# SMBJ58CAX

**Shenzhen JingYang** · ESD And Surge Protection (TVS/ESD) · SMB

SMBJ58CAX from Shenzhen JingYang, in a 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 | Pin1 | passive | Bidirectional TVS terminal; breakdown to Pin2 is 64.4 V min to 71.2 V max at 1.0 mA and leakage is 1 µA max at 58 V (T = 25 ℃). |
| 2 | Pin2 | passive | Bidirectional TVS terminal; breakdown to Pin1 is 64.4 V min to 71.2 V max at 1.0 mA and leakage is 1 µA max at 58 V (T = 25 ℃). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen JingYang |
| Package | 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 |
|---|---|---|---|---|---|---|---|
| Breakdown Voltage Pin1 to Pin2 | V1 | 64.4 |  | 71.2 | V | I(Pin1 to Pin2) = 1.0mA, T = 25℃ | 2 |
| Breakdown Voltage Pin2 to Pin1 | V2 | 64.4 |  | 71.2 | V | I(Pin2 to Pin1) = 1.0mA, T = 25℃ | 2 |
| Leakage Current Pin1 to Pin2 | I1 |  |  | 1 | μA | Vin=58V, T = 25℃ | 2 |
| Leakage Current Pin2 to Pin1 | I2 |  |  | 1 | μA | Vin=58V, T = 25℃ | 2 |

## CAD (KiCad official)

- Symbol: `SMBJ58CAX`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `smbj58cax-etched.step` / `smbj58cax-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smbj58cax.step` / `smbj58cax.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen JingYang datasheet](docs/smbj58cax-datasheet.pdf) (2 pp, sha256 `808bb0a52a87fdee`, 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/smbj58cax-datasheet.pdf)