# 2520-40-9-10-10

**Suzhou Liming Elec** · Crystals · SMD2520-4P

2520-40-9-10-10 from Suzhou Liming Elec, in a SMD2520-4P. 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 | Crystal terminal 1 (pad #1 on the bottom view), one of the two crystal connections. |
| 2 | GND | power_in | Connected to the cover; the datasheet says to connect it to ground. |
| 3 | 3 | passive | Crystal terminal 3 (pad #3 on the bottom view), one of the two crystal connections. |
| 4 | GND | power_in | Connected to the cover; the datasheet says to connect it to ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Suzhou Liming Elec |
| Package | SMD2520-4P |
| Category | Crystal Oscillator/Oscillator/Resonator |
| Pins | 4 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Equivalent Series Resistance | E.S.R |  |  | 60 | Ω | 30 MHz < Fo ≤ 54 MHz, mode A1 | 1 |
| Shunt Capacitance | Co |  |  | 3 | pF |  | 1 |
| Insulation Resistance |  | 500 |  |  | MΩ | DC100V | 1 |
| Aging |  | -1 |  | 1 | ppm / year |  | 1 |
| Level of Drive |  |  | 10 | 200 | µW |  | 1 |
| Storage Temperature Range |  | -40 |  | 125 | °C |  | 1 |
| Nominal Frequency | Fo |  | 40 |  | MHz | Standard frequency 40 MHz, from MPN | 1 |

## CAD (KiCad official)

- Symbol: `2520-40-9-10-10`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `2520-40-9-10-10-etched.step` / `2520-40-9-10-10-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `2520-40-9-10-10.step` / `2520-40-9-10-10.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Suzhou Liming Elec datasheet](docs/2520-40-9-10-10-datasheet.pdf) (2 pp, sha256 `558632c31dd3de5c`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-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/2520-40-9-10-10-datasheet.pdf)