# C2SB24.000F12E12A

**Chuanjing Tech.** · Crystals · SMD2520-4P

C2SB24.000F12E12A from Chuanjing Tech., 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 | X1 | passive | Crystal terminal 1 of the 24.000MHz fundamental resonator (CL 12pF), connected to one side of the crystal in the connection diagram; marked by the chamfered pad. |
| 2 | GND | power_in | Ground pin, labelled GND in the connection diagram, not connected to the crystal element (case ground). |
| 3 | X2 | passive | Crystal terminal 2 of the 24.000MHz fundamental resonator (CL 12pF), connected to the other side of the crystal in the connection diagram. |
| 4 | GND | power_in | Ground pin, labelled GND in the connection diagram, not connected to the crystal element (case ground). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Chuanjing Tech. |
| Package | SMD2520-4P |
| Category | Crystals/Oscillators/Resonators |
| 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 |
|---|---|---|---|---|---|---|---|
| Frequency tolerance at normal temperature |  | -10 |  | 10 | ppm |  | 3 |
| Frequency stability over temperature | Topr | -20 |  | 20 | ppm | -20 ~ 70 ℃ | 3 |
| Equivalent series resistance | Rr |  |  | 60 | Ω |  | 3 |
| Shunt capacitance | C0 |  |  | 2 | pF | MAX | 3 |
| Insulation resistance | Rins | 500 |  |  | MΩ | at DC 100V | 3 |
| Aging |  | -3 |  | 3 | ppm | Per year | 3 |
| Drive level | DL |  | 100 | 200 | uW | MAX 200uW | 3 |
| Storage temperature | Tstg | -40 |  | 85 | ℃ |  | 3 |
| Operating temperature range | Topr | -20 |  | 70 | ℃ |  | 3 |
| Nominal frequency | FL |  | 24 |  | MHz | AT fundamental | 3 |
| Load capacitance | CL |  | 12 |  | pF |  | 3 |
| Product weight |  |  |  | 0.01 | g | MAX | 3 |

## CAD (KiCad official)

- Symbol: `C2SB24.000F12E12A`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `c2sb24-000f12e12a-etched.step` / `c2sb24-000f12e12a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `c2sb24-000f12e12a.step` / `c2sb24-000f12e12a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Chuanjing Tech. datasheet](docs/c2sb24-000f12e12a-datasheet.pdf) (8 pp, sha256 `71595da13f083415`, 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 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/c2sb24-000f12e12a-datasheet.pdf)