# BAT54S RFG

**Taiwan Semiconductor(Taiwan Semicon)** · Schottky Barrier Diodes (SBD) · SOT-23

BAT54S RFG from Taiwan Semiconductor(Taiwan Semicon), 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 Schottky diode (bottom-left pin in the BAT54S pin configuration drawing); 30V minimum reverse breakdown, 200mA forward continuous current. |
| 2 | K2 | passive | Cathode of the second Schottky diode (bottom-right pin in the BAT54S pin configuration drawing); 30V minimum reverse breakdown, 200mA forward continuous current. |
| 3 | K1/A2 | passive | Common center node joining the cathode of the first diode to the anode of the second diode in the series BAT54S configuration (top pin in the drawing). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Taiwan Semiconductor(Taiwan Semicon) |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Breakdown Voltage | V(BR) | 30 |  |  | V | IR=100µA | 1 |
| Forward Voltage | VF |  |  | 0.24 | V | IF=0.1mA | 1 |
| Forward Voltage | VF |  |  | 0.32 | V | IF=1mA | 1 |
| Forward Voltage | VF |  |  | 0.4 | V | IF=10mA | 1 |
| Forward Voltage | VF |  |  | 0.5 | V | IF=30mA | 1 |
| Forward Voltage | VF |  |  | 1 | V | IF=100mA | 1 |
| Reverse Current | IR |  |  | 2 | µA | VR=25V | 1 |
| Total Capacitance | CT |  |  | 10 | pF | VR=1V, f=1.0MHz | 1 |
| Reverse Recovery Time | trr |  |  | 5 | ns | IF=IR=10mA, RL=100Ω, IRR=1mA | 1 |
| Peak Repetitive Reverse Voltage | VRRM |  |  | 30 | V | TA=25℃ | 1 |
| Working Peak Reverse Voltage | VRWM |  |  | 30 | V | TA=25℃ | 1 |
| DC Reverse Voltage | VR |  |  | 30 | V | TA=25℃ | 1 |
| Forward Continuous Current | IF |  |  | 200 | mA |  | 1 |
| Repetitive Peak Forward Current | IFRM |  |  | 300 | mA | tp≤1S;δ≤0.5 | 1 |
| Forward Surge Current | IFSM |  |  | 600 | mA | t<1.0s | 1 |
| Thermal Resistance, Junction to Ambient | RθJA |  |  | 500 | °C/W |  | 1 |
| Operating and Storage Temperature | Tj, TSTG | -55 |  | 125 | °C |  | 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: `BAT54S RFG`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bat54s-rfg-etched.step` / `bat54s-rfg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54s-rfg.step` / `bat54s-rfg.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Taiwan Semiconductor(Taiwan Semicon) datasheet](docs/bat54s-rfg-datasheet.pdf) (5 pp, sha256 `d05103fd73fa8731`, retrieved 2026-10-22, 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/bat54s-rfg-datasheet.pdf)