above 25°C PD 1.8 mW/°C Derate above 25°C 1
Thermal Resistance, Junction-to-Ambient RθJA 556 °C/W 1
Junction and Storage Temperature TJ, Tstg -55 150 °C 1

CAD (KiCad official)

  • Symbol: BSS123LT1G
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: bss123lt1g-etched.step / bss123lt1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bss123lt1g.step / bss123lt1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (5 pp, sha256 0992054b5b324f40, retrieved 2026-09-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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