# WI0402IFR33KST-HF

**DDY** · Inductors (SMD) · 0402

WI0402IFR33KST-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 the wire-wound chip inductor (tin terminal); WI0402IFR33KST-HF is 330 nH ±10% at 7.9 MHz, Rdc 0.56 Ω max, Isat 350 mA max, SRF 820 MHz min. |
| 2 | 2 | passive | Terminal 2 of the wire-wound chip inductor (tin terminal); non-polarized, interchangeable with terminal 1, operating temperature -40℃ to +85℃. |

## 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 |
|---|---|---|---|---|---|---|---|
| SRF (self-resonant frequency), minimum | SRF | 820 |  |  | MHz |  | 5 |
| DC resistance (Rdc), maximum | Rdc |  |  | 0.56 | Ω |  | 5 |
| Saturation DC current (Isat), maximum | Isat |  |  | 350 | mA | Inductance drop approximately 30% of L0 at Isat | 5 |
| Operating temperature |  | -40 |  | 85 | °C |  | 4 |
| Inductance tolerance (code K, ±10%) |  | -10 |  | 10 | % |  | 4 |
| Inductance (nominal, 0.33 µH as 330 nH) | L |  | 330 |  | nH | Freq 7.9 MHz | 5 |

## CAD (KiCad official)

- Symbol: `WI0402IFR33KST-HF`
- Footprint: `Inductor_SMD:L_0402_1005Metric`
- 3D model: 0402 (KiCad packages3D, STEP)
- 3D model files: `wi0402ifr33kst-hf-etched.step` / `wi0402ifr33kst-hf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `wi0402ifr33kst-hf.step` / `wi0402ifr33kst-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/8603062447909986304) (7 pp, sha256 `d1e80ea693aa6905`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/wi0402ifr33kst-hf-datasheet.pdf)