# 1TC125BFNS008

**KDS Daishinku** · Crystals · DT-38

1TC125BFNS008 from KDS Daishinku, in a DT-38. 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 | KDS Daishinku |
| Package | DT-38 |
| Category | Crystals/Oscillators/Resonators |
| 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 |
|---|---|---|---|---|---|---|---|
| Drive level |  |  | 1 | 2 | µW |  | 1 |
| Series resistance |  |  |  | 30 | kΩ | DT-38, 32.768kHz | 1 |
| Turnover temperature |  | 20 | 25 | 30 | °C | +25°C ±5°C | 1 |
| Secondary temperature coefficient |  |  |  | -0.04 | ×10^-6/°C² | printed -0.04×10^-6/°C² max. | 1 |
| Operating temperature range |  | -10 |  | 60 | °C |  | 1 |
| Storage temperature range |  | -20 |  | 70 | °C |  | 1 |
| Nominal frequency |  |  | 32.768 |  | kHz | DT-38 | 1 |
| Load capacitance | CL |  | 12.5 |  | pF |  | 1 |
| Shunt capacitance | C0 |  | 1.3 |  | pF | DT-38 | 1 |

## CAD (KiCad official)

- Symbol: `1TC125BFNS008`
- Footprint: `Crystal:Crystal_C38-LF_D3.0mm_L8.0mm_Vertical`
- 3D model: DT-38 (KiCad packages3D, STEP)
- 3D model files: `1tc125bfns008-etched.step` / `1tc125bfns008-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1tc125bfns008.step` / `1tc125bfns008.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KDS Daishinku datasheet](docs/1tc125bfns008-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/1tc125bfns008-datasheet.pdf)