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Diodes Incorporated BAS40WQ-13-F
- Part No.:
- BAS40WQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
BAS40WQ-13-F.pdf
- Description:
- DIODE SCHOT 40V 200MA SOT323 10K
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
BAS40WQ-13-F from Diodes Incorporated is a 200mA, 40V peak repetitive reverse voltage Schottky barrier diode in SOT323 package, featuring 1V max forward voltage at 40mA, 200nA max leakage at 30V, and 5ns reverse recovery time. It serves as a high-speed rectifier or clamping diode in automotive power management, USB port protection, and low-voltage DC-DC converter output stages.
For engineers reviewing the BAS40WQ-13-F datasheet, BAS40WQ-13-F pinout, BAS40WQ-13-F application, or BAS40WQ-13-F equivalent, key selection criteria include its AEC-Q101 qualification, ultra-low VF for efficiency-critical 3.3V/5V rails, SOT323 footprint compatibility with space-constrained PCBs, and PN junction guard ring for ESD robustness in automotive infotainment and body control modules.
Technical Context
This Schottky diode uses a metal-semiconductor junction to achieve fast switching (trr ≤ 5ns) and low conduction loss (VF ≤ 1V @ 40mA), enabling efficient high-frequency rectification in buck converter freewheeling paths and reverse polarity protection circuits. Its 40V VRRM rating supports 24V automotive systems with margin.
The integrated PN junction guard ring provides transient suppression and ESD protection up to ±8kV HBM, while the SOT323 package delivers 330°C/W thermal resistance and operates from –55°C to +125°C - meeting IATF16949 production requirements for under-hood electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Supports 24V automotive supply rails with 67% safety margin against load dump transients |
| IF(AV) | 200 mA - Rated continuous forward current for sustained operation in low-power signal path clamping |
| VF Max | 1000 mV @ 40mA - Minimizes conduction loss in 3.3V logic-level power paths |
| IR Max | 200 nA @ 30V - Ensures negligible leakage in battery-backed circuits and always-on monitoring nodes |
| trr | 5 ns - Enables stable operation in >10MHz switching converters without tail current issues |
| CT | 5.0 pF @ 0V - Reduces capacitive loading on high-speed data lines like USB D+/D– |
| TJ Range | –55°C to +125°C - Validated for engine compartment and ADAS sensor module environments |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic package (2.0 × 2.225 × 0.9 mm), moisture sensitivity level 1, lead-free matte tin finish over Alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward current entry point | Connected to higher-potential node (e.g., input rail or switch node) in reverse polarity protection or freewheeling configurations |
| Cathode (Pin 2) | Forward current exit / reverse blocking terminal | Connected to load or ground; withstands up to 40V reverse bias during off-state in clamp or OR-ing applications |
| Case / Exposed Pad (Pin 3) | Thermal and mechanical anchor | Not electrically connected; provides mechanical stability and aids heat dissipation via PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| PN junction guard ring | Provides built-in ESD protection (±8kV HBM) and transient immunity without external TVS components |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per JESD47 |
| SOT323 footprint | Enables <1.5 mm² board area usage - suitable for compact camera modules and smart actuator PCBs |
| Lead-free & halogen-free | Complies with RoHS 3 (2015/863/EU) and automotive "Green" standards (<900 ppm Br/Cl, <1000 ppm Sb) |
Applications
| Automotive USB Port Protection | Low-Voltage DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Protecting USB 2.0 ports in vehicle infotainment head units from reverse connection and ESD events. IC Role / Device Role / Timing Role: Reverse polarity protection diode placed between VBUS and downstream power switch. Use Value: 1V VF minimizes voltage drop across protection path; guard ring eliminates need for discrete ESD array, reducing BOM count by one component. | Use Scenario: Freewheeling path in 3.3V synchronous buck converter powering MCU core logic. IC Role / Device Role / Timing Role: High-speed catch diode during high-side FET off-time to maintain current continuity. Use Value: 5ns trr prevents shoot-through risk and reduces switching losses at 2MHz operation; 200mA rating matches typical SoC core rail current profiles. |
| Reverse Polarity Input Protection | Signal Line Clamping in CAN Transceiver Interfaces |
Use Scenario: Preventing damage from incorrect battery connection in 12V telematics control units. IC Role / Device Role / Timing Role: Series-connected Schottky diode in main power input path before LDO regulator. Use Value: 40V VRRM accommodates 12V system transients (e.g., ISO 7637-2 pulse 5a); 200nA IR avoids battery drain in parked state. | Use Scenario: Clamping transient spikes on CAN_H/CAN_L lines in gateway ECUs exposed to load dump. IC Role / Device Role / Timing Role: Bidirectional clamping diode pair (anode-to-rail, cathode-to-rail) protecting transceiver I/O pins. Use Value: Low CT (5pF) avoids signal integrity degradation on 1Mbps CAN bus; guard ring ensures robustness against ESD coupling through harness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBAT54AWT1G | Same SOT323 package, 30V VRRM, 200mA IF, but VF = 1.25V @ 40mA (higher loss) | Limited to 12V systems; unsuitable for 24V load dump margin | Select when cost sensitivity outweighs 40V margin requirement and thermal budget allows +250mV VF penalty |
| NSR0230P2T5G | 30V VRRM, 200mA IF, VF = 0.45V @ 10mA (lower loss at light load), but no AEC-Q101 qualification | Not approved for automotive production; requires additional qualification effort | Prefer for industrial or consumer designs where automotive certification is unnecessary and ultra-low VF at microamp bias is critical |
Compared with SBAT54AWT1G and NSR0230P2T5G, the BAS40WQ-13-F uniquely combines 40V rating, AEC-Q101 compliance, and 5ns trr - making it the only drop-in solution for 24V automotive power rails requiring zero additional qualification or derating.
Availability
BAS40WQ-13-F is available at Aetrix Electronics and suitable for automotive infotainment systems, telematics control units, and ADAS camera modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for BAS40WQ-13-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The BAS40WQ belongs to Diodes' automotive-qualified Schottky diode product line, engineered specifically for high-reliability 12V/24V vehicle subsystems where low VF, fast switching, and ESD-hardened construction are mandatory.
FAQ
Is BAS40WQ-13-F qualified for automotive use?
Yes. The BAS40WQ-13-F is AEC-Q101 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and ESD validation per JESD22-A114, making it suitable for engine control, body electronics, and infotainment applications.
What is the maximum allowable junction temperature?
The absolute maximum junction temperature is +125°C, with derated power dissipation beginning at +25°C ambient. At +85°C ambient, maximum continuous power drops to 165mW (50% of 330mW rating), based on the published derating curve in DS42229 Rev. 3–2.
Does BAS40WQ-13-F require a heatsink on standard FR4 PCB?
No. With RθJA = 330°C/W and PD = 330mW, the junction-to-ambient rise is 109°C at full load - acceptable within the +125°C TJ limit when ambient stays below +16°C. For typical automotive ambient conditions (≤+85°C), no external heatsink is needed if using recommended pad layout per Diodes' SOT323 outline.
Can BAS40WQ-13-F replace BAS40-03W in existing designs?
Yes, with verification. Both share SOT323 package and identical pinout, but BAS40WQ-13-F adds AEC-Q101 qualification, guard ring ESD protection, and tighter IR spec (200nA vs. 500nA). Layout compatibility is confirmed; requalification is required only for automotive production release.
BAS40WQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 200mA
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 40 mA
- Speed:
- Small Signal =< 200mA (Io), Any Speed
- Reverse Recovery Time (trr):
- 5 ns
- Current - Reverse Leakage @ Vr:
- 200 nA @ 30 V
- Capacitance @ Vr, F:
- 5pF @ 0V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-323
- Operating Temperature - Junction:
- -55°C ~ 125°C
BAS40WQ-13-F FAQ
1.How can I place an order for BAS40WQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for BAS40WQ-13-F on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BAS40WQ-13-F reliable?
The price and inventory of BAS40WQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BAS40WQ-13-F is usually 5 days.
3.What payment methods are accepted for BAS40WQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BAS40WQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BAS40WQ-13-F?
BAS40WQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BAS40WQ-13-F order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BAS40WQ-13-F?
For technical support, including BAS40WQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BAS40WQ-13-F requirements.
6.How does Aetrix verify that BAS40WQ-13-F is sourced from the original manufacturer or authorized distributors?
All BAS40WQ-13-F products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BAS40WQ-13-F meets industry standards.
7.What is the process for return or replacement of BAS40WQ-13-F?
All BAS40WQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with BAS40WQ-13-F, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BAS40WQ-13-F part is unused and in its original packaging.
Return procedure for BAS40WQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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