# BT169-23

**KY** · Thyristors (SCR)/Modules · SOT-23

BT169-23 from KY, in a SOT-23. 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 | K | passive | Cathode of the SCR, pin 1 of the SOT-23 package (K(1) in the symbol). |
| 2 | A | passive | Anode of the SCR, pin 2 of the SOT-23 package (A(2) in the symbol); repetitive peak off-state/reverse voltage rating is 600V (BT169D). |
| 3 | G | input | Gate trigger input, pin 3 of the SOT-23 package (G(3) in the symbol); VGT ≤0.8V and IGT ≤200uA at VD=12V, IT=0.1A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | KY |
| Package | SOT-23 |
| Category | Transistors/Thyristors |
| Pins | 3 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Repetitive Peak Off-State Voltage (BT169D) | VDRM, VRRM |  |  | 600 | V | BT169D | 3 |
| Average On-state Current | IT(AV) |  |  | 0.6 | A |  | 3 |
| R.M.S On-State Current | IT(RMS) |  |  | 0.8 | A |  | 3 |
| Surge On-State Current | ITSM |  |  | 10 | A | F=50Hz Tp=10ms | 3 |
| I²t for fusing | I²t |  |  | 0.4 | A²s | Tp=10ms | 3 |
| Average Gate Power Dissipation | PG(AV) |  |  | 0.1 | W | Tj=125°C | 3 |
| Peak Gate Power Dissipation | PGM |  |  | 0.5 | W | tp=20us Tj=125°C | 3 |
| Operating Junction Temperature | Tj | -40 |  | 110 | °C |  | 3 |
| Storage Temperature | TSTG | -40 |  | 150 | °C |  | 3 |
| Repetitive Peak Off-State Current | IDRM |  |  | 5 | uA | Tc=25°C | 3 |
| Repetitive Peak Off-State Current | IDRM |  |  | 100 | uA | Tc=110°C | 3 |
| Repetitive Peak Reverse Current | IRRM |  |  | 5 | uA | Tc=25°C | 3 |
| Repetitive Peak Reverse Current | IRRM |  |  | 100 | uA | Tc=110°C | 3 |
| Forward on voltage | VTM |  |  | 1.7 | V | IT=1.2A tp=380us | 3 |
| Gate non-trigger voltage | VGD | 0.1 |  |  | V | VD=VDRM, Tj=110°C, RGK=1kΩ, RL=3.3KΩ | 3 |
| Gate trigger voltage | VGT |  |  | 0.8 | V | VD=12V, IT=0.1A | 3 |
| Holding current | IH |  |  | 4 | mA | IT=50mA | 3 |
| Latching current | IL |  |  | 6 | mA | IG=1.2 IGT | 3 |
| Gate trigger current | IGT |  |  | 200 | uA | VD=12V, IT=0.1A | 3 |
| Critical-rate of rise of commutation voltage | dv/dt | 10 |  |  | V/us | TJ=110°C, VD=2/3VDRM, RGK=1KΩ | 3 |
| Junction to case thermal resistance (TO-92/SOT-23) | Rth(j-c) |  | 75 |  | ℃/W | TO-92/SOT-23 | 3 |

## CAD (KiCad official)

- Symbol: `BT169-23`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bt169-23-etched.step` / `bt169-23-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bt169-23.step` / `bt169-23.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [KY datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588945072486830080) (7 pp, sha256 `ecd0865988f73474`, retrieved 2026-10-17, tier: lcsc)
- **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/bt169-23-datasheet.pdf)