# 1N4148WQ

**Yangzhou Yangjie Elec Tech** · Switching Diodes · SOD-123

1N4148WQ from Yangzhou Yangjie Elec Tech, in a SOD-123. 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-123 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Voltage | VR |  |  | 75 | V | Ta=25℃ | 1 |
| Repetitive Peak Reverse Voltage | VRRM |  |  | 100 | V | Ta=25℃ | 1 |
| Average Forward Current | IFAV |  |  | 150 | mA | Ta=25℃ | 1 |
| Repetitive Peak Forward Current | IFRM |  |  | 300 | mA | Ta=25℃ | 1 |
| Peak Forward Surge Current | IFSM |  |  | 2 | A | Pulse width=1 us | 1 |
| Peak Forward Surge Current | IFSM |  |  | 1 | A | Pulse width=1 s | 1 |
| Power Dissipation | Ptot |  |  | 400 | mW |  | 1 |
| Maximum Junction Temperature | Tj | -55 |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction to Ambient | RthJA |  |  | 315 | K/W |  | 1 |
| Forward Voltage | VF |  | 0.715 |  | V | IF=1mA | 2 |
| Forward Voltage | VF |  | 0.855 |  | V | IF=10mA | 2 |
| Forward Voltage | VF |  | 1 |  | V | IF=50mA | 2 |
| Forward Voltage | VF |  | 1.25 |  | V | IF=150mA | 2 |
| Reverse Current | IR |  | 0.025 |  | μA | VR=20V | 2 |
| Reverse Current | IR |  | 1 |  | μA | VR=75V | 2 |
| Breakdown Voltage | VR |  | 75 |  | V | IR=10μA | 2 |
| Diode Capacitance | CD |  | 4 |  | pF | VR=VF=0V, f =1MHZ | 2 |
| Reverse Recovery Time | trr |  | 4 |  | ns | IF=10mA,Irr=0.1IR,RL=100Ω | 2 |

## 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: `1N4148WQ`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123 (KiCad packages3D, STEP)
- 3D model files: `1n4148wq-etched.step` / `1n4148wq-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1n4148wq.step` / `1n4148wq.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/8589836834202288128) (5 pp, sha256 `64e0fc9dbf0d1894`, retrieved 2026-10-17, 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/1n4148wq-datasheet.pdf)