# LBSS139WT1G

**LRC** · MOSFETs · SC-70

LBSS139WT1G from LRC, in a SC-70. 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 VGS limited to ±20 V continuous and a threshold VGS(th) of 0.5 V to 1.5 V. |
| 2 | Source | passive | Source of the N-channel MOSFET; continuous drain current is 200 mA at TA = 25°C and pulsed is 800 mA. |
| 3 | Drain | passive | Drain of the N-channel MOSFET, with a maximum drain-source voltage VDSS of 60 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | LRC |
| Package | SC-70 |
| Category | Triode/MOS Tube/Transistor |
| 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 | 60 |  |  | V | VGS = 0, ID = 250 μA | 2 |
| Gate Threshold Voltage | VGS(th) | 0.5 |  | 1.5 | V | VDS = VGS, ID = 1.0 mA | 2 |
| Forward Transconductance | gfs | 100 |  |  | mS | VDS = 25 V, ID = 200 mA, f = 1.0 MHz | 2 |
| Forward Voltage (Source-Drain Diode) | VSD |  |  | 1.3 | V | IS = 0.5 A, VGS = 0 V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 0.1 | μA | VGS = 0, VDS = 25 V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | 10 | μA | VGS = 0, VDS = 50 V | 2 |
| Gate-Body Leakage Current, Forward | IGSSF |  |  | 0.1 | μA | VGS = 20 V | 2 |
| Gate-Body Leakage Current, Reverse | IGSSR | -10 |  |  | μA | VGS = -20 V | 2 |
| Static Drain-Source On-State Resistance | RDS(on) |  | 5.6 | 10 | Ω | VGS = 2.75 V, ID < 200 mA | 2 |
| Static Drain-Source On-State Resistance | RDS(on) |  | 1.5 | 3.5 | Ω | VGS = 5.0 V, ID = 200 mA | 2 |
| Drain-Source Voltage | VDSS |  |  | 60 | V | TA = 25°C | 1 |
| Gate-to-Source Voltage, Continuous | VGS | -20 |  | 20 | V | Continuous | 1 |
| Drain Current, Continuous | ID |  |  | 200 | mA | TA = 25°C | 1 |
| Drain Current, Pulsed | IDM |  |  | 800 | mA | tp ≤ 10 μs | 1 |
| Junction and Storage Temperature | TJ,Tstg | -55 |  | 150 | °C |  | 1 |
| Maximum Lead Temperature for Soldering Purposes | TL |  |  | 260 | °C | for 10 seconds | 1 |
| Total Device Dissipation, FR-4 Board | PD |  |  | 150 | mW | TA = 25°C, FR-4 board (Note 1) | 1 |
| Derate above 25°C |  |  | 1.2 |  | mW/°C | above 25°C | 1 |
| Thermal Resistance, Junction-to-Ambient | RΘJA |  |  | 833 | °C/W | FR-4 board (Note 1) | 1 |

## CAD (KiCad official)

- Symbol: `LBSS139WT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SC-70 (KiCad packages3D, STEP)
- 3D model files: `lbss139wt1g-etched.step` / `lbss139wt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lbss139wt1g.step` / `lbss139wt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [LRC datasheet](docs/lbss139wt1g-datasheet.pdf) (6 pp, sha256 `e5945f7694d42448`, retrieved 2026-11-07, 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](docs/lbss139wt1g-datasheet.pdf)