# C03579J047

**ECEC(ZheJiang E ast Crystal Elec)** · Crystals · HC-49S-SMD

C03579J047 from ECEC(ZheJiang E ast Crystal Elec), in a HC-49S-SMD. 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 a two-terminal crystal; either orientation. |
| 2 | 2 | passive | Terminal 2 of a two-terminal crystal; either orientation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ECEC(ZheJiang E ast Crystal Elec) |
| Package | HC-49S-SMD |
| Category | Crystals/Oscillators/Resonators |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `C03579J047`
- Footprint: `Crystal:Crystal_SMD_HC49-SD`
- 3D model: HC-49S-SMD (KiCad packages3D, STEP)
- 3D model files: `c03579j047-etched.step` / `c03579j047-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `c03579j047.step` / `c03579j047.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ECEC(ZheJiang E ast Crystal Elec) datasheet](docs/c03579j047-datasheet.pdf) (1 pp, sha256 ``, retrieved 2026-10-22, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `crystal numbering` (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/c03579j047-datasheet.pdf)