# TF2305B

**TF** · MOSFETs · SOT-23

TF2305B from TF, 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 terminal of the P-channel MOSFET, with gate-source voltage rated at ±12 V (VGS). |
| 2 | SOURCE | passive | Source terminal of the P-channel MOSFET, with continuous source-drain diode current rated at -1.4 A (IS). |
| 3 | DRAIN | passive | Drain terminal of the P-channel MOSFET, with drain-source voltage rated at -16 V (VDS) and continuous drain current rated at -4.0 A (ID). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TF |
| Package | SOT-23 |
| 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 | -16 |  |  | V | VGS = 0V, ID =-250µA | 2 |
| Gate-source threshold voltage | VGS(th) | -0.5 | -0.7 | -1 | V | VDS =VGS, ID =-250µA | 2 |
| Gate-source leakage | IGSS | -100 |  | 100 | nA | VDS =0V, VGS =±10V | 2 |
| Zero gate voltage drain current | IDSS |  |  | -1 | µA | VDS =-15V, VGS =0V | 2 |
| Drain-source on-state resistance | RDS(on) |  | 0.045 | 0.05 | Ω | VGS =-4.5V, ID =-4.0A | 2 |
| Drain-source on-state resistance | RDS(on) |  | 0.075 | 0.08 | Ω | VGS =-2.5V, ID =-3.0A | 2 |
| Forward transconductance | gfs | 5 |  |  | S | VDS =-5V, ID =-2.0A | 2 |
| Continuous source-drain diode current | IS |  |  | -1.4 | A | TC=25℃ | 2 |
| Pulse diode forward current | ISM |  |  | -10 | A | Pulse Width < 300µs, Duty Cycle ≤2% | 2 |
| Body diode voltage | VSD |  | -0.8 | -1.2 | V | IS=-3.0A | 2 |
| Drain-Source Voltage | VDS |  |  | -16 | V |  | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V |  | 1 |
| Continuous Drain Current | ID |  |  | -4 | A |  | 1 |
| Pulsed Drain Current | IDM |  |  | -15 | A |  | 1 |
| Continuous Source-Drain Diode Current | IS |  |  | -1.4 | A |  | 1 |
| Maximum Power Dissipation | PD |  |  | 1 | W |  | 1 |
| Junction Temperature | TJ |  |  | 150 | ℃ |  | 1 |
| Storage Temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 125 | ℃/W | t ≤5s | 1 |

## CAD (KiCad official)

- Symbol: `TF2305B`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `tf2305b-etched.step` / `tf2305b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tf2305b.step` / `tf2305b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TF datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588912168117424128) (6 pp, sha256 `0268cea46722163c`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/tf2305b-datasheet.pdf)