# BAS40LS-QYL

**Nexperia** · Schottky Barrier Diodes (SBD) · SOD-882

BAS40LS-QYL from Nexperia, in a SOD-882. 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 of the Schottky diode, indicated by the marking bar on the package; reverse voltage VR is rated at 40 V maximum (Table 1 and Table 5). |
| 2 | A | passive | Anode of the Schottky diode; forward current IF is rated at 120 mA maximum (Table 1 and Table 5). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Nexperia |
| Package | SOD-882 |
| 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 |  |  | 40 | V |  | 3 |
| Forward current | IF |  |  | 120 | mA |  | 3 |
| Repetitive peak forward current | IFRM |  |  | 120 | mA | tp ≤ 1 s; δ ≤ 0.5 | 3 |
| Non-repetitive peak forward current | IFSM |  |  | 200 | mA | tp ≤ 10 ms; Tj(init) = 25 °C prior to surge | 3 |
| Junction temperature | Tj |  |  | 150 | °C |  | 3 |
| Ambient temperature | Tamb | -55 |  | 150 | °C |  | 3 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 3 |
| Thermal resistance from junction to ambient | Rth(j-a) |  |  | 360 | K/W | in free air; device mounted on FR4 PCB, 70 µm single-sided copper, standard footprint | 3 |
| Forward voltage | VF |  |  | 380 | mV | IF = 1 mA; tp ≤ 300 µs; δ ≤ 0.02; pulsed; Tamb = 25 °C | 4 |
| Forward voltage | VF |  |  | 500 | mV | IF = 10 mA; tp ≤ 300 µs; δ ≤ 0.02; pulsed; Tamb = 25 °C | 4 |
| Forward voltage | VF |  |  | 1 | V | IF = 40 mA; tp ≤ 300 µs; δ ≤ 0.02; pulsed; Tamb = 25 °C | 4 |
| Reverse current | IR |  |  | 1 | µA | VR = 30 V; Tamb = 25 °C | 4 |
| Reverse current | IR |  |  | 10 | µA | VR = 40 V; Tamb = 25 °C | 4 |
| Diode capacitance | Cd |  |  | 5 | pF | VR = 0 V; f = 1 MHz; Tamb = 25 °C | 4 |

## CAD (KiCad official)

- Symbol: `BAS40LS-QYL`
- Footprint: `Diode_SMD:D_SOD-882`
- 3D model: SOD-882 (KiCad packages3D, STEP)
- 3D model files: `bas40ls-qyl-etched.step` / `bas40ls-qyl-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `bas40ls-qyl.step` / `bas40ls-qyl.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Nexperia datasheet](https://assets.nexperia.com/documents/data-sheet/BAS40LS-QYL.pdf) (10 pp, sha256 `1a8fdcd572770dae`, retrieved 2026-10-30, 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/bas40ls-qyl-datasheet.pdf)