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Diodes Incorporated B340B-13-F
- Part No.:
- B340B-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B340B-13-F.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:191,380
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Product details
Overview
B340B-13-F from Diodes Incorporated is a 40 V, 3.0 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.50 V forward voltage at 3.0 A and 0.5 mA reverse leakage at rated VR, optimized for low-voltage DC/DC conversion and polarity protection in automotive power modules.
For engineers reviewing the B340B-13-F datasheet, B340B-13-F pinout, B340B-13-F application, or B340B-13-F equivalent, key selection criteria include its 40 V blocking rating, 100 A non-repetitive surge capability, AEC-Q101 qualification, RoHS/Green compliance, and thermal resistance of 25 °C/W (junction-to-terminal).
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient robustness and suppress avalanche-induced failure during load dump events. Its low VF and fast recovery enable high-efficiency operation in 100–500 kHz switching converters without snubbers.
Designed for surface-mount assembly on FR-4 PCBs with 2×3 mm copper pads, it delivers 3.0 A average forward current at terminal temperature ≤100 °C and supports full-rated conduction up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24 V automotive systems. |
| IO @ TT=100°C | 3.0 A - Continuous DC output current achievable with proper PCB copper area and ambient cooling. |
| VF @ IF=3.0A | 0.50 V - Low conduction loss enabling >92% efficiency in 5–12 V buck converters at full load. |
| IR @ VR=40V, TA=25°C | 0.5 mA - Minimal reverse leakage preserves battery standby life in always-on vehicle modules. |
| IFSM (8.3 ms) | 100 A - Withstands motor stall surges and alternator load dump transients without failure. |
| RθJT | 25 °C/W - Junction-to-terminal thermal resistance confirms direct heat transfer path to PCB copper pad. |
| Package | SMB - Standard surface-mount outline (5.0–5.59 mm length) compatible with automated pick-and-place. |
Pinout & Package
Two-terminal device in SMB package: anode and cathode marked by molded cathode band on top surface; terminals are matte tin-plated for lead-free soldering per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current entry point | Connected to unregulated input rail (e.g., battery+, converter primary side); accepts forward bias. |
| Cathode | Output current exit point | Connected to regulated output or ground return; polarity band identifies this terminal visually. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Prevents edge breakdown under voltage transients, improving reliability in automotive load-dump conditions. |
| AEC-Q101 qualified | Validated for automotive-grade temperature cycling, humidity, and mechanical shock per stress test requirements. |
| Lead-free & halogen-free | Meets EU RoHS 2 and JESD201A Class 2 standards; <900 ppm Br, <900 ppm Cl, <1000 ppm Sb. |
| 125 A peak surge rating | Exceeds standard 100 A IFSM spec-enables use in high-inertia motor drive freewheeling paths. |
Applications
| Automotive Body Control Module | Industrial DC/DC Converter |
|---|---|
Use Scenario: Reverse polarity protection on 12 V supply input to BCM microcontroller and CAN transceiver circuitry. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage from incorrect battery connection. Use Value: 0.50 V VF minimizes voltage drop across protection diode, preserving 11.5 V minimum for MCU operation. |
Use Scenario: Output rectification in 48 V to 5 V isolated flyback converter for industrial sensor node power. IC Role / Device Role / Timing Role: High-frequency synchronous rectifier replacement with zero recovery delay. Use Value: 200 pF capacitance and fast switching reduce EMI generation at 300 kHz switching frequency. |
| USB-C Power Delivery Adapter | LED Lighting Driver |
Use Scenario: Input polarity protection and hold-up rectification in 20 V USB-PD front-end stage. IC Role / Device Role / Timing Role: Freewheeling path during MOSFET dead-time and reverse-blocking element. Use Value: 100 A surge rating withstands inrush from large input capacitors during hot-plug events. |
Use Scenario: Secondary-side rectification in constant-current LED driver for streetlight applications. IC Role / Device Role / Timing Role: Low-loss DC output rectifier minimizing thermal rise in enclosed fixture. Use Value: RθJT = 25 °C/W enables 3.0 A conduction with <40 °C temperature rise on 2×3 mm copper pad. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB340-E3/54 (Vishay) | Same 40 V VRRM, 3.0 A IO, but VF = 0.52 V @ 3.0 A; SMB package, no AEC-Q101 qualification. | Lacks automotive stress validation; suitable for commercial-industrial only. | Select when AEC-Q101 is not required and cost sensitivity outweighs qualification needs. |
| SS34 (ON Semiconductor) | 40 V VRRM, 3.0 A IO, VF = 0.55 V @ 3.0 A; SMB package; AEC-Q101 qualified but IR = 1.0 mA @ 40 V. | Higher leakage reduces battery retention time in always-on modules. | Prefer where tighter leakage control is critical and slightly higher VF is acceptable. |
Compared with SB340-E3/54 and SS34, B340B-13-F offers the lowest VF (0.50 V), lowest IR (0.5 mA), and full AEC-Q101 qualification-making it optimal for thermally constrained, safety-critical automotive power rails.
Availability
B340B-13-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial DC/DC converters, and USB-C power delivery adapters requiring stable component supply and long-term lifecycle support.
Supply support for B340B-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.
B340B-13-F belongs to the B3xxB Schottky rectifier product line, engineered specifically for high-reliability 12–48 V power conversion in automotive and industrial environments where low VF, surge tolerance, and AEC-Q101 compliance are mandatory.
FAQ
Is B340B-13-F suitable for automotive applications?
Yes. It is AEC-Q101 qualified and PPAP capable, with operating temperature range of –55 °C to +150 °C, guard ring die construction for transient immunity, and full RoHS/halogen-free compliance-meeting Tier-1 automotive power system requirements.
What is the maximum PCB copper pad size recommended for thermal performance?
The datasheet specifies thermal resistance RθJT = 25 °C/W when mounted on a 2×3 mm copper pad on glass-epoxy PCB. Increasing pad area beyond this yields diminishing returns; thermal vias beneath the cathode pad further reduce RθJA.
Does B340B-13-F have a specified junction-to-case thermal resistance?
No-only RθJT (junction-to-terminal) = 25 °C/W and RθJA (junction-to-ambient) = 95 °C/W are specified. RθJT reflects conduction through the solder joint into the PCB copper, not a traditional case interface.
Can B340B-13-F replace B340BQ-13-F in non-automotive designs?
Yes. Electrically and thermally identical per Diodes Incorporated documentation; B340BQ-13-F adds automotive-specific documentation and PPAP support, while B340B-13-F meets all same electrical specs and is fully RoHS/Green compliant.
B340B-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
B340B-13-F FAQ
1.How can I place an order for B340B-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for B340B-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 B340B-13-F reliable?
The price and inventory of B340B-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 B340B-13-F is usually 5 days.
3.What payment methods are accepted for B340B-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340B-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340B-13-F?
B340B-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340B-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 B340B-13-F?
For technical support, including B340B-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340B-13-F requirements.
6.How does Aetrix verify that B340B-13-F is sourced from the original manufacturer or authorized distributors?
All B340B-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 B340B-13-F meets industry standards.
7.What is the process for return or replacement of B340B-13-F?
All B340B-13-F units undergo pre-shipment inspection (PSI). If there is an issue with B340B-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 B340B-13-F part is unused and in its original packaging.
Return procedure for B340B-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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