# 1SMA5956B

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

1SMA5956B from YFW, 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 | Cathode | passive | Cathode terminal of the zener diode, marked as pin 1 in the DO-214AC/SMA pinning diagram; the datasheet gives no pin-specific electrical limits beyond the device ratings (PD 1.5 W, Tj -55 to +150 °C). |
| 2 | Anode | passive | Anode terminal of the zener diode, marked as pin 2 in the DO-214AC/SMA pinning diagram; the datasheet gives no pin-specific electrical limits beyond the device ratings (PD 1.5 W, Tj -55 to +150 °C). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| 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 |
|---|---|---|---|---|---|---|---|
| Power Dissipation | PD |  |  | 1.5 | W | TL=75°C | 1 |
| Junction Temperature Range | Tj | -55 |  | 150 | °C |  | 1 |
| Storage Temperature Range | Ts | -55 |  | 150 | °C |  | 1 |
| Zener voltage tolerance (suffix B) |  | -5 |  | 5 | % | Suffix B indicates ±5% tolerance | 2 |

## CAD (KiCad official)

- Symbol: `1SMA5956B`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: DO-214AC(SMA) (KiCad packages3D, STEP)
- 3D model files: `1sma5956b-etched.step` / `1sma5956b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1sma5956b.step` / `1sma5956b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](docs/1sma5956b-datasheet.pdf) (3 pp, sha256 `f0e7523067927399`, retrieved 2026-10-30, 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/1sma5956b-datasheet.pdf)