# ST1045AX

**SMC Sangdest Microelectronicstronic Nanjing** · Schottky Diodes · R-6

ST1045AX from SMC Sangdest Microelectronicstronic Nanjing, in a R-6. 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 | SMC Sangdest Microelectronicstronic Nanjing |
| Package | R-6 |
| 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 |
|---|---|---|---|---|---|---|---|
| Peak Repetitive Reverse Voltage / Working Peak Reverse Voltage / DC Blocking Voltage | VRRM |  |  | 45 | V |  | 1 |
| Average Rectified Forward Current | IF (AV) |  |  | 10 | A | 50% duty cycle @TC= 75°C, rectangular wave form | 1 |
| Peak One Cycle Non-Repetitive Surge Current | IFSM |  |  | 150 | A | 8.3 ms, half Sine pulse, TC= 25°C | 1 |
| Forward Voltage Drop | VF1 |  | 0.49 | 0.56 | V | @ 10A, Pulse, TJ = 25 C; Pulse width < 300 µs, duty cycle < 2% | 1 |
| Forward Voltage Drop | VF2 |  | 0.41 | 0.5 | V | @ 10A, Pulse, TJ = 125 C; Pulse width < 300 µs, duty cycle < 2% | 1 |
| Reverse Current | IR1 |  | 0.017 | 1 | mA | @VR = rated VR, TJ = 25 C | 1 |
| Reverse Current | IR2 |  | 15 | 30 | mA | @VR = rated VR, TJ = 125 C | 1 |
| Junction Temperature | TJ | -55 |  | 150 | C |  | 2 |
| Storage Temperature | Tstg | -55 |  | 150 | C |  | 2 |
| Typical Thermal Resistance Junction to Ambient | RθJA |  | 75 |  | C/W | DC operation | 2 |

## CAD (KiCad official)

- Symbol: `ST1045AX`
- Footprint: `Diode_THT:D_P600_R-6_P20.00mm_Horizontal`
- 3D model: R-6 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [SMC Sangdest Microelectronicstronic Nanjing datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588891132641730560) (4 pp, sha256 `db7fdc61ba7053ab`, retrieved 2026-10-15, 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/st1045ax-datasheet.pdf)