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Diodes Incorporated B340BE-13
- Part No.:
- B340BE-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B340BE-13.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:5,004
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Product details
Overview
B340BE-13 from Diodes Incorporated is a 40 V, 3 A surface-mount Schottky barrier rectifier in SMB package, featuring 0.5 V max forward voltage at 3 A and 0.20 mA max reverse leakage at 40 V/25°C, optimized for high-efficiency DC/DC converters and power supply output rectification.
For engineers reviewing the B340BE-13 datasheet, B340BE-13 pinout, B340BE-13 application, or B340BE-13 equivalent, key selection criteria include low VF for thermal efficiency, stable high-temperature IR performance, SMB footprint compatibility, and RoHS-compliant matte tin terminations.
Technical Context
This Schottky rectifier uses a planar epitaxial construction to achieve low forward voltage drop and controlled junction capacitance (140 pF at 4 V), enabling fast switching with minimal recovery loss in high-frequency power conversion stages.
Its thermal resistance of 90°C/W (junction-to-ambient, SMB) and 50°C/W (junction-to-case) supports operation up to +150°C ambient, with reverse leakage tightly specified at 0.20 mA @ 40 V/25°C and derated to ≤30 mA @ 45 V/125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in boost or flyback secondary circuits. |
| IO(AV) | 3 A - Average forward current rating; supports continuous conduction mode in 12–24 V output supplies. |
| VF(max) | 0.50 V @ 3 A, 25°C - Low conduction loss enables >92% efficiency in 5–12 V buck-derived outputs. |
| IR(max) | 0.20 mA @ 40 V, 25°C - Tight leakage spec ensures stability in high-temp industrial environments. |
| RθJA | 90 °C/W - Thermal resistance on FR-4 PCB; requires ≥25 mm² copper pad for full 3 A rating at 70°C ambient. |
| CT | 140 pF @ 4 V, 1 MHz - Junction capacitance limits EMI in >100 kHz switchers; lower than comparable PN diodes. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded, matte tin-plated copper leadframe, UL 94V-0 molded plastic body, 3.3–3.94 mm width × 4.06–4.57 mm length × 1.96–2.21 mm height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to input/source side; accepts up to 80 A non-repetitive surge (8.3 ms half-sine). |
| Cathode | Forward current exit / reverse blocking terminal | Marked by band; ties to output/load ground or return path; withstands 40 V reverse bias continuously. |
Key Features
| Feature | Design Value |
|---|---|
| Low VF Schottky architecture | 0.50 V max @ 3 A reduces conduction loss by ~40% vs. standard PN rectifiers, lowering thermal stress. |
| High-temperature IR stability | 0.20 mA max @ 25°C and ≤30 mA @ 125°C prevents thermal runaway in enclosed power modules. |
| RoHS-compliant matte tin finish | Lead-free, halogen-free, antimony-free plating ensures solderability per MIL-STD-202 and long-term reliability. |
| SMB footprint compatibility | Standardized 3.3×4.3 mm pad layout (per Diodes Inc. doc DS38600) enables drop-in replacement in existing layouts. |
Applications
| Boost Diode | Blocking Diode |
|---|---|
Use Scenario: Used in 12 V → 24 V boost converter output stage to prevent backflow during MOSFET off-time. IC Role / Device Role / Timing Role: Unidirectional current valve; conducts only when inductor voltage exceeds output rail. Use Value: 0.5 V VF minimizes voltage headroom loss, preserving regulation margin under 3 A load. | Use Scenario: Isolates battery from solar charge controller during nighttime or low-light conditions. IC Role / Device Role / Timing Role: Reverse-polarity protection element; blocks reverse current while allowing forward charging. Use Value: 0.20 mA IR at 25°C ensures <1 µA night-time drain, extending battery standby life. |
| Recirculating Diode | DC/DC Output Rectifier |
Use Scenario: Freewheeling path for inductive load current in automotive solenoid drivers (e.g., fuel injectors). IC Role / Device Role / Timing Role: Energy recapture path; clamps inductive kickback to safe voltage during switch turn-off. Use Value: 80 A IFSM rating handles transient surges without degradation, supporting 12 V/10 ms pulse loads. | Use Scenario: Secondary-side rectifier in isolated 5 V/3 A flyback power supply for industrial PLC I/O modules. IC Role / Device Role / Timing Role: Synchronous rectification alternative where gate drive complexity is prohibitive. Use Value: 140 pF CT and fast recovery eliminate ringing, reducing EMI filter component count. |
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 max @ 3 A; IR = 0.5 mA @ 40 V. | Higher leakage may reduce efficiency in thermally constrained enclosures above 85°C. | Prefer B340BE-13 where low IR is critical; SS34 acceptable for cost-sensitive consumer designs. |
| SB340 (ON Semiconductor) | Identical 40 V/3 A rating, VF = 0.52 V max, IR = 0.3 mA @ 40 V; slightly higher RθJA (95°C/W). | Marginally higher thermal resistance requires larger copper area for same current derating. | Choose B340BE-13 for tighter IR control and better thermal performance on standard FR-4. |
Compared with SS34 and SB340, B340BE-13 delivers the lowest specified reverse leakage (0.20 mA) and best thermal resistance (90°C/W), making it optimal for high-reliability industrial power supplies operating near thermal limits.
Availability
B340BE-13 is available at Aetrix Electronics and suitable for boost diode, blocking diode, recirculating diode, and DC/DC output rectifier applications requiring stable component supply across automotive, industrial control, and embedded power systems.
Supply support for B340BE-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, serving industrial, computing, communications, and consumer markets since 1959.
The B3xxBE series belongs to Diodes' general-purpose Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in space-constrained surface-mount designs.
FAQ
What is the maximum junction temperature for B340BE-13?
The absolute maximum junction temperature is +150°C, with continuous operation rated from –55°C to +150°C ambient. Derating begins at +70°C ambient per Figure 4 in DS38600, where IO drops linearly to zero at +150°C on standard FR-4 board.
Is B340BE-13 suitable for synchronous rectification?
No - B340BE-13 is a passive Schottky rectifier, not a synchronous rectifier IC or MOSFET driver. It functions as a unidirectional conduction device only; synchronous rectification requires active gate-controlled MOSFETs with timing control circuitry.
Does B340BE-13 have a qualified AEC-Q101 rating for automotive use?
No - B340BE-13 is not AEC-Q101 qualified. While its –55°C to +150°C operating range meets automotive ambient requirements, Diodes Incorporated does not list this part in its AEC-Q101 qualified portfolio; use B340BQ-13 for automotive-grade variants.
What is the recommended PCB pad layout for SMB package?
Per DS38600 Rev. 2–2 page 5, the SMB pad layout requires C = 4.30 mm, G = 1.80 mm, X = 2.50 mm, X1 = 6.80 mm, and Y = 2.30 mm. Use 2 oz copper with thermal relief vias under the cathode pad to manage 90°C/W RθJA effectively.
B340BE-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- SMB
- Operating Temperature - Junction:
- -55°C ~ 150°C
B340BE-13 FAQ
1.How can I place an order for B340BE-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B340BE-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 B340BE-13 reliable?
The price and inventory of B340BE-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B340BE-13 is usually 5 days.
3.What payment methods are accepted for B340BE-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340BE-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340BE-13?
B340BE-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340BE-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 B340BE-13?
For technical support, including B340BE-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340BE-13 requirements.
6.How does Aetrix verify that B340BE-13 is sourced from the original manufacturer or authorized distributors?
All B340BE-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 B340BE-13 meets industry standards.
7.What is the process for return or replacement of B340BE-13?
All B340BE-13 units undergo pre-shipment inspection (PSI). If there is an issue with B340BE-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 B340BE-13 part is unused and in its original packaging.
Return procedure for B340BE-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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