# 1N4448WS

**Yangzhou Yangjie Elec Tech** · Switching Diodes · SOD-323(SC-90)

1N4448WS from Yangzhou Yangjie Elec Tech, in a SOD-323(SC-90). 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOD-323(SC-90) |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| DC Blocking Voltage | VR |  |  | 75 | V | IR=100μA | 1 |
| Peak forward surge current | IFSM |  |  | 2 | A | tp=1μs | 1 |
| Average forward current | IFAV |  |  | 250 | mA |  | 1 |
| Power dissipation | Ptot |  |  | 200 | mW |  | 1 |
| Thermal Resistance | RthJA |  |  | 625 | ℃/W |  | 1 |
| Maximum junction temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Storage temperature range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Maximum Forward voltage | VF |  |  | 0.72 | V | IF=5.0mA | 1 |
| Maximum Forward voltage | VF |  |  | 0.855 | V | IF=10mA | 1 |
| Maximum Forward voltage | VF |  |  | 1 | V | IF=100mA | 1 |
| Maximum Forward voltage | VF |  |  | 1.25 | V | IF=150mA | 1 |
| Maximum Reverse current | IR |  |  | 25 | nA | VR=20V | 1 |
| Maximum Reverse current | IR |  |  | 30 | μA | VR=25V, TJ=150℃ | 1 |
| Maximum Reverse current | IR |  |  | 200 | nA | VR=75V | 1 |
| Maximum Reverse current | IR |  |  | 50 | μA | VR=75V, TJ=150℃ | 1 |
| Minimum Breakdown voltage | VR | 75 |  |  | V | IR=1μA | 1 |
| Maximum Diode capacitance | CD |  |  | 4 | pF | VR=VF=0V, f =1MHZ | 1 |
| Maximum Reverse recovery time | trr |  |  | 4 | ns | IF=10mA,Irr=0.1IR,RL=100Ω | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |

## CAD (KiCad official)

- Symbol: `1N4448WS`
- Footprint: `Diode_SMD:D_SOD-323`
- 3D model: SOD-323(SC-90) (KiCad packages3D, STEP)
- 3D model files: `1n4448ws-etched.step` / `1n4448ws-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1n4448ws.step` / `1n4448ws.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Yangzhou Yangjie Elec Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588906746995740672) (4 pp, sha256 `d555ddf7cec4167b`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/1n4448ws-datasheet.pdf)