# S1M

**onsemi** · Diodes - General Purpose · SMA(DO-214AC)

S1M from onsemi, 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 terminal of the S1M rectifier, shown as pin 1 on the SMA marking diagram; the device is rated for a maximum repetitive reverse voltage (VRRM) of 1000 V and 1.0 A average rectified forward current at TA = 100°C. |
| 2 | Anode | passive | Anode terminal of the S1M rectifier, shown as pin 2 on the SMA marking diagram; the device is rated for a 30 A non-repetitive peak forward surge current (8.3 ms half-sine) and a 1.1 V maximum forward voltage at 1.0 A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | SMA(DO-214AC) |
| Category | Diodes |
| Pins | 2 |

## CAD (KiCad official)

- Symbol: `S1M`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA(DO-214AC) (KiCad packages3D, STEP)
- 3D model files: `s1m-etched.step` / `s1m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `s1m.step` / `s1m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/s1m-d.pdf) (5 pp, sha256 `6f970a96456b118b`, retrieved 2026-10-12, tier: manufacturer)
- **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/s1m-datasheet.pdf)