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BAS40-04Q
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Yangzhou Yangjie Elec Tech Schottky Diodes, SOT-23(TO-236). 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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Contents
README
markdownBAS40-04Q
Yangzhou Yangjie Elec Tech · Schottky Diodes · SOT-23(TO-236)
BAS40-04Q from Yangzhou Yangjie Elec Tech, in a SOT-23(TO-236). 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 (marking 44, BAS40-04Q dual series configuration); 40V VRRM, 120mA IFAV per the datasheet. |
| 2 | K2 | passive | Cathode of the second Schottky diode in the BAS40-04Q series pair; 40V VRRM, 120mA IFAV per the datasheet. |
| 3 | K1/A2 | passive | Common node joining the cathode of the first diode and the anode of the second diode in the BAS40-04Q series configuration. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Yangzhou Yangjie Elec Tech |
| Package | SOT-23(TO-236) |
| 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 Reverse Voltage | VRRM | 40 | V | 1 | |||
| Average Forward Current | IFAV | 120 | mA | 1 | |||
| Non-repetitive Peak Forward Surge Current | IFSM | 0.6 | A | square wave tp<10ms | 1 | ||
| Power Dissipation | PD | 200 | mW | 1 | |||
| Thermal Resistance Junction to Ambient | RthJA | 500 | ℃/W | Junction to Ambient | 1 | ||
| Junction Temperature | Tj | -55 | 150 | ℃ | 1 | ||
| Storage Temperature Range | Tstg | -55 | 150 | ℃ | 1 | ||
| Reverse Breakdown Voltage | V(BR)R | 40 | V | IR=10uA | 2 | ||
| Forward Voltage | VF | 0.38 | V | IF=1.0mA | 2 | ||
| Forward Voltage | VF | 1 | V | IF=40mA | 2 | ||
| Reverse Current | IR | 0.2 | μA | VR=30V | 2 | ||
| Junction Capacitance | CJ | 5 | pF | VR=0 V, f=1MHZ | 2 | ||
| Reverse Recovery Time | trr | 5 | ns | IF=IR=5mA,Irr=0.5mA,RL=100Ω | 2 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | black | 4. Body color: Black | 3 | |
| contacts | tin | ● Terminals: Tin plated leads, solderable per J-STD-002 and JESD22-B102 | 1 |
CAD (KiCad official)
- Symbol:
BAS40-04Q - Footprint:
Package_TO_SOT_SMD:SOT-23 - 3D model: SOT-23(TO-236) (KiCad packages3D, STEP)
- 3D model files:
bas40-04q-etched.step/bas40-04q-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);bas40-04q.step/bas40-04q.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Yangzhou Yangjie Elec Tech datasheet (4 pp, sha256
0d43fbeee6ea1172, retrieved 2026-10-15, 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).