# MMBD354LT1G

**onsemi** · Schottky Diodes · SOT-23

MMBD354LT1G 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 | ANODE | passive | Anode of one diode in the dual pair; the datasheet gives a continuous reverse voltage of 7.0 V per diode and a forward voltage of 0.60 V max at IF = 10 mAdc. |
| 2 | ANODE | passive | Anode of the second diode in the dual pair; the datasheet gives a continuous reverse voltage of 7.0 V per diode and a forward voltage of 0.60 V max at IF = 10 mAdc. |
| 3 | CATHODE | passive | Common cathode shared by both diodes; the datasheet gives a capacitance of 1.0 pF max at VR = 0 V, f = 1.0 MHz per diode. |

## 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 |
|---|---|---|---|---|---|---|---|
| Forward Voltage | VF |  |  | 0.6 | V | IF = 10 mAdc | 2 |
| Reverse Leakage Current | IR |  |  | 0.25 | µA | VR = 3.0 V | 2 |
| Reverse Leakage Current | IR |  |  | 10 | µA | VR = 7.0 V | 2 |
| Capacitance | C |  |  | 1 | pF | VR = 0 V, f = 1.0 MHz | 2 |
| Continuous Reverse Voltage | VR |  |  | 7 | V |  | 1 |
| Junction and Storage Temperature | TJ, Tstg | -55 |  | 150 | °C |  | 1 |
| Total Device Dissipation (FR-5 board) | PD |  |  | 225 | mW | TA = 25°C, FR-5 board (Note 1) | 1 |
| Total Device Dissipation (Alumina substrate) | PD |  |  | 300 | mW | TA = 25°C, alumina substrate (Note 2) | 1 |
| Thermal Resistance, Junction-to-Ambient (FR-5 board) | RθJA |  |  | 556 | °C/W | FR-5 board (Note 1) | 1 |
| Thermal Resistance, Junction-to-Ambient (Alumina substrate) | RθJA |  |  | 417 | °C/W | alumina substrate (Note 2) | 1 |
| Derate above 25°C (FR-5 board) | PD |  | 1.8 |  | mW/°C | Derate above 25°C, FR-5 board | 1 |
| Derate above 25°C (Alumina substrate) | PD |  | 2.4 |  | mW/°C | Derate above 25°C, alumina substrate | 1 |

## CAD (KiCad official)

- Symbol: `MMBD354LT1G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23 (KiCad packages3D, STEP)
- 3D model files: `mmbd354lt1g-etched.step` / `mmbd354lt1g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mmbd354lt1g.step` / `mmbd354lt1g.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/8590907323965784064) (3 pp, sha256 `3d25cf059d274449`, retrieved 2026-10-18, 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/mmbd354lt1g-datasheet.pdf)