# 1SMA4742AG

**Shikues** · Zener Diodes · SMA

1SMA4742AG from Shikues, in a 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 | Cathode | passive | Cathode terminal of the Zener diode, listed as pin 1 in the PINNING table for the SMA outline (the Zener reverse-voltage side of the device). |
| 2 | Anode | passive | Anode terminal of the Zener diode, listed as pin 2 in the PINNING table for the SMA outline. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shikues |
| Package | 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 voltage (min) | VZT | 11.4 |  |  | V | at IZT = 21 mA; VZT tested with 20 ms pulses | 2 |
| Zener voltage (nominal) | VZT |  | 12 |  | V | at IZT = 21 mA; VZT tested with 20 ms pulses | 2 |
| Zener voltage (max) | VZT |  |  | 12.6 | V | at IZT = 21 mA; VZT tested with 20 ms pulses | 2 |
| Dynamic impedance | ZZT |  |  | 9 | Ω | at IZT = 21 mA | 2 |
| Reverse current | IR |  |  | 5 | µA |  | 2 |
| Power dissipation | PD |  |  | 1 | W | at Tc = 75°C | 1 |
| Forward voltage | VF |  |  | 1.2 | V | at IF = 200 mA | 1 |
| Junction temperature range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage temperature range | TS | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `1SMA4742AG`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `1sma4742ag-etched.step` / `1sma4742ag-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma4742ag.step` / `1sma4742ag.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shikues datasheet](docs/1sma4742ag-datasheet.pdf) (3 pp, sha256 `6d97a16d1a7af2a2`, retrieved 2026-10-23, 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/1sma4742ag-datasheet.pdf)