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LBSS138LT1G-MS

Public Made by Adom

by adom

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

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LBSS138LT1G-MS

MSKSEMI · MOSFETs · SOT-23

LBSS138LT1G-MS from MSKSEMI, 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 is rated ±20 V, with threshold of 0.8 V min to 1.5 V max at VGS=VDS, ID=250uA, and an embedded G-S ESD protection diode (ESD protected up to 2KV).
2 S passive Source; the source terminal of the 55 V, 0.3 A N-channel MOSFET, tied to the body diode and the gate ESD protection diode.
3 D passive Drain; rated for 55 V drain-source voltage and 0.3 A continuous drain current (TA=25℃), with RDS(ON) of 1.2 Ω typ at VGS=10V.

Key specifications

Parameter Value
Manufacturer MSKSEMI
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 Voltage VDS 55 V 2
Gate-Source Voltage VGS -20 20 V 2
Drain Current - Continuous ID 0.3 A TA=25℃ 2
Drain Current - Continuous ID 0.16 A TA=70℃ 2
Drain Current - Pulsed IDM 0.8 A Note 1 (repetitive rating, pulse width limited by max junction temperature) 2
Power Dissipation PD 0.35 W TA=25℃ 2
Storage Temperature Range TSTG -55 150 ℃ 2
Operating Junction Temperature Range TJ -55 150 ℃ 2
Thermal Resistance Junction to Ambient RθJA 357 ℃/W 2
Drain-Source Breakdown Voltage BVDSS 55 V VGS=0V, ID=250uA 3
Drain-Source Leakage Current IDSS 1 uA VDS=55V, VGS=0V, TJ=25℃ 3
Drain-Source Leakage Current IDSS 100 uA VDS=40V, VGS=0V, TJ=125℃ 3
Gate-Source Leakage Current IGSS -10 10 uA VGS=±20V, VDS=0V 3
Static Drain-Source On-Resistance RDS(ON) 1.2 1.5 Ω VGS=10V, ID=0.2A 3
Static Drain-Source On-Resistance RDS(ON) 1.5 2.5 Ω VGS=4.5V, ID=0.1A 3
Gate Threshold Voltage VGS(th) 0.8 1.1 1.5 V VGS=VDS, ID=250uA 3
Continuous Source Current IS 0.3 A VG=VD=0V, Force Current 3
Pulsed Source Current ISM 0.6 A 3
Diode Forward Voltage VSD 1.4 V VGS=0V, IS=0.2A, TJ=25℃ 3

CAD (KiCad official)

  • Symbol: LBSS138LT1G-MS
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)
  • 3D model files: lbss138lt1g-ms-etched.step / lbss138lt1g-ms-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lbss138lt1g-ms.step / lbss138lt1g-ms.glb are the bare package body.

Provenance

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

  • Datasheet: MSKSEMI datasheet (7 pp, sha256 5213897fd5c3aea8, retrieved 2026-10-18, tier: lcsc)
  • 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