# BAT54CE

**ST(Semtech)** · Schottky Diodes · SOT-523

BAT54CE from ST(Semtech), in a SOT-523. 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 BAT54CE dual common-cathode pair (VR 30 V, IF(AV) 200 mA). |
| 2 | A2 | passive | Anode of the second Schottky diode in the BAT54CE dual common-cathode pair (VR 30 V, IF(AV) 200 mA). |
| 3 | K | passive | Common cathode of both Schottky diodes in the BAT54CE (VRRM 30 V, IFRM 300 mA per diode). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ST(Semtech) |
| Package | SOT-523 |
| 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 |  |  | 30 | V | Ta = 25 °C | 1 |
| Reverse Voltage | VR |  |  | 30 | V | Ta = 25 °C | 1 |
| Forward Current | IF(AV) |  |  | 200 | mA | Ta = 25 °C | 1 |
| Repetitive Peak Forward Current | IFRM |  |  | 300 | mA | Ta = 25 °C | 1 |
| Peak Forward Surge Current | IFSM |  |  | 600 | mA | tp = 10 ms | 1 |
| Total Power Dissipation | Ptot |  |  | 150 | mW | Ta = 25 °C | 1 |
| Junction Temperature | Tj |  |  | 125 | °C |  | 1 |
| Storage Temperature Range | Tstg | -65 |  | 150 | °C |  | 1 |
| Thermal Resistance from Junction to Ambient | RθJA |  |  | 667 | °C/W |  | 1 |
| Forward Voltage | VF |  |  | 240 | mV | at IF = 0.1 mA | 1 |
| Forward Voltage | VF |  |  | 320 | mV | at IF = 1 mA | 1 |
| Forward Voltage | VF |  |  | 400 | mV | at IF = 10 mA | 1 |
| Forward Voltage | VF |  |  | 500 | mV | at IF = 30 mA | 1 |
| Forward Voltage | VF |  |  | 1000 | mV | at IF = 100 mA | 1 |
| Reverse Breakdown Voltage | V(BR)R | 30 |  |  | V | at IR = 100 µA | 1 |
| Reverse Current | IR |  |  | 2 | µA | at VR = 25 V | 1 |
| Total Capacitance | Ctot |  |  | 10 | pF | at VR = 1 V, f = 1 MHz | 1 |
| Reverse Recovery Time | trr |  |  | 5 | ns | at IF = 10 mA through IR = 10 mA to IR = 1 mA, RL = 100 Ω | 1 |

## CAD (KiCad official)

- Symbol: `BAT54CE`
- Footprint: `Package_TO_SOT_SMD:SOT-523`
- 3D model: SOT-523, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 0.8 mm nominal SOT-523 height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `bat54ce-etched.step` / `bat54ce-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bat54ce.step` / `bat54ce.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ST(Semtech) datasheet](docs/bat54ce-datasheet.pdf) (2 pp, sha256 `6c6f46cf54dde28b`, retrieved 2026-11-05, 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/bat54ce-datasheet.pdf)