# S3AB

**Shandong Jingdao Microelectronics** · Diodes - General Purpose · SMB(DO-214AA)

S3AB from Shandong Jingdao Microelectronics, in a SMB(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 of the rectifier diode; S3AB blocks 50 V maximum repetitive peak reverse voltage and passes 3 A average forward current. |
| 2 | Anode | passive | Anode of the rectifier diode; maximum instantaneous forward voltage is 1.1 V at 3 A and peak forward surge current is 90 A (8.3 ms half sine). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shandong Jingdao Microelectronics |
| Package | SMB(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 |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM |  |  | 50 | V |  | 1 |
| Maximum RMS voltage | VRMS |  |  | 35 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 50 | V |  | 1 |
| Maximum Average Forward Rectified Current | IF(AV) |  |  | 3 | A | Single phase half-wave 60 Hz, resistive or inductive load | 1 |
| Peak Forward Surge Current | IFSM |  |  | 90 | A | 8.3 ms single half sine wave superimposed on rated load | 1 |
| Maximum Instantaneous Forward Voltage | VF |  |  | 1.1 | V | at 3 A | 1 |
| Maximum DC Reverse Current | IR |  |  | 5 | μA | Ta=25 °C, at rated DC blocking voltage | 1 |
| Maximum DC Reverse Current | IR |  |  | 100 | μA | Ta=125 °C, at rated DC blocking voltage | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 |  | 150 | °C |  | 1 |
| Typical Junction Capacitance | Cj |  | 35 |  | pF | Measured at 1 MHz and applied reverse voltage of 4 V D.C | 1 |
| Typical Thermal Resistance | RθJA |  | 48 |  | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 |
| Typical Thermal Resistance | RθJC |  | 16 |  | °C/W | P.C.B. mounted with 2.0" X 2.0" (5 X 5 cm) copper pad areas | 1 |

## CAD (KiCad official)

- Symbol: `S3AB`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB(DO-214AA) (KiCad packages3D, STEP)
- 3D model files: `s3ab-etched.step` / `s3ab-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s3ab.step` / `s3ab.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shandong Jingdao Microelectronics datasheet](docs/s3ab-datasheet.pdf) (3 pp, sha256 `e7c97f83deec8f30`, retrieved 2026-10-23, tier: lcsc)
- **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:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/s3ab-datasheet.pdf)