# WI0402UC39NJST-HF

**DDY** · Inductors (SMD) · 0402

WI0402UC39NJST-HF from DDY, in a 0402. 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 | 1 | passive | Terminal 1 of an unpolarised inductor or ferrite bead; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised inductor or ferrite bead; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | DDY |
| Package | 0402 |
| Category | Inductors, Coils, Chokes |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum Q | Q | 25 |  |  |  | f = 250 MHz | 6 |
| Minimum self-resonant frequency | SRF | 2.1 |  |  | GHz |  | 6 |
| Maximum DC resistance | Rdc |  |  | 0.55 | Ω |  | 6 |
| Maximum rated DC current | Irms |  |  | 200 | mA |  | 6 |
| Inductance tolerance (code J, ±5%) |  | -5 |  | 5 | % | Part-number tolerance code J | 4 |
| Operating temperature |  | -40 |  | 85 | °C |  | 4 |
| Storage temperature |  | -10 |  | 40 | °C | R.H. 65% Max | 4 |
| Nominal inductance | L |  | 39 |  | nH | f = 250 MHz | 6 |

## CAD (KiCad official)

- Symbol: `WI0402UC39NJST-HF`
- Footprint: `Inductor_SMD:L_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `wi0402uc39njst-hf-etched.step` / `wi0402uc39njst-hf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wi0402uc39njst-hf.step` / `wi0402uc39njst-hf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DDY datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603062329835864064) (8 pp, sha256 `80b8dec9e7a71f5e`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `two-terminal 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/wi0402uc39njst-hf-datasheet.pdf)