# SMBJ68A

**YFW** · TVS · DO-214AA(SMB)

SMBJ68A from YFW, in a DO-214AA(SMB). 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 unipolar SMBJ68A TVS diode (stand-off voltage VRWM 58.1V, breakdown 64.6V to 71.4V, max clamp 92V at 6.6A). |
| 2 | Anode | passive | Anode terminal of the unipolar SMBJ68A TVS diode, the polarity-reference side relative to the cathode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | DO-214AA(SMB) |
| Category | Circuit Protection |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse Stand-Off Voltage | VRWM |  | 58.1 |  | V |  | 2 |
| Breakdown Voltage | VBR | 64.6 |  | 71.4 | V | @ IT = 1 mA | 2 |
| Test Current | IT |  | 1 |  | mA |  | 2 |
| Reverse Leakage Current | IR |  |  | 1 | μA | @ VRWM | 2 |
| Maximum Clamp Voltage | VC |  |  | 92 | V | @ IPP | 2 |
| Peak Pulse Current | IPP |  |  | 6.6 | A | 10/1000 us waveform | 2 |
| Peak Pulse Power Dissipation | PPPM |  |  | 600 | W | TA=25°C (Note 1,2,5, Fig1) | 1 |
| Peak Forward Surge Current (UNI) | IFSM |  |  | 100 | A | 8.3ms single half sine-wave superimposed on rated load (JEDEC method) | 1 |
| ESD Voltage per IEC6100-4-2, Contact | VESD1 | -30 |  | 30 | kV | Contact | 1 |
| ESD Voltage per IEC6100-4-2, Air | VESD2 | -30 |  | 30 | kV | Air | 1 |
| Junction Capacitance | Cj |  | 390 |  | pF | VR=4V, f=1MHz | 1 |
| Thermal Resistance Junction to Ambient | RθJA |  | 100 |  | °C/W | Note 2 | 1 |
| Operating Junction and Storage Temperature Range | TJ,TSTG | -65 |  | 150 | °C |  | 1 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | 2. Mounted on 5mm2 copper pads to each terminal. | 1 |

## CAD (KiCad official)

- Symbol: `SMBJ68A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA(SMB) (KiCad packages3D, STEP)
- 3D model files: `smbj68a-etched.step` / `smbj68a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj68a.step` / `smbj68a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](docs/smbj68a-datasheet.pdf) (4 pp, sha256 `9a370f0c147b6c94`, retrieved 2026-10-22, 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/smbj68a-datasheet.pdf)