# SMAJ5919B-TP

**MCC(Micro Commercial Components)** · Zener Diodes · DO-214AC(SMA)

SMAJ5919B-TP from MCC(Micro Commercial Components), in a DO-214AC(SMA). 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | MCC(Micro Commercial Components) |
| Package | DO-214AC(SMA) |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener maximum dynamic impedance | ZZT |  |  | 2 | OHMS | @ IZT 66.9 mA | 2 |
| Knee maximum impedance | ZZK |  |  | 250 | OHMS | @ IZK 1.0 mA | 2 |
| Maximum reverse current | IR |  |  | 2.5 | A | @ VR 3.0 V | 2 |
| Forward voltage | VF |  |  | 1.5 | V | @ IF 200 mA | 1 |
| Storage temperature |  | -65 |  | 175 | °C |  | 1 |
| Junction temperature |  |  |  | 150 | °C |  | 1 |
| DC power dissipation |  |  |  | 1.5 | W | DC power dissipation | 1 |
| Thermal resistance junction to lead |  |  |  | 50 | °C/W | Junction to lead | 1 |
| Zener voltage tolerance (suffix B) | VZ | -5 |  | 5 | % | Suffix B; VZ tolerance 5% per Features | 1 |
| Zener voltage | VZ |  | 5.6 |  | V | @ IZT 66.9 mA | 2 |
| Zener test current | IZT |  | 66.9 |  | mA | Test current for VZ | 2 |
| Knee test current | IZK |  | 1 |  | mA | Knee current for ZZK | 2 |

## CAD (KiCad official)

- Symbol: `SMAJ5919B-TP`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `smaj5919b-tp-etched.step` / `smaj5919b-tp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `smaj5919b-tp.step` / `smaj5919b-tp.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [MCC(Micro Commercial Components) datasheet](docs/smaj5919b-tp-datasheet.pdf) (5 pp, sha256 `c945271c7018339e`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/smaj5919b-tp-datasheet.pdf)