# SBAT54ALT1G

**onsemi** · Schottky Diodes · SOT-23

SBAT54ALT1G from onsemi, 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 | CATHODE | passive | Cathode terminal of the Schottky diode; the datasheet's maximum ratings for the device are 30 V reverse voltage and 200 mA maximum DC forward current per diode. |
| 2 | CATHODE | passive | Second cathode terminal of the Schottky diode pair; the datasheet's maximum ratings for the device are 30 V reverse voltage and 200 mA maximum DC forward current per diode. |
| 3 | ANODE | passive | Anode terminal, which the datasheet gives as the single anode pin for this device; no separate pin-level limit is stated beyond the 30 V reverse voltage and 200 mA forward current maximum ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| 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)R | 30 |  |  | V | IR = 10 A | 2 |
| Total Capacitance | CT |  | 7.6 | 10 | pF | VR = 1.0 V, f = 1.0 MHz | 2 |
| Reverse Leakage | IR |  | 0.5 | 2 | Adc | VR = 25 V | 2 |
| Forward Voltage | VF |  | 0.22 | 0.24 | V | IF = 0.1 mA | 2 |
| Forward Voltage | VF |  | 0.29 | 0.32 | V | IF = 1.0 mA | 2 |
| Forward Voltage | VF |  | 0.35 | 0.4 | V | IF = 10 mA | 2 |
| Forward Voltage | VF |  | 0.41 | 0.5 | V | IF = 30 mA | 2 |
| Forward Voltage | VF |  | 0.52 | 0.8 | V | IF = 100 mA | 2 |
| Reverse Recovery Time | trr |  |  | 5 | ns | IF = IR = 10 mAdc, IR(REC) = 1.0 mAdc, Figure 1 | 2 |
| Reverse Voltage | VR |  |  | 30 | V |  | 1 |
| Forward Power Dissipation | PF |  |  | 225 | mW | @ TA = 25°C | 1 |
| Derate above 25°C | PF |  |  | 1.8 | mW/°C |  | 1 |
| Forward Current (DC) | IF |  |  | 200 | mA |  | 1 |
| Non-Repetitive Peak Forward Current | IFSM |  |  | 600 | mA | tp < 10 msec | 1 |
| Repetitive Peak Forward Current | IFRM |  |  | 300 | mA | Pulse Wave = 1 sec, Duty Cycle = 66% | 1 |
| Junction Temperature | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | Tstg | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `SBAT54ALT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `sbat54alt1g-etched.step` / `sbat54alt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sbat54alt1g.step` / `sbat54alt1g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586187846508564480) (4 pp, sha256 `ccf28c0a7d73a219`, retrieved 2026-10-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/sbat54alt1g-datasheet.pdf)