# 1SS400SMFHT2R

**ROHM Semicon** · Switching Diodes · SOD-523

1SS400SMFHT2R from ROHM Semicon, in a SOD-523. 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 | K | passive | Cathode: the banded/marked end per the datasheet; pad 1 of the KiCad diode footprint. |
| 2 | A | passive | Anode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | ROHM Semicon |
| Package | SOD-523 |
| 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 |
|---|---|---|---|---|---|---|---|
| Reverse voltage | VR |  |  | 80 | V |  | 1 |
| Repetitive peak reverse voltage | VRM |  |  | 90 | V |  | 1 |
| Average rectified forward current | Io |  |  | 100 | mA |  | 1 |
| Forward current | IFM |  |  | 225 | mA |  | 1 |
| Peak forward surge current | IFSM |  |  | 500 | mA | t=1s | 1 |
| Junction temperature | Tj |  |  | 150 | ℃ |  | 1 |
| Storage temperature | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Forward voltage | VF |  |  | 1.2 | V | IF=100mA | 1 |
| Reverse current | IR |  |  | 100 | nA | VR=80V | 1 |
| Capacitance between terminals | Ct |  |  | 3 | pF | VR=0.5V f=1.0MHz | 1 |
| Reverse recovery time | trr |  |  | 4 | ns | VR=6.0V IF=10mARL=100Ω | 1 |

## CAD (KiCad official)

- Symbol: `1SS400SMFHT2R`
- Footprint: `Diode_SMD:D_SOD-523`
- 3D model: SOD-523 (KiCad packages3D, STEP)
- 3D model files: `1ss400smfht2r-etched.step` / `1ss400smfht2r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `1ss400smfht2r.step` / `1ss400smfht2r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [ROHM Semicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589838161917337600) (7 pp, sha256 `b96041ac9c4988cb`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins`, primary `cathode-band convention` (convention), consensus `off` (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/1ss400smfht2r-datasheet.pdf)