# D204S

**Senba Sensing Tech** · Biometric Sensors · TO-5-3

D204S from Senba Sensing Tech, in a TO-5-3. 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 | Drain | power_in | JFET drain, connected to the supply (+VDD) through an EMI filter; supply voltage range 3~15V (5V in the test circuit). |
| 2 | Source | output | JFET source-follower output, loaded by a source resistor Rs (47kΩ in the test circuit) to ground; source voltage 0.3~1.2V. |
| 3 | Ground | power_in | Ground (GND) connection of the sensor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Senba Sensing Tech |
| Package | TO-5-3 |
| Category | Sensors |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `D204S`
- Footprint: `Package_TO_SOT_THT:TO-5-3`
- 3D model: TO-5-3 (KiCad packages3D, STEP)
- 3D model files: `d204s-etched.step` / `d204s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `d204s.step` / `d204s.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Senba Sensing Tech datasheet](docs/d204s-datasheet.pdf) (6 pp, sha256 `42fa57cf57d477bb`, retrieved 2026-10-23, 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` (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/d204s-datasheet.pdf)