# S3BB

**onsemi** · Schottky Diodes · DO-214AA

S3BB from onsemi, in a DO-214AA. 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 S3BB rectifier, identified on the package by the color band, rated for a 100 V repetitive peak reverse voltage and 3 A average forward rectified current. |
| 2 | Anode | passive | Anode terminal of the S3BB rectifier, opposite the cathode color band, carrying forward current up to 3 A average with an 80 A peak non-repetitive surge (8.3 ms half sine). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DO-214AA |
| 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 |
|---|---|---|---|---|---|---|---|
| Repetitive Peak Reverse Voltage | VRRM |  |  | 100 | V | S3BB column | 3 |
| RMS Reverse Voltage | VRMS |  |  | 70 | V | S3BB column | 3 |
| DC Blocking Voltage | VR |  |  | 100 | V | S3BB column | 3 |
| Average Forward Rectified Current | IF(AV) |  |  | 3 | A |  | 3 |
| Peak Forward Surge Current | IFSM |  |  | 80 | A | 8.3 ms single half sine-wave superimposed on rated load | 3 |
| Operating Junction Temperature Range | TJ | -55 |  | 150 | °C |  | 3 |
| Storage Temperature Range | TSTG | -55 |  | 150 | °C |  | 3 |
| Instantaneous Forward Voltage | VF |  |  | 1.15 | V | IF = 3 A; pulse test PW = 300 µs, 1% duty cycle | 3 |
| Reverse Current at Rated VR | IR |  |  | 10 | μA | TJ = 25°C | 3 |
| Reverse Current at Rated VR | IR |  |  | 250 | μA | TJ = 125°C | 3 |
| Reverse Recovery Time | Trr |  |  | 1.5 | μs | IF = 0.5 A, IR = 1 A, Irr = 0.25 A | 3 |
| Typical Thermal Resistance, Junction-to-Ambient | RθJA |  | 148 |  | °C/W | Device mounted on FR-4 PCB, board size 76.2 mm x 114.3 mm per JESD51-3 | 3 |
| Typical Thermal Characteristics, Junction-to-Lead | ψJL |  | 14 |  | °C/W |  | 3 |
| Junction Capacitance | CJ |  | 40 |  | pF | VR = 4 V, f = 1 MHz | 3 |

## CAD (KiCad official)

- Symbol: `S3BB`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files: `s3bb-etched.step` / `s3bb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s3bb.step` / `s3bb.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/8590450024292790272) (7 pp, sha256 `02f9bef54af49911`, retrieved 2026-10-15, 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/s3bb-datasheet.pdf)