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BAS40W-04
Public Made by Adomby adom
MSKSEMI Schottky Diodes, SOT-323. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownBAS40W-04
MSKSEMI · Schottky Diodes · SOT-323
BAS40W-04 from MSKSEMI, in a SOT-323. 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 | A1 | passive | Anode of the first Schottky diode in the BAS40W-04 series pair (marking 44); pin 1 of SOT-323, 40 V VRRM and 200 mA forward continuous current per datasheet ratings. |
| 2 | K2 | passive | Cathode of the second Schottky diode in the BAS40W-04 series pair; pin 2 of SOT-323, 40 V reverse voltage and 200 mA forward continuous current per datasheet ratings. |
| 3 | K1/A2 | passive | Common node joining the cathode of the first diode and the anode of the second diode in the BAS40W-04 series configuration; pin 3 of SOT-323. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | MSKSEMI |
| Package | SOT-323 |
| Category | Diodes |
| Pins | 3 |
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 peak reverse voltage | VRRM | 40 | V | Maximum Ratings @Ta=25℃ | 2 | ||
| Working peak reverse voltage | VRWM | 40 | V | Maximum Ratings @Ta=25℃ | 2 | ||
| DC blocking voltage | VR | 40 | V | Maximum Ratings @Ta=25℃ | 2 | ||
| Forward continuous current | IFM | 200 | mA | Maximum Ratings @Ta=25℃ | 2 | ||
| Power dissipation | PD | 150 | mW | Maximum Ratings @Ta=25℃ | 2 | ||
| Thermal resistance junction to ambient | RθJA | 667 | ℃/W | 2 | |||
| Operating Junction Temperature Range | TJ | -40 | 125 | ℃ | 2 | ||
| Storage Temperature Range | TSTG | -55 | 150 | ℃ | 2 | ||
| Reverse breakdown voltage | V(BR) | 40 | V | IR= 10μA | 2 | ||
| Reverse voltage leakage current | IR | 200 | nA | VR=30V | 2 | ||
| Forward voltage | VF | 380 | mV | IF=1mA | 2 | ||
| Forward voltage | VF | 1000 | mV | IF=40mA | 2 | ||
| Diode capacitance | CD | 5 | pF | VR=0,f=1MHz | 2 | ||
| Reverse recovery time | trr | 5 | ns | Irr=1mA, IR=IF=10mA, RL=100Ω | 2 |
CAD (KiCad official)
- Symbol:
BAS40W-04 - Footprint:
Package_TO_SOT_SMD:SOT-323_SC-70 - 3D model: SOT-323 (KiCad packages3D, STEP)
- 3D model files:
bas40w-04-etched.step/bas40w-04-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bas40w-04.step/bas40w-04.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: MSKSEMI datasheet (5 pp, sha256
58c39d118b28550e, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).