# 1SMA4747_R1_00001

**PANJIT International** · Zener Diodes · SMA(DO-214AC)

1SMA4747_R1_00001 from PANJIT International, in a SMA(DO-214AC). 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 end of the zener diode, identified by the color band on the package (polarity marking), and the diode is specified for 1 W power dissipation at 25°C ambient. |
| 2 | Anode | passive | Anode terminal of the zener diode, opposite the color-banded cathode end. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | PANJIT International |
| Package | SMA(DO-214AC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal Zener voltage |  | 19 | 20 | 21 | V | IZT = 12.5 mA | 2 |
| Zener voltage tolerance (standard) |  | -5 |  | 5 | % | Standard tolerance on nominal zener voltage (Note C) | 1 |
| Maximum Zener impedance | ZZT |  |  | 22 | Ω | @ IZT = 12.5 mA | 2 |
| Maximum Zener impedance (knee) | ZZK |  |  | 750 | Ω | @ IZK = 0.25 mA | 2 |
| Max reverse leakage current | IR |  |  | 0.1 | uA | @ VR = 15.2 V | 2 |
| Power dissipation (Note A) | PD |  |  | 1 | W | TA = 50°C, mounted on 5 mm² land areas; derate above 50°C | 1 |

## CAD (KiCad official)

- Symbol: `1SMA4747_R1_00001`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `1sma4747-r1-00001-etched.step` / `1sma4747-r1-00001-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma4747-r1-00001.step` / `1sma4747-r1-00001.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [PANJIT International datasheet](docs/1sma4747-r1-00001-datasheet.pdf) (8 pp, sha256 `ade1e47e16f747f2`, retrieved 2026-10-22, 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/1sma4747-r1-00001-datasheet.pdf)