# 1C237400AB0A

**KDS Daishinku** · Crystals · SMD3225-4P

1C237400AB0A from KDS Daishinku, in a SMD3225-4P. 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 | Terminal connected to the quartz crystal element; the datasheet states no electrical limits for this terminal. |
| 2 | 2 | unconnected | Terminal is open (not connected to the quartz element) and should be left unconnected. |
| 3 | 3 | passive | Terminal connected to the quartz crystal element; the datasheet states no electrical limits for this terminal. |
| 4 | 4 | unconnected | Terminal is open (not connected to the quartz element) and should be left unconnected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KDS Daishinku |
| Package | SMD3225-4P |
| 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 |  | -10 |  | 10 | ppm | at +25 ± 3 °C | 2 |
| Frequency characteristics over temperature (ref. to +25°C) |  | -12 |  | 12 | ppm | ref. to +25 °C, -20 ~ +75 °C | 2 |
| Series resistance |  |  |  | 50 | Ω | at Series | 2 |
| Shunt capacitance |  |  |  | 2 | pF |  | 2 |
| Insulation resistance |  | 500 |  |  | MΩ | DC 100 ± 15V | 2 |
| Operating temperature range |  | -20 |  | 75 | °C |  | 2 |
| Storage temperature range |  | -40 |  | 85 | °C |  | 2 |
| Nominal frequency |  |  | 37.4 |  | MHz |  | 2 |
| Load capacitance (CL) | CL |  | 10 |  | pF |  | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | gold | Plating material of a terminal. : Ni Plating + Au Plating. A clearance between the soldering terminal portion and a print circuit board side should be less than 0.1mm. | 3 |

## CAD (KiCad official)

- Symbol: `1C237400AB0A`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `1c237400ab0a-etched.step` / `1c237400ab0a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1c237400ab0a.step` / `1c237400ab0a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KDS Daishinku datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588907160474423296) (13 pp, sha256 `03429dba1edfef68`, retrieved 2026-10-20, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/1c237400ab0a-datasheet.pdf)