# 1SMA4765A

**TWGMC** · Zener Diodes · SMA(DO-214AC)

1SMA4765A from TWGMC, 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 of the unipolar zener diode (1SMA4765A: 1 W max power dissipation at Tc=75°C, forward voltage 1.2 V max at IF=200 mA). |
| 2 | Anode | passive | Anode of the unipolar zener diode (junction and storage temperature range -55 to +150 °C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TWGMC |
| 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 |
|---|---|---|---|---|---|---|---|
| Zener Voltage | VZT | 104 | 110 | 116 | V | at IZT | 3 |
| Test Current | IZT |  | 2.3 |  | mA |  | 3 |
| Dynamic Impedance | ZZT |  |  | 450 | Ω | at IZT | 3 |
| Reverse Current | IR |  |  | 1 | µA | at VR | 3 |
| Reverse Voltage | VR |  | 84 |  | V | for IR | 3 |
| Admissible Zener Current | IZM |  |  | 8.6 | mA |  | 3 |
| Power Dissipation | PD |  |  | 1 | W | Tc=75°C | 1 |
| Forward Voltage | VF |  |  | 1.2 | V | IF = 200 mA | 1 |
| Junction Temperature Range | TJ | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | TS | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `1SMA4765A`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `1sma4765a-etched.step` / `1sma4765a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma4765a.step` / `1sma4765a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [TWGMC datasheet](docs/1sma4765a-datasheet.pdf) (4 pp, sha256 `a0e1e0c1e7da0b66`, 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/1sma4765a-datasheet.pdf)