# BAT54C-6AF

**FOSAN** · Schottky Diodes · SOT-23

BAT54C-6AF from FOSAN, 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 in the BAT54C-6AF common-cathode pair; its cathode is tied to pin 3 (30 V max reverse voltage, 100 mA forward current). |
| 2 | A2 | passive | Anode of the second Schottky diode in the BAT54C-6AF common-cathode pair; its cathode is tied to pin 3 (30 V max reverse voltage, 100 mA forward current). |
| 3 | K | passive | Common cathode of both Schottky diodes (BAT54C-6AF, marking KL3), joined internally to the cathodes of the diodes on pins 1 and 2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | FOSAN |
| 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 |
| Reverse Leakage Current | IR |  |  | 2 | µA | VR=25V | 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 |
| Diode Capacitance | CD |  |  | 10 | pF | VR=1V, f=1MHz | 1 |
| Reverse Recovery Time | Trr |  |  | 5 | nS |  | 1 |
| Reverse Work Voltage | VRWM |  |  | 30 | V |  | 1 |
| Forward Work Current | IF(IO) |  |  | 100 | mA |  | 1 |
| Peak Forward Current | IFM |  |  | 600 | mA |  | 1 |
| Power dissipation | PD |  |  | 225 | mW | Ta=25℃ | 1 |
| Junction and Storage Temperature | TJ,Tstg | -55 |  | 150 | ℃ |  | 1 |
| Thermal Resistance Junction-Ambient | RθJA |  |  | 555 | ℃/W |  | 1 |

## CAD (KiCad official)

- Symbol: `BAT54C-6AF`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `bat54c-6af-etched.step` / `bat54c-6af-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54c-6af.step` / `bat54c-6af.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FOSAN datasheet](docs/bat54c-6af-datasheet.pdf) (3 pp, sha256 `c7d59aa7bf0c8b6a`, retrieved 2026-10-21, 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` (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/bat54c-6af-datasheet.pdf)