# SS34FA

**onsemi** · Schottky Barrier Diodes (SBD) · SOD-123FL

SS34FA from onsemi, in a SOD-123FL. 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 SS34FA Schottky barrier rectifier, which has a repetitive peak reverse voltage (VRRM) of 40 V. |
| 2 | Anode | passive | Anode terminal of the SS34FA Schottky barrier rectifier; the datasheet gives no further pin-level limits for this terminal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SOD-123FL |
| Category | Diodes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum Instantaneous Forward Voltage | VF |  |  | 0.5 | V | IF = 3 A | 2 |
| Maximum Reverse Current at Rated VR, TJ = 125°C | IR |  |  | 60 | mA | TJ = 125°C | 2 |
| Repetitive Peak Reverse Voltage | VRRM |  |  | 40 | V |  | 1 |
| RMS Reverse Voltage | VRMS |  |  | 28 | V |  | 1 |
| DC Blocking Voltage | VR |  |  | 40 | V |  | 1 |
| Average Forward Rectified Current | IF(AV) |  |  | 3 | A |  | 1 |
| Peak Forward Surge Current | IFSM |  |  | 80 | A | 8.3 ms single half sine-wave superimposed on rated load | 1 |
| Operating Junction Temperature Range | TJ | -55 |  | 125 | °C |  | 1 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 1 |
| Thermal Characteristics, Junction-to-Lead | RθJL |  | 16 |  | °C/W | Per JESD51-3 recommended thermal test board (Note 1) | 1 |
| Thermal Resistance, Junction-to-Ambient | RθJA |  | 152 |  | °C/W | Per JESD51-3 recommended thermal test board (Note 1) | 1 |

## CAD (KiCad official)

- Symbol: `SS34FA`
- Footprint: `Diode_SMD:D_SOD-123F`
- 3D model: SOD-123FL (KiCad packages3D, STEP)
- 3D model files: `ss34fa-etched.step` / `ss34fa-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ss34fa.step` / `ss34fa.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/ss34fa-d.pdf) (6 pp, sha256 `5d108113814a7f3c`, retrieved 2026-10-21, tier: manufacturer)
- **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/ss34fa-datasheet.pdf)