# BMS2301

**BORN** · MOSFETs · SOT-323

BMS2301 from BORN, in a SOT-323. 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; controls the P-channel MOSFET, with VGS rated ±10 V maximum and threshold VGS(th) specified at VDS = VGS, ID = -250 µA. |
| 2 | S | passive | Source; body-diode anode side of the P-channel MOSFET, with drain-source voltage rated -20 V and continuous drain current -1.7 A. |
| 3 | D | passive | Drain; the single top-side lead of the P-channel MOSFET, with BVDS of -20 V and pulsed drain current of -3.0 A (tp=10 µs). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| Package | SOT-323 |
| 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 | BVDS |  |  | -20 | V |  | 1 |
| Gate-Source Voltage | VGS | -10 |  | 10 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -1.7 | A |  | 1 |
| Pulsed Drain Current | IDM |  |  | -3 | A | tp=10μs | 1 |
| Maximum Power Dissipation | PD |  |  | 0.29 | W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | °C |  | 1 |
| Drain-Source Breakdown Voltage | BVDS | -20 |  |  | V | VGS = 0V, ID = -250uA | 2 |
| Gate Body Leakage | IGSS | -100 |  | 100 | nA | VGS = ±10V, VDS = 0V | 2 |
| Zero Gate Voltage Drain Current | IDSS |  |  | -1 | uA | VDS = -20V, VGS = 0V | 2 |
| Gate Threshold Voltage | VGS(th) | -0.45 | -0.7 | -0.1 | V | VDS = VGS, ID = -250uA | 2 |
| Drain-Source On-State Resistance | RDS(on) |  | 95 | 120 | mΩ | VGS = -4.5V, ID = -1.7A | 2 |
| Drain-Source On-State Resistance | RDS(on) |  | 130 | 170 | mΩ | VGS = -2.5V, ID = -1.2A | 2 |
| Drain-Source On-State Resistance | RDS(on) |  | 180 | 250 | mΩ | VGS = -1.8V, ID = -0.3A | 2 |
| Total Gate Charge | Qg |  | 5.5 | 10 | nC | VDS = -10V, VGS = -4.5V, ID = -3.0A | 2 |
| Total Gate Charge | Qg |  | 3.3 | 6 | nC | VDS = -10V | 2 |
| Thermal Resistance from Junction to Ambient | RθJA |  | 431 |  | ◦C/W |  | 1 |

## CAD (KiCad official)

- Symbol: `BMS2301`
- Footprint: `Package_TO_SOT_SMD:SOT-323_SC-70`
- 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files: `bms2301-etched.step` / `bms2301-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bms2301.step` / `bms2301.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [BORN datasheet](docs/bms2301-datasheet.pdf) (3 pp, sha256 `b9951ab8b65d7b74`, retrieved 2026-11-04, 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/bms2301-datasheet.pdf)