# BAW56LT3G

**onsemi** · Diodes - General Purpose · SOT-23

BAW56LT3G from onsemi, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model). Symbol and footprint from KiCad-official CAD; the 3D model is generated from the datasheet's package dimensions.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CATHODE | passive | Cathode of the first switching diode (Style 12 pin 1); each diode is rated VR 70 V, IF 200 mA. |
| 2 | CATHODE | passive | Cathode of the second switching diode (Style 12 pin 2); each diode is rated VR 70 V, IF 200 mA. |
| 3 | ANODE | passive | Common anode of both diodes (Style 12 pin 3); each diode is rated IF 200 mA, with 2.0 A forward surge current (60 Hz, 1 cycle). |

## 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) | 70 |  |  | V | I(BR) = 100 µA | 2 |
| Reverse Leakage Current | IR |  |  | 30 | µA | VR = 25 V, TJ = 150°C | 2 |
| Reverse Leakage Current | IR |  |  | 2.5 | µA | VR = 70 V | 2 |
| Reverse Leakage Current | IR |  |  | 50 | µA | VR = 70 V, TJ = 150°C | 2 |
| Diode Capacitance | CD |  |  | 2 | pF | VR = 0 V, f = 1.0 MHz | 2 |
| Forward Voltage | VF |  |  | 715 | mV | IF = 1.0 mA | 2 |
| Forward Voltage | VF |  |  | 855 | mV | IF = 10 mA | 2 |
| Forward Voltage | VF |  |  | 1000 | mV | IF = 50 mA | 2 |
| Forward Voltage | VF |  |  | 1250 | mV | IF = 150 mA | 2 |
| Reverse Recovery Time | trr |  |  | 6 | ns | IF = IR = 10 mA, IR(REC) = 1.0 mA, RL = 100 Ω | 2 |
| Reverse Voltage | VR |  |  | 70 | V | each diode | 1 |
| Forward Current | IF |  |  | 200 | mA | each diode | 1 |
| Forward Surge Current | IFSM |  |  | 2 | A | 60 Hz @ 1 cycle | 1 |
| Non-Repetitive Peak Forward Current | IFSM |  |  | 4 | A | t = 1 s (Note 3) | 1 |
| Repetitive Peak Forward Current | IFRM |  |  | 500 | mA | Pulse Wave = 1 sec, Duty Cycle = 66% | 1 |
| Junction and Storage Temperature | TJ, Tstg | -55 |  | 150 | °C |  | 1 |
| Total Device Dissipation FR-5 Board | PD |  |  | 225 | mW | TA = 25°C (Note 1) | 1 |
| Derating above 25°C FR-5 Board |  |  |  | 1.8 | mW/°C | Derate above 25°C | 1 |
| Thermal Resistance, Junction-to-Ambient (FR-5) | RθJA |  |  | 556 | °C/W | FR-5 board | 1 |
| Total Device Dissipation Alumina Substrate | PD |  |  | 300 | mW | TA = 25°C (Note 2) | 1 |
| Derating above 25°C Alumina Substrate |  |  |  | 2.4 | mW/°C | Derate above 25°C | 1 |
| Thermal Resistance, Junction-to-Ambient (Alumina) | RθJA |  |  | 417 | °C/W | Alumina substrate | 1 |

## CAD (land: KiCad; 3D: generated from the datasheet)

- Symbol: `BAW56LT3G`
- Footprint: `Package_TO_SOT_SMD:SOT-23`
- 3D model: SOT-23, generated on the KiCad land (body 1.3 x 2.9 mm, terminals on the pads, 1.0 mm tall, datasheet A, nominal). KiCad's stock model for this land is taller than the datasheet allows, so the model is generated from the datasheet drawing; the dimensions come from the datasheet drawing where it was read and are defaults otherwise (see provenance.model_3d_generated), not the manufacturer's CAD (STEP)
- 3D model files: `baw56lt3g-etched.step` / `baw56lt3g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `baw56lt3g.step` / `baw56lt3g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/baw56lt3-d.pdf) (4 pp, sha256 `14669b3e97e9e1b9`, retrieved 2026-11-13, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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:** land: KiCad official libraries (CC-BY-SA 4.0); 3D: generated from the datasheet's package dimensions (provenance.model_3d_generated).

[Datasheet PDF](docs/baw56lt3g-datasheet.pdf)