# JSPG540A

**Jiangsu JieJie Microelectronics** · Schottky Diodes · SMB

JSPG540A from Jiangsu JieJie Microelectronics, in a SMB. 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 terminal, marked by the color band on the SMB package; 40V VRRM and 5.0A average forward current rating. |
| 2 | A | passive | Anode terminal of the Schottky rectifier, with forward voltage of 0.55V max at IF=5A. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu JieJie Microelectronics |
| Package | SMB |
| 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 repetitive peak reverse voltage | VRRM |  |  | 40 | V |  | 1 |
| Maximum RMS voltage | VRMS |  |  | 28 | V |  | 1 |
| Maximum DC blocking voltage | VDC |  |  | 40 | V |  | 1 |
| Maximum average forward current | IF(AV) |  |  | 5 | A |  | 1 |
| Peak forward surge current | IFSM |  |  | 120 | A | 8.3ms single half sine-wave superimposed on rated load | 1 |
| Operating junction temperature range | Tj | -55 |  | 125 | ℃ |  | 1 |
| Storage temperature range | Tstg | -55 |  | 150 | ℃ |  | 1 |
| Forward voltage | VF |  |  | 0.55 | V | IF=5A | 1 |
| Reverse current at rated DC blocking voltage | IR |  |  | 0.1 | mA | TA=25℃ | 1 |
| Reverse current at rated DC blocking voltage | IR |  |  | 15 | mA | TA=100℃ | 1 |
| Junction capacitance | CJ |  |  | 350 | pF | VR=4.0V, f=1MHz | 1 |
| Thermal resistance from junction to ambient | Rth(j-a) |  |  | 55 | ℃/W | 0.375"(9.5mm) lead length, P.C.B mounted | 2 |

## CAD (KiCad official)

- Symbol: `JSPG540A`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: SMB (KiCad packages3D, STEP)
- 3D model files: `jspg540a-etched.step` / `jspg540a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `jspg540a.step` / `jspg540a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Jiangsu JieJie Microelectronics datasheet](docs/jspg540a-datasheet.pdf) (4 pp, sha256 `d8f8c63c915fa019`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/jspg540a-datasheet.pdf)