# US1MH

**DIYI Elec Tech** · Diodes - Fast Recovery Rectifiers · SMA

US1MH from DIYI Elec Tech, 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 | 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 | DIYI Elec Tech |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum Recurrent Peak Reverse Voltage |  |  |  | 1000 | V |  | 1 |
| Maximum RMS Voltage | VRMS |  |  | 700 | V |  | 1 |
| Maximum DC Blocking Voltage | VDC |  |  | 1000 | V |  | 1 |
| Average Rectified Output Current | I(AV) |  |  | 1 | A |  | 1 |
| Forward Voltage | VFM |  |  | 1.7 | V | @IF=1.0A | 1 |
| Peak Reverse Current | IR |  |  | 5 | uA | At Rated DC Blocking Voltage | 1 |
| Peak Reverse Current | IR |  |  | 75 | uA | At Rated DC Blocking Voltage | 1 |
| Maximum Reverse Recovery Time | Trr |  |  | 50 | ns | IF=0.5A,IR=1.0A,IRR=0.25A | 1 |
| Rating for fusing | I t |  |  | 3.74 | A s 2 | t<8.3ms | 1 |
| TJ Operating and Storage Temperature Range | TJ, TSTG | -55 |  | 150 | ℃ |  | 1 |

## CAD (KiCad official)

- Symbol: `US1MH`
- Footprint: `Diode_SMD:D_SMA`
- 3D model: SMA (KiCad packages3D, STEP)
- 3D model files: `us1mh-etched.step` / `us1mh-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `us1mh.step` / `us1mh.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [DIYI Elec Tech datasheet](docs/us1mh-datasheet.pdf) (3 pp, sha256 `d94e86ff76f27366`, retrieved 2026-10-21, 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/us1mh-datasheet.pdf)