component
BSS138LT1G
Public Made by Adomby adom
onsemi MOSFETs, SOT-23. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBSS138LT1G
onsemi · MOSFETs · SOT-23
BSS138LT1G 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 terminal with ±20 Vdc maximum continuous voltage and 0.5-1.5 Vdc threshold voltage at 1 mA drain current. |
| 2 | SOURCE | passive | Source terminal serving as voltage reference for gate-source measurements and return current path. |
| 3 | DRAIN | passive | Drain terminal with 50 Vdc maximum rating, 200 mA continuous current at 25°C, and 800 mA pulsed current. |
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-to-Source Voltage | VDSS | 50 | Vdc | 1 | |||
| Gate-to-Source Voltage - Continuous | VGS | -20 | 20 | Vdc | 1 | ||
| Drain Current - Continuous | ID | 200 | mA | @ TA = 25°C | 1 | ||
| Pulsed Drain Current | IDM | 800 | mA | tp ≤ 10 s | 1 | ||
| Total Power Dissipation | PD | 225 | mW | @ TA = 25°C | 1 | ||
| Operating and Storage Temperature Range | TJ, Tstg | -55 | 150 | °C | 1 | ||
| Maximum Lead Temperature for Soldering Purposes | TL | 260 | °C | for 10 seconds | 1 | ||
| Thermal Resistance, Junction-to-Ambient | RθJA | 556 | °C/W | 1 | |||
| Drain-to-Source Breakdown Voltage | V(BR)DSS | 50 | Vdc | VGS = 0 Vdc, ID = 250 Adc | 2 | ||
| Zero Gate Voltage Drain Current | IDSS | 0.1 | Adc | VDS = 25 Vdc, VGS = 0 Vdc, 25°C | 2 | ||
| Zero Gate Voltage Drain Current | IDSS | 0.5 | Adc | VDS = 50 Vdc, VGS = 0 Vdc, 25°C | 2 | ||
| Zero Gate Voltage Drain Current | IDSS | 5 | Adc | VDS = 50 Vdc, VGS = 0 Vdc, 150°C | 2 | ||
| Gate-Source Leakage Current | IGSS | -0.1 | 0.1 | Adc | VGS = ± 20 Vdc, VDS = 0 Vdc | 2 | |
| Gate-Source Threshold Voltage | VGS(th) | 0.5 | 1.5 | Vdc | VDS = VGS, ID = 1.0 mAdc | 2 | |
| Forward Transconductance | gfs | 100 | mmhos | VDS = 25 Vdc, ID = 200 mAdc, f = 1.0 kHz | 2 | ||
| Input Capacitance | Ciss | 40 | 50 | pF | VDS = 25 Vdc, VGS = 0, f = 1 MHz | 2 | |
| Output Capacitance | Coss | 12 | 25 | pF | VDS = 25 Vdc, VGS = 0, f = 1 MHz | 2 | |
| Transfer Capacitance | Crss | 3.5 | 5 | pF | VDG = 25 Vdc, VGS = 0, f = 1 MHz | 2 | |
| Turn-On Delay Time | td(on) | 20 | ns | VDD = 30 Vdc, ID = 0.2 Adc | 2 | ||
| Turn-Off Delay Time | td(off) | 20 | ns | 2 |
CAD (KiCad official)
- Symbol:
BSS138LT1G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bss138lt1g-etched.step/bss138lt1g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bss138lt1g.step/bss138lt1g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (5 pp, sha256
9299f11ba9d3ebbd, retrieved 2026-09-21, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).