# BAV70 RFG

**Taiwan Semiconductor** · Switching Diodes · SOT-23

BAV70 RFG from Taiwan Semiconductor, 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 | A1 | passive | Anode of the first diode in the BAV70 dual common-cathode pair; the drawing shows it at the bottom-left lead, and the datasheet gives 70 V peak repetitive reverse voltage and 200 mA mean forward current per the ratings table. |
| 2 | A2 | passive | Anode of the second diode in the BAV70 dual common-cathode pair; the drawing shows it at the bottom-right lead, and the datasheet gives 70 V peak repetitive reverse voltage and 200 mA mean forward current per the ratings table. |
| 3 | K | passive | Common cathode of both BAV70 diodes; the drawing shows it at the single top lead, and the datasheet gives 70 V peak repetitive reverse voltage for the part. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Taiwan Semiconductor |
| Package | SOT-23 |
| Category | Diodes |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak repetitive reverse voltage | VRRM |  |  | 70 | V |  | 1 |
| Power dissipation | PD |  |  | 225 | mW |  | 1 |
| Repetitive peak forward current | IFRM |  |  | 450 | mA |  | 1 |
| Mean forward current | IO |  |  | 200 | mA |  | 1 |
| Non-repetitive peak forward surge current | IFSM |  |  | 2 | A | Pulse Width=1 µsec | 1 |
| Non-repetitive peak forward surge current | IFSM |  |  | 0.5 | A | Pulse Width=1 sec | 1 |
| Junction and storage temperature range | TJ, TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal resistance from junction to ambient | RθJA |  |  | 556 | °C/W |  | 1 |
| Forward voltage | VF |  |  | 1 | V | IF = 50 mA | 1 |
| Forward voltage | VF |  |  | 1.25 | V | IF = 150 mA | 1 |
| Reverse breakdown voltage | V(BR) | 70 |  |  | V | IR = 100 µA | 1 |
| Reverse leakage current | IR |  |  | 2.5 | µA | VR = 70 V | 1 |
| Junction capacitance | CJ |  |  | 1.5 | pF | VR = 0 V, f = 1 MHz | 1 |
| Reverse recovery time | trr |  |  | 6 | ns | IF = IR = 10 mA, RL = 100 Ω, IRR = 1 mA | 1 |

## 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 |  | tin | - Matte Tin(Sn) lead finish with Nickel(Ni) underplate - Pb free and RoHS compliant | 1 |

## CAD (KiCad official)

- Symbol: `BAV70 RFG`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bav70-rfg-etched.step` / `bav70-rfg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bav70-rfg.step` / `bav70-rfg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Taiwan Semiconductor datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588904693137616896) (4 pp, sha256 `07dfe236894b8b45`, retrieved 2026-10-21, 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/bav70-rfg-datasheet.pdf)