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Diodes Incorporated B340-13
- Part No.:
- B340-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B340-13.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:6,577
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Product details
Overview
B340-13 from Diodes Incorporated is a 40 V, 3.0 A surface-mount Schottky barrier rectifier in SMC package, featuring 0.50 V max forward voltage at 3.0 A and 0.1 mA max reverse leakage at rated VR, optimized for low-voltage, high-frequency freewheeling and polarity protection in DC power rails.
For engineers reviewing the B340-13 datasheet, B340-13 pinout, B340-13 application, or B340-13 equivalent, key selection criteria include its 40 V reverse blocking rating, 100 A non-repetitive surge capability, 20 °C/W junction-to-terminal thermal resistance, RoHS-compliant lead-free plating, and JEDEC-qualified reliability for commercial and industrial power conversion designs.
Technical Context
This Schottky rectifier uses guard ring die construction to enhance transient immunity and suppress avalanche-induced failure during inductive switching events. Its low VF and fast recovery enable efficient energy recycling in buck converters and reverse-polarity protection circuits without minority-carrier storage delay.
Designed for automated SMT assembly, it operates across –55 °C to +150 °C with 90 °C/W junction-to-ambient thermal resistance on standard FR-4 PCBs. The cathode-banded SMC package supports 3.0 A continuous current under derated conditions and withstands 125 A peak surge per JEDEC test standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for DC bus or flyback clamp voltage handling. |
| IO (AV) | 3.0 A - Continuous average forward current at TA = +25°C; defines steady-state power dissipation capability in rectification paths. |
| VF (max) | 0.50 V @ 3.0 A - Forward voltage drop determining conduction loss and thermal load in high-current DC/DC stages. |
| IR (max) | 0.1 mA @ 40 V, +25°C - Reverse leakage current affecting standby power and voltage hold-up in battery-backed systems. |
| IFSM | 100 A @ 8.3 ms - Non-repetitive surge rating enabling robustness against inrush and inductive kick events. |
| RθJT | 20 °C/W - Junction-to-terminal thermal resistance; enables direct heatsink mounting via terminal pad for improved thermal management. |
| Package | SMC - Surface-mount case with 6.6–7.11 mm width and 5.59–6.22 mm length; compatible with IPC-7351B SMC footprint. |
Pinout & Package
SMC package with two terminals: anode and cathode. Cathode identified by molded band on body. Terminals are matte tin-plated for solderability per MIL-STD-202, Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to input/source side of rectification path; must sustain full IO and IFSM under fault conditions. |
| Cathode | Forward current exit / reverse blocking node | Marked with band; connects to output/load side; reverse voltage appears across this terminal during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown and improves ESD/transient tolerance without external TVS components. |
| Low VF (0.50 V max) | Reduces conduction loss by ~30% vs. comparable silicon diodes, lowering thermal stress in compact power supplies. |
| 100 A IFSM rating | Supports reliable operation during motor startup surges and capacitor charging transients in industrial controls. |
| JEDEC-qualified reliability | Meets AEC-Q stress test requirements for extended lifetime in commercial-grade embedded power modules. |
| Halogen- and antimony-free "Green" compound | Complies with IEC 61249-2-21; <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance mandates. |
Applications
| DC Power Polarity Protection | DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Preventing damage from reversed input connections in 12 V/24 V industrial power inputs. IC Role / Device Role / Timing Role: Unidirectional current gate placed upstream of LDOs or DC/DC controllers. Use Value: Eliminates need for series MOSFET or fuse-based protection while maintaining <0.5 V dropout at full load. |
Use Scenario: Energy recirculation path in synchronous buck converter output stage during low-side switch off-time. IC Role / Device Role / Timing Role: Fast-recovery freewheeling diode parallel to low-side MOSFET. Use Value: Enables >92% efficiency at 3 A output with minimal reverse recovery loss and no minority-carrier tail current. |
| Low-Voltage Inverter Output Stage | USB-C Power Delivery Clamp |
Use Scenario: Output rectification in 5–12 V isolated flyback inverters for LED drivers and sensor interfaces. IC Role / Device Role / Timing Role: Secondary-side synchronous rectification replacement where gate drive complexity is prohibitive. Use Value: Delivers stable 40 V blocking margin above 12 V nominal output, with <200 pF capacitance minimizing EMI at 100 kHz–1 MHz switching. |
Use Scenario: Reverse-voltage clamp on VBUS lines in USB-C PD sink applications with dual-input redundancy. IC Role / Device Role / Timing Role: Standby protection diode preventing backfeed between alternate power sources. Use Value: 0.1 mA IR at 20 V ensures <2 µW standby leakage, preserving battery life in portable PD accessories. |
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 40 V VRRM and 3 A IO, but VF = 0.55 V max @ 3 A; RθJA = 100 °C/W vs. 90 °C/W. | Limited to lower ambient temperature environments due to higher thermal resistance. | Prefer B340-13 where board space allows larger copper pads or where >125°C junction operation is required. |
| MBR340 (ON Semiconductor) | Identical VRRM, IO, VF spec; uses DO-214AB package (SMC equivalent) but with 25 °C/W RθJT vs. 20 °C/W. | Slightly reduced thermal headroom in high-power-density layouts with constrained heatsinking. | Choose B340-13 when optimizing for minimum junction temperature rise under sustained 3 A load. |
Compared with SS34 and MBR340, the B340-13 delivers superior thermal performance (20 °C/W RθJT), tighter VF control (0.50 V max), and JEDEC-qualified reliability-making it preferred for thermally constrained, high-volume commercial power modules requiring long-term stability.
Availability
B340-13 is available at Aetrix Electronics and suitable for DC power polarity protection, DC-DC converter freewheeling, and low-voltage inverter output stages requiring stable component supply and RoHS-compliant manufacturing.
Supply support for B340-13 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 centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The B320–B360 series targets cost-sensitive, high-volume commercial power applications requiring robust Schottky rectification with automotive-grade reliability validation and green material compliance.
FAQ
Is B340-13 suitable for automotive applications?
No-B340-13 is qualified for commercial-grade reliability per JEDEC standards, not AEC-Q200. For automotive use, Diodes offers the pin-compatible B340Q-13 variant, which undergoes additional temperature cycling, humidity testing, and vibration qualification per AEC-Q200 Rev D.
What is the maximum PCB copper area needed for full 3.0 A operation at +70°C ambient?
To sustain 3.0 A continuously at +70°C ambient, the SMC footprint requires ≥200 mm² total copper area (anode + cathode pads combined) on 1 oz. FR-4, per Diodes' thermal model in DS30923 Rev. 13, Fig. 6. Smaller areas require current derating.
Does B340-13 have a specified reverse recovery time (trr)?
No-Schottky barrier rectifiers like B340-13 exhibit majority-carrier conduction and do not specify trr. Their turn-off is effectively instantaneous (<1 ns), eliminating reverse recovery charge (Qrr) and associated switching losses present in PN-junction diodes.
Can B340-13 replace B330-13 in an existing design?
Yes-B340-13 has identical package, pinout, and thermal characteristics as B330-13, with higher VRRM (40 V vs. 30 V). It can be used as a drop-in upgrade where increased reverse voltage margin is needed, provided layout and thermal design accommodate the same 3.0 A rating.
B340-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AB, SMC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 125°C
B340-13 FAQ
1.How can I place an order for B340-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B340-13 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 B340-13 reliable?
The price and inventory of B340-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B340-13 is usually 5 days.
3.What payment methods are accepted for B340-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340-13?
B340-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340-13 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 B340-13?
For technical support, including B340-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340-13 requirements.
6.How does Aetrix verify that B340-13 is sourced from the original manufacturer or authorized distributors?
All B340-13 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 B340-13 meets industry standards.
7.What is the process for return or replacement of B340-13?
All B340-13 units undergo pre-shipment inspection (PSI). If there is an issue with B340-13, 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 B340-13 part is unused and in its original packaging.
Return procedure for B340-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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