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Diodes Incorporated B140BQ-13-F
- Part No.:
- B140BQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B140BQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 40V 1A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:25,537
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Product details
Overview
B140BQ-13-F from Diodes Incorporated is a 1.0A, 40V peak repetitive reverse voltage surface-mount Schottky barrier rectifier in SMB package, with maximum forward voltage of 0.5V at 1.0A and reverse leakage current ≤0.5mA at 25°C. It delivers low power loss and high efficiency for polarity protection, freewheeling, and blocking functions in DC-DC converters and automotive power supplies.
For engineers reviewing the B140BQ-13-F datasheet, B140BQ-13-F pinout, B140BQ-13-F application, or B140BQ-13-F equivalent, this part supports AEC-Q101 qualified designs requiring low VF, fast switching (12ns trr), surge robustness (30A IFSM), and RoHS-compliant lead-free plating in SMB footprint.
Technical Context
This Schottky diode uses guard ring die construction to enhance transient immunity and suppress edge breakdown. Its low forward voltage drop and minimal reverse recovery time enable efficient operation in high-frequency switching topologies such as synchronous buck converters and flyback snubbers.
The device operates across –65°C to +150°C junction temperature range, with thermal resistance of 65°C/W when mounted on a 50mm×50mm×23mm aluminum heatsink. It exhibits 110pF total capacitance at 4V reverse bias and 1MHz, supporting stable performance in noise-sensitive signal path isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum non-repetitive reverse voltage before breakdown; sets safe operating limit for blocking applications. |
| IO (Avg) | 1.0 A - Continuous average forward current rating at TT = +130°C; defines steady-state power handling capability. |
| VF (Max) | 0.5 V @ 1.0A - Forward voltage drop limiting conduction loss and self-heating in low-voltage rails. |
| IR (Max) | 0.5 mA @ 40V, 25°C - Reverse leakage current determining off-state power waste and signal integrity in high-impedance circuits. |
| tRR | 12 ns - Reverse recovery time enabling use in >1 MHz switching converters without excessive ringing or EMI. |
| IFSM | 30 A - Non-repetitive surge current rating allowing tolerance of inrush or fault transients without failure. |
| RθJA (with heatsink) | 65 °C/W - Thermal resistance enabling 1.0A operation at ambient up to +85°C with defined heatsinking. |
Pinout & Package
Package: SMB (Surface Mount Body), molded plastic case per UL 94V-0, cathode indicated by band or notch, matte tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path) in blocking/freewheel configurations. |
| Cathode | Forward current exit point | Connected to higher-potential node (e.g., input rail or switch node); polarity marker enables correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown under transient overvoltage, improving reliability in noisy automotive environments. |
| AEC-Q101 qualification | Validated for automotive-grade temperature cycling, humidity, and mechanical stress per JEDEC standards. |
| Lead-free & halogen-free | RoHS 3 compliant (≤900ppm Br/Cl, ≤1000ppm Sb), meeting global environmental and assembly requirements. |
| Surge robustness | Withstands 30A single half-sine surge (8.3ms), supporting protection against load dump or inductive kick events. |
Applications
| Automotive Power Supply Protection | DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Reverse battery connection protection in 12V vehicle ECUs and infotainment modules. IC Role / Device Role / Timing Role: Polarity protection diode placed between battery input and downstream regulator. Use Value: Prevents damage during service misconnection while adding <0.5V dropout and negligible standby loss. |
Use Scenario: Freewheel path in 300kHz–1MHz synchronous buck converter powering microcontrollers. IC Role / Device Role / Timing Role: Low-VF recirculation path for inductor current during high-side FET off-time. Use Value: Reduces conduction loss vs. silicon diode, improving efficiency by ~2% at 1A output. |
| Industrial Sensor Interface Blocking | USB-C Power Path Isolation |
Use Scenario: Signal line blocking in 24V industrial IO-Link sensors to prevent backfeed into auxiliary supplies. IC Role / Device Role / Timing Role: Reverse-blocking diode isolating sensor VDD from shared bus supply. Use Value: Enables independent power domain control with <0.5mA leakage at full rated voltage. |
Use Scenario: VBUS path isolation in dual-role USB-C ports to prevent cross-port backfeeding. IC Role / Device Role / Timing Role: Directional blocking element in power delivery negotiation circuitry. Use Value: Supports 40V reverse blocking margin above 20V PD3.0 max, with fast turn-off minimizing cross-talk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB140-E3/52 (Vishay) | Same SMB package, 40V VRRM, but VF = 0.55V (max @ 1A); RθJA = 70°C/W (no heatsink spec). | Lacks AEC-Q101 qualification; not recommended for automotive production. | Select if cost sensitivity outweighs automotive compliance and thermal margin. |
| SS14 (ON Semiconductor) | SMB package, 40V VRRM, VF = 0.55V (max @ 1A); IR = 0.5mA (same), but no guard ring or PPAP capability. | Not AEC-Q101 qualified; limited traceability for Tier-1 OEM programs. | Acceptable for industrial consumer designs where qualification documentation is not required. |
Compared with SB140-E3/52 and SS14, B140BQ-13-F provides tighter VF control (0.5V max), verified AEC-Q101 compliance, and documented PPAP readiness-making it the preferred choice for automotive and mission-critical industrial power paths where reliability and supply chain assurance are mandatory.
Availability
B140BQ-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC-DC converters, and USB-C power delivery systems requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for B140BQ-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, specializing in high-reliability power management, signal integrity, and protection solutions.
B140BQ-13-F belongs to the B1X0Q/BQ Schottky rectifier product line, engineered for low-loss, high-frequency power conversion in automotive and industrial applications where efficiency, surge resilience, and qualification rigor are essential.
FAQ
What is the maximum junction temperature for continuous operation?
The B140BQ-13-F has an operating junction temperature range of –65°C to +150°C. For continuous 1.0A DC operation, thermal design must ensure TJ does not exceed +130°C, achievable with a 65°C/W heatsink at TA ≤ +85°C or using PCB copper area per Diodes' suggested pad layout for SMB.
Is B140BQ-13-F compatible with lead-free reflow profiles?
Yes. The device features matte tin-plated terminals and is qualified for standard Pb-free reflow soldering per J-STD-020, including peak temperatures up to 260°C. Moisture sensitivity level is rated at Level 1, eliminating bake requirements prior to assembly.
How does the guard ring construction improve reliability?
The guard ring die structure reduces electric field crowding at the semiconductor edge, preventing premature avalanche breakdown during voltage transients. This extends operational life under repeated load-dump or inductive-switching stress common in automotive 12V systems.
Can B140BQ-13-F replace B140Q-13-F in existing designs?
No. B140Q-13-F uses the smaller SMA package (RθJA = 115°C/W), while B140BQ-13-F uses SMB (RθJA = 65°C/W with heatsink). PCB footprints, thermal relief, and current derating curves differ; direct substitution requires layout and thermal validation.
B140BQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -65°C ~ 150°C
B140BQ-13-F FAQ
1.How can I place an order for B140BQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B140BQ-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 B140BQ-13-F reliable?
The price and inventory of B140BQ-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 B140BQ-13-F is usually 5 days.
3.What payment methods are accepted for B140BQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B140BQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B140BQ-13-F?
B140BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B140BQ-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 B140BQ-13-F?
For technical support, including B140BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B140BQ-13-F requirements.
6.How does Aetrix verify that B140BQ-13-F is sourced from the original manufacturer or authorized distributors?
All B140BQ-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 B140BQ-13-F meets industry standards.
7.What is the process for return or replacement of B140BQ-13-F?
All B140BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B140BQ-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 B140BQ-13-F part is unused and in its original packaging.
Return procedure for B140BQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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