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Diodes Incorporated B340BQ-13-F
- Part No.:
- B340BQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B340BQ-13-F.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,529
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Product details
Overview
B340BQ-13-F from Diodes Incorporated is a 40 V, 3.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.5 V max forward voltage at 3.0 A, 0.5 mA max reverse leakage at rated voltage, and AEC-Q101 qualification for automotive use. It serves as a low-loss polarity protection or freewheeling diode in DC/DC converters and power supply rails.
For engineers reviewing the B340BQ-13-F datasheet, B340BQ-13-F pinout, B340BQ-13-F application, or B340BQ-13-F equivalent, key selection criteria include its 40 V reverse voltage rating, thermal resistance (RθJA = 95 °C/W), surge capability (100 A IFSM), RoHS/Green compliance, and SMB footprint compatibility with automated assembly.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and supports high-frequency switching up to several MHz due to low junction capacitance (200 pF at 4 V). Its low VF enables reduced conduction loss in low-voltage (<12 V) power paths.
Designed for operation from –55 °C to +150 °C, it maintains stable leakage current (<0.5 mA at 25 °C, <20 mA at 100 °C) and delivers 3.0 A average forward current when case temperature is held at 100 °C per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for DC blocking in 24 V systems. |
| IO (AV) | 3.0 A @ TT = +100 °C - Sustained DC output current capability under thermal-limited conditions. |
| VF Max | 0.50 V @ IF = 3.0 A - Low conduction loss enabling >92% efficiency in 5 V–12 V buck converter outputs. |
| IR Max | 0.5 mA @ VR = 40 V, TA = +25 °C - Minimal standby power drain in always-on polarity protection circuits. |
| IFSM | 100 A @ 8.3 ms half-sine - Withstands inrush surges in motor drive freewheeling and hot-swap applications. |
| RθJA | 95 °C/W - Junction-to-ambient thermal resistance on standard FR-4 PCB; defines heatsinking requirement for 3 A continuous load. |
| CT | 200 pF @ VR = 4 V, f = 1 MHz - Low capacitance preserves switching speed in high-frequency (>100 kHz) SMPS designs. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic body with matte tin-plated terminals and cathode band marking. Dimensions: 3.94 mm × 5.59 mm × 2.21 mm (L × W × H); weight ≈ 0.093 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/power source side in rectification or freewheeling path. |
| Cathode | Forward current exit point; marked with band | Connected to load/ground side; polarity must be observed to prevent reverse conduction failure. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and transient robustness without external TVS, supporting IEC 61000-4-2 Level 3 (±8 kV contact). |
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control modules and body electronics. |
| Lead-free & Halogen-free | Meets RoHS 3 (2015/863/EU) and "Green" definition: Br+Cl <1500 ppm, Sb <1000 ppm. |
| SMB package with J-STD-020 Level 1 MSL | Enables standard reflow soldering without baking; compatible with high-volume SMT lines. |
Applications
| Power Supply Polarity Protection | DC Motor Freewheeling |
|---|---|
Use Scenario: Prevents damage from reverse battery connection in 12 V automotive ECUs and industrial controllers. IC Role / Device Role / Timing Role: Unidirectional current gate placed between input connector and main regulator IC. Use Value: 0.5 V VF minimizes voltage drop and heat generation during normal operation; 100 A IFSM handles accidental short-circuit transients. | Use Scenario: Suppresses inductive kickback in brushed DC motor drivers used in HVAC actuators and seat adjusters. IC Role / Device Role / Timing Role: Freewheeling path across motor coil during PWM off-time. Use Value: Fast recovery (no minority carrier storage) eliminates tail current, reducing MOSFET switching loss and EMI. |
| Low-Voltage DC/DC Output Rectification | USB-C Power Delivery Clamp |
Use Scenario: Secondary-side rectification in 5 V/3.3 V synchronous-buck-derived supplies for microcontrollers and sensors. IC Role / Device Role / Timing Role: Output rectifier replacing synchronous MOSFET where cost or layout simplicity is prioritized. Use Value: 200 pF CT and low VF maintain efficiency above 90% at 1–2 MHz switching frequencies. | Use Scenario: Reverse-polarity clamp on USB-C VBUS line in portable docking stations and power banks. IC Role / Device Role / Timing Role: Fail-safe shunt path that activates only during miswiring events. Use Value: 0.5 mA IR at 20 V ensures negligible quiescent current draw during normal 5–20 V operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS34 (Vishay) | Same SMB package, 40 V VRRM, but VF = 0.55 V @ 3 A and IR = 0.5 mA - slightly higher conduction loss. | Not AEC-Q101 qualified; limited to commercial-grade consumer power supplies. | Select SS34 only if automotive qualification is not required and cost is primary driver. |
| SB340 (ON Semiconductor) | Identical electrical specs (40 V, 3 A, 0.5 V VF), but RθJA = 100 °C/W - 5% higher thermal resistance than B340BQ-13-F. | Qualified to AEC-Q101 but lacks PPAP capability and IATF 16949 manufacturing certification. | Choose SB340 only for non-PPAP automotive prototypes; B340BQ-13-F preferred for production release. |
Compared with SS34 and SB340, B340BQ-13-F delivers superior thermal performance (RθJA = 95 °C/W), full PPAP support, and guaranteed IATF 16949 traceability-critical for Tier-1 automotive suppliers requiring audit-ready documentation and supply continuity.
Availability
B340BQ-13-F is available at Aetrix Electronics and suitable for automotive ECUs, industrial power supplies, and USB-C accessory designs requiring stable component supply, AEC-Q101 compliance, and RoHS/Green certification.
Supply support for B340BQ-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 B340BQ-13-F belongs to Diodes' high-reliability Schottky rectifier product line, engineered specifically for automotive and industrial power conversion where low VF, surge robustness, and process-controlled qualification are mandatory.
FAQ
What is the maximum junction temperature for continuous operation?
The B340BQ-13-F has an operating junction temperature range of –55 °C to +150 °C. For continuous 3.0 A DC operation, the case temperature must be maintained at ≤100 °C per the forward current derating curve. Exceeding this requires thermal design mitigation such as copper pour or forced airflow.
Is the SMB package lead-free and compatible with standard reflow profiles?
Yes. The B340BQ-13-F uses matte tin-plated terminals and complies with J-STD-020 Level 1 moisture sensitivity. It supports standard Pb-free reflow profiles (peak 260 °C, 10–30 sec above 217 °C) without pre-baking or special handling.
Does this part support bidirectional current flow?
No. As a Schottky barrier rectifier, the B340BQ-13-F conducts only from anode to cathode. Reverse conduction is blocked up to 40 V; attempting bidirectional use will result in catastrophic failure under reverse bias exceeding VRRM.
How does the guard ring construction improve reliability?
The guard ring die structure reduces electric field crowding at the silicon edge, raising the effective breakdown voltage margin and improving immunity to ESD (≥8 kV contact per IEC 61000-4-2) and fast transients-critical in automotive environments with load dump and jump-start events.
B340BQ-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):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Capacitance @ Vr, F:
- 200pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
- Operating Temperature - Junction:
- -55°C ~ 150°C
B340BQ-13-F FAQ
1.How can I place an order for B340BQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B340BQ-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 B340BQ-13-F reliable?
The price and inventory of B340BQ-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 B340BQ-13-F is usually 5 days.
3.What payment methods are accepted for B340BQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340BQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340BQ-13-F?
B340BQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340BQ-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 B340BQ-13-F?
For technical support, including B340BQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340BQ-13-F requirements.
6.How does Aetrix verify that B340BQ-13-F is sourced from the original manufacturer or authorized distributors?
All B340BQ-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 B340BQ-13-F meets industry standards.
7.What is the process for return or replacement of B340BQ-13-F?
All B340BQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B340BQ-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 B340BQ-13-F part is unused and in its original packaging.
Return procedure for B340BQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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