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Diodes Incorporated B340AE-13
- Part No.:
- B340AE-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B340AE-13.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:104,001
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Product details
Overview
B340AE-13 from Diodes Incorporated is a 40 V, 3 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.5 V max forward voltage at 3 A and 0.20 mA max reverse leakage at 40 V and +25°C; optimized for boost, blocking, and recirculating diode roles in DC-DC converters and power supplies.
For engineers reviewing the B340AE-13 datasheet, B340AE-13 pinout, B340AE-13 application, or B340AE-13 equivalent, key selection criteria include its low VF for efficiency, high-temperature IR stability, SMA thermal resistance (RθJA = 60°C/W), and RoHS-compliant green molding compound.
Technical Context
This Schottky rectifier uses a planar epitaxial construction with platinum-silicide or similar low-barrier metal-semiconductor junction to achieve low forward voltage and fast switching without minority-carrier storage delay. Its 40 V VRRM rating targets 24 V and 36 V input rail applications where margin against transient overvoltage is required.
Thermal design relies on the SMA package's 30°C/W junction-to-case resistance and 60°C/W junction-to-ambient rating on standard FR-4 PCBs; derating begins above +75°C ambient per Figure 4, with full 3 A current supported only up to +75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit for 24 V bus systems with 16 V transients. |
| IO | 3 A - Continuous average forward current at TA = +25°C; requires thermal management above +75°C ambient. |
| VF (max) | 0.50 V @ 3 A, +25°C - Directly reduces conduction loss to ≤1.5 W at full load, improving converter efficiency. |
| IR (max) | 0.20 mA @ 40 V, +25°C - Low leakage preserves efficiency in standby mode and prevents thermal runaway at elevated temperatures. |
| RθJA | 60°C/W - Junction-to-ambient thermal resistance on 1"×1", 2 oz copper FR-4; defines minimum pad area needed for thermal compliance. |
| CT | 140 pF @ 4 V, 1 MHz - Junction capacitance impacts high-frequency switching noise and EMI filter design in SMPS. |
Pinout & Package
SMA (DO-214AC) surface-mount package: molded green plastic case (UL 94V-0), cathode band marking, matte tin–annealed copper leadframe, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in boost, ground in blocking configuration). |
| Cathode | Forward current exit / reverse-blocking terminal | Marked by band; connects to output rail or higher-potential node; sustains 40 V reverse bias. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF at 3 A | 0.50 V max enables ≤1.5 W conduction loss, reducing heatsink requirements in compact 3 A power stages. |
| High-temp IR stability | 0.20 mA max at +25°C and stable performance up to +150°C junction temperature prevents thermal runaway in sealed enclosures. |
| RoHS & Green compliant | Lead-free, halogen-free (<900 ppm Br/Cl, <1000 ppm Sb), UL 94V-0 rated - meets automotive and industrial environmental mandates. |
| SMA mechanical robustness | 0.063 g weight, J-STD-020 Level 1 moisture sensitivity, and MIL-STD-202 solderability support automated reflow assembly. |
Applications
| Boost Diode | Blocking Diode |
|---|---|
Use Scenario: Used in non-isolated boost converters to transfer energy from input to output during switch-off phase. IC Role / Device Role / Timing Role: Unidirectional current path enabling inductor energy transfer; conducts only when MOSFET is off. Use Value: 0.5 V VF minimizes power loss during high-duty-cycle operation, directly improving conversion efficiency by ~1.5% at 3 A. | Use Scenario: Placed between battery and system rail to prevent backfeed during battery swap or fault conditions. IC Role / Device Role / Timing Role: Reverse-polarity and back-power protection element; blocks current flow when battery is disconnected or reversed. Use Value: 40 V VRRM provides margin against load-dump transients in 24 V automotive systems, ensuring reliable isolation. |
| Recirculating Diode | DC-DC Output Rectifier |
Use Scenario: Provides freewheeling path for inductive loads (e.g., solenoids, relays) in motor drivers and PLC outputs. IC Role / Device Role / Timing Role: Clamps inductive kickback voltage and recirculates stored energy to ground during turn-off. Use Value: Fast recovery (inherent to Schottky) eliminates reverse recovery charge, preventing voltage spikes >60 V in 24 V systems. | Use Scenario: Secondary-side rectifier in 5–12 V isolated DC-DC modules for industrial I/O and sensor interfaces. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC output; operates continuously under full load. Use Value: 3 A IO rating supports 5 V/3 A or 12 V/2.5 A outputs with minimal thermal rise on standard PCB layouts. |
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 SMA package, 40 V VRRM, 3 A IO, but VF = 0.55 V max at 3 A and IR = 0.5 mA max - higher conduction loss and leakage. | Less suitable for thermally constrained 24 V systems operating above +85°C ambient due to higher IR drift. | Select B340AE-13 where low-temperature coefficient of leakage and tighter VF spec are critical. |
| MBR340 (ON Semiconductor) | Same ratings (40 V/3 A), but TO-277 package (lower RθJA ≈ 45°C/W); VF = 0.52 V max - slightly higher conduction loss. | Better thermal performance in high-power density designs, but requires different footprint and reflow profile. | Choose MBR340 only if board layout allows TO-277 and thermal budget demands sub-50°C/W RθJA. |
Compared with SS34 and MBR340, B340AE-13 delivers the lowest combined VF/IR trade-off in SMA format, making it optimal for space-constrained 24 V power rails where thermal runaway risk and efficiency are prioritized over package flexibility.
Availability
B340AE-13 is available at Aetrix Electronics and suitable for boost diode, blocking diode, and recirculating diode applications requiring stable component supply in industrial power supplies, automotive body electronics, and programmable logic controllers.
Supply support for B340AE-13 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 the Americas.
The B340AE-13 belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-sensitive, high-volume power conversion applications demanding reliability, low VF, and high-temperature stability.
FAQ
What is the maximum junction temperature for continuous operation of B340AE-13?
The B340AE-13 has an absolute maximum junction temperature of +150°C. Continuous operation at this limit requires strict thermal design: RθJA must be ≤20°C/W, achievable only with large copper planes or heatsinking. At rated 3 A load and +25°C ambient, typical TJ is ~115°C using standard FR-4 layout.
Does B340AE-13 meet AEC-Q101 requirements for automotive use?
No - B340AE-13 is not AEC-Q101 qualified. It is designed for industrial and commercial applications. For automotive-grade Schottky rectifiers, Diodes offers the B340AERQ series, which undergoes stress testing per AEC-Q101 and is manufactured in IATF 16949-certified facilities.
Can B340AE-13 replace B320AE-13 in a 20 V circuit?
Yes - B340AE-13 is backward compatible in 20 V circuits: its 40 V VRRM exceeds the 20 V requirement, and all other parameters (IO, VF, IR) match or exceed B320AE-13 specifications. No layout or thermal redesign is needed, though cost may be slightly higher.
What is the recommended PCB pad layout for SMA package reliability?
Diodes specifies a 0.56" × 0.73" (14.2 mm × 18.5 mm) copper pad for optimal thermal performance. The pad must be solid (no thermal relief), connected to internal ground/power planes via ≥4 thermal vias (0.3 mm diameter, 0.8 mm pitch), and conform to IPC-7351B SMA footprint standards to ensure coplanarity and solder joint integrity.
B340AE-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- 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:
- 200 µA @ 40 V
- Capacitance @ Vr, F:
- 140pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
B340AE-13 FAQ
1.How can I place an order for B340AE-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B340AE-13 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 B340AE-13 reliable?
The price and inventory of B340AE-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B340AE-13 is usually 5 days.
3.What payment methods are accepted for B340AE-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340AE-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340AE-13?
B340AE-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340AE-13 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 B340AE-13?
For technical support, including B340AE-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340AE-13 requirements.
6.How does Aetrix verify that B340AE-13 is sourced from the original manufacturer or authorized distributors?
All B340AE-13 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 B340AE-13 meets industry standards.
7.What is the process for return or replacement of B340AE-13?
All B340AE-13 units undergo pre-shipment inspection (PSI). If there is an issue with B340AE-13, 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 B340AE-13 part is unused and in its original packaging.
Return procedure for B340AE-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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