# 4420

**TF** · MOSFETs · SOP-8

4420 from TF, in a SOP-8. 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 | S | passive | Source of the N-channel MOSFET, one of three source pins tied internally (VDS max 30V). |
| 2 | S | passive | Source of the N-channel MOSFET, one of three source pins tied internally (VDS max 30V). |
| 3 | S | passive | Source of the N-channel MOSFET, one of three source pins tied internally (VDS max 30V). |
| 4 | G | input | Gate of the N-channel MOSFET, with gate-source voltage limited to ±12V and threshold VGS(th) 0.6 V min to 1.1 V typ at ID=250µA. |
| 5 | D | passive | Drain of the N-channel MOSFET, one of four drain pins tied internally (VDSS 30V, ID 12A at TA=25°C). |
| 6 | D | passive | Drain of the N-channel MOSFET, one of four drain pins tied internally (VDSS 30V, ID 12A at TA=25°C). |
| 7 | D | passive | Drain of the N-channel MOSFET, one of four drain pins tied internally (VDSS 30V, ID 12A at TA=25°C). |
| 8 | D | passive | Drain of the N-channel MOSFET, one of four drain pins tied internally (VDSS 30V, ID 12A at TA=25°C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TF |
| Package | SOP-8 |
| Category | Transistors |
| Pins | 8 |

## 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 | VDS |  |  | 30 | V | TA=25°C (value from product summary VDSS) | 1 |
| Gate-Source Voltage | VGS | -12 |  | 12 | V | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | 12 | A | TA=25°C | 1 |
| Continuous Drain Current | ID |  |  | 8 | A | TA=70°C | 1 |
| Pulsed Drain Current | IDM |  |  | 45 | A | Note B | 1 |
| Power Dissipation | PD |  |  | 3 | W | TA=25°C | 1 |
| Power Dissipation | PD |  |  | 1.8 | W | TA=70°C | 1 |
| Junction and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |
| Junction-to-Ambient Thermal Resistance | RθJA |  | 28 | 40 | °C/W | t ≤ 10s | 1 |
| Junction-to-Ambient Thermal Resistance | RθJA |  | 54 | 70 | °C/W | Steady-State | 1 |
| Junction-to-Lead Thermal Resistance | RθJL |  | 21 | 30 | °C/W | Steady-State | 1 |
| Drain-Source Breakdown Voltage | BVDSS | 30 |  |  | V | ID= 250µA, VGS=0V | 2 |
| Gate-Body Leakage Current | IGSS | -100 |  | 100 | nA | VDS=0V, VGS=±12V | 2 |
| Gate Threshold Voltage | VGS(th) | 0.6 | 1.1 | 2 | V | VDS=VGS ID= 250µA | 2 |
| On State Drain Current | ID(ON) | 45 |  |  | A | VGS= 10V, VDS= 5V | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 10.5 | mΩ | VGS= 10V, ID= 12A | 2 |
| Static Drain-Source On-Resistance | RDS(ON) |  |  | 12 | mΩ | VGS= 4.5V, ID= 8A | 2 |
| Diode Forward Voltage | VSD |  | 0.76 | 1 | V | IS= 3A , VGS=0V | 2 |
| Maximum Body-Diode Continuous Current | IS |  |  | 5 | A |  | 2 |
| Forward Transconductance | gFS |  | 9 |  | S | VDS= 15V, ID = 12A | 2 |
| Input Capacitance | Ciss |  | 3656 |  | pF | VGS=0V, VDS=25V, f=1MHz | 2 |
| Output Capacitance | Coss |  | 256 |  | pF | VGS=0V, VDS=25V, f=1MHz | 2 |
| Reverse Transfer Capacitance | Crss |  | 168 |  | pF | VGS=0V, VDS=25V, f=1MHz | 2 |
| Gate Resistance | Rg |  | 1.1 |  | Ω | VGS=0V, VDS=0V, f=1MHz | 2 |

## CAD (KiCad official)

- Symbol: `4420`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `4420-etched.step` / `4420-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `4420.step` / `4420.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TF datasheet](docs/4420-datasheet.pdf) (5 pp, sha256 `7cdfe2181ed8c276`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/4420-datasheet.pdf)