component
BSS138LT3G
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
markdownBSS138LT3G
onsemi · MOSFETs · SOT-23
BSS138LT3G from onsemi, 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 | GATE | input | Gate of the N-channel MOSFET, with continuous gate-to-source voltage limited to ±20 Vdc and threshold VGS(th) specified at 0.85 to 1.5 Vdc. |
| 2 | SOURCE | passive | Source of the N-channel MOSFET, the reference terminal for the gate-to-source voltage rating of ±20 Vdc. |
| 3 | DRAIN | passive | Drain of the N-channel MOSFET, rated for 50 Vdc drain-to-source voltage, 200 mA continuous drain current at TA = 25°C, and 800 mA pulsed drain current (tp ≤ 10 s). |
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 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) | 0.85 | 1.5 | Vdc | VDS = VGS, ID = 1.0 mAdc | 2 | |
| Static Drain-to-Source On-Resistance | rDS(on) | 5.6 | 10 | Ω | VGS = 2.75 Vdc, ID < 200 mAdc, TA = −40°C to +85°C | 2 | |
| Static Drain-to-Source On-Resistance | rDS(on) | 3.5 | Ω | VGS = 5.0 Vdc, ID = 200 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 | VDD = 30 Vdc, ID = 0.2 Adc | 2 | ||
| 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 | ||
| Drain Current - Pulsed | 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 | Junction-to-Ambient | 1 |
CAD (KiCad official)
- Symbol:
BSS138LT3G - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files:
bss138lt3g-etched.step/bss138lt3g-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bss138lt3g.step/bss138lt3g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (6 pp, sha256
0fd56a5185ca2324, retrieved 2026-10-09, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).