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Diodes Incorporated B340B-13
- Part No.:
- B340B-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
B340B-13.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMB
- Quantity:
- Payment:
- Shipping:
Inventory:6,067
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Product details
Overview
B340B-13 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, 100 A non-repetitive surge rating, and 0.5 mA peak reverse current at 25°C - used for low-voltage DC/DC converter output rectification and polarity protection in industrial power supplies.
For engineers reviewing the B340B-13 datasheet, B340B-13 pinout, B340B-13 application, or B340B-13 equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance (10 °C/W junction-to-terminal), RMS reverse voltage (28 V), surge capability (100 A, 8.3 ms), and RoHS-compliant matte tin plating for lead-free assembly.
Technical Context
This Schottky rectifier employs guard ring die construction to enhance transient immunity and supports automatic placement via SMB footprint. Its low VF (0.50 V @ 3.0 A) and fast switching enable high-efficiency operation in 100 kHz–1 MHz DC/DC converters.
Thermal performance is defined by RJT = 10 °C/W (junction-to-terminal) with 5.0 mm² copper pad, and derating begins above 100°C terminal temperature. Capacitance is 250 pF at 1 MHz / 4 V reverse bias, supporting stable high-frequency behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; sets safe operating limit for input-side clamping or output-side blocking. |
| IO @ TT=100°C | 3.0 A - Continuous average forward current with thermal management; defines usable DC load capacity. |
| VFM @ IF=3.0A | 0.50 V - Forward voltage drop at full rated current; directly determines conduction loss (1.5 W typical). |
| IFSM (8.3ms) | 100 A - Non-repetitive surge rating; enables survival during cold-start inrush or fault transients. |
| RJT | 10 °C/W - Junction-to-terminal thermal resistance; guides heatsinking design when mounted on 5 mm² copper pad. |
| CT @ 1MHz/4V | 250 pF - Junction capacitance; impacts high-frequency switching noise and EMI filter sizing. |
| IRM @ 25°C | 0.5 mA - Peak reverse leakage at rated DC blocking voltage; critical for low-power standby efficiency. |
Pinout & Package
SMB (DO-214AA) surface-mount package: molded plastic case, UL 94V-0 rated, cathode band marking, matte tin-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter); requires low-inductance trace routing. |
| Cathode | Forward current exit / reverse-blocking terminal | Marked with band; ties to output rail or ground return; carries full load current and must handle thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves ESD and surge immunity without external TVS; validated per JEDEC transient test methods. |
| Low forward voltage (0.50 V @ 3.0 A) | Reduces conduction loss by ~30% vs. comparable Si diodes; enables higher efficiency in 3.3 V/5 V output rails. |
| 100 A surge rating (8.3 ms) | Withstands single-cycle inrush events in offline SMPS or battery-input systems without degradation. |
| RoHS-compliant matte tin plating | Ensures reliable solderability per MIL-STD-202 Method 208; compatible with lead-free reflow profiles. |
Applications
| DC/DC Converter Output Rectification | Polarity Protection Circuit |
|---|---|
Use Scenario: Secondary-side rectification in isolated or non-isolated buck/boost converters delivering 3.3 V or 5 V at up to 3 A. IC Role / Device Role / Timing Role: Unidirectional current path enabling synchronous or asynchronous rectification; replaces MOSFET+driver in cost-sensitive designs. Use Value: 0.50 V VF minimizes power loss (1.5 W max), improving system efficiency by ≥2% over standard PN diodes at 3 A. | Use Scenario: Reverse-voltage protection at power input of industrial controllers or IoT edge nodes powered by 12–24 V DC sources. IC Role / Device Role / Timing Role: Series-connected blocking element; conducts only during correct polarity insertion. Use Value: 40 V VRRM provides 2× margin over 24 V nominal supply; 0.5 mA IRM ensures negligible standby drain. |
| Free-Wheeling Diode | Low-Voltage Inverter Clamping |
Use Scenario: Flyback path for inductive loads (e.g., solenoids, relays, motor windings) in 24 V automotive body electronics. IC Role / Device Role / Timing Role: Provides low-loss recirculation path during switch-off; suppresses inductive kickback. Use Value: 100 A IFSM handles short-duration energy dumps; 10 °C/W RJT enables rapid heat transfer to PCB copper. | Use Scenario: Clamp diode in half-bridge inverters driving small AC motors or piezo actuators in medical pumps. IC Role / Device Role / Timing Role: Limits voltage overshoot across switching devices during commutation transitions. Use Value: 250 pF CT ensures minimal capacitive loading on gate drivers; 28 V VR(RMS) supports continuous 24 VAC-rated 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 RJT = 12 °C/W. | Slightly higher conduction loss and thermal resistance; suitable where 50 mV VF margin is acceptable. | Select SS34 if dual-sourcing required and 0.05 V higher VF is tolerable in thermal budget. |
| SB340 (ON Semiconductor) | Identical 40 V/3 A rating, but uses legacy SMB package with 0.52 V VF and no guard ring construction. | Lacks transient-hardened die; less robust in noisy industrial environments with frequent line surges. | Prefer B340B-13 where ESD immunity and surge resilience are design-critical, e.g., factory automation interfaces. |
Compared with SS34 and SB340, B340B-13 delivers the lowest forward voltage (0.50 V), best thermal resistance (10 °C/W), and integrated guard ring for transient hardening - making it optimal for high-efficiency, reliability-critical 3 A rectification tasks.
Availability
B340B-13 is available at Aetrix Electronics and suitable for industrial power supplies, battery-powered instrumentation, and embedded DC/DC converter modules requiring stable component supply and RoHS-compliant manufacturing.
Supply support for B340B-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, specializing in high-reliability power management and signal integrity solutions for industrial, computing, and consumer markets.
The B3xx series targets cost-sensitive, high-volume power conversion applications - optimized for low VF, robust surge handling, and automated assembly in SMB/SMA/SMC packages.
FAQ
What is the maximum junction temperature for continuous operation of B340B-13?
The B340B-13 has a specified operating junction temperature range of –55°C to +125°C. For continuous operation at full 3.0 A current, terminal temperature must be maintained at ≤100°C per the derating curve; exceeding this requires active cooling or current reduction to prevent thermal runaway.
Can B340B-13 replace a standard silicon rectifier like 1N5822 in a 5 V/2 A power supply?
Yes - B340B-13 offers lower forward voltage (0.50 V vs. ~0.9 V for 1N5822), reducing conduction loss by ~45%. Its SMB package matches 1N5822's DO-201AD footprint only with adapter layout; direct replacement requires verifying PCB pad dimensions and thermal relief design.
Is B340B-13 suitable for use in automotive infotainment power stages?
No - while AEC-Q200 qualified variants exist in the B3xx family, B340B-13 itself is not automotive-qualified. It lacks extended temperature validation beyond +125°C junction and has no PPAP documentation; use only in commercial/industrial environments unless explicitly certified.
Does the "B" suffix in B340B-13 indicate SMB package exclusively?
Yes - per Diodes Incorporated's ordering nomenclature, "B" suffix denotes SMB (DO-214AA) package; "A" indicates SMA (DO-214AC), and no suffix indicates SMC (DO-214AB). The -13 suffix specifies 3000-piece tape-and-reel packaging per industry standard.
B340B-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AA, SMB
- 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:
- SMB
- Operating Temperature - Junction:
- -55°C ~ 150°C
B340B-13 FAQ
1.How can I place an order for B340B-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B340B-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 B340B-13 reliable?
The price and inventory of B340B-13 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 is usually 5 days.
3.What payment methods are accepted for B340B-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340B-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340B-13?
B340B-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340B-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 B340B-13?
For technical support, including B340B-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340B-13 requirements.
6.How does Aetrix verify that B340B-13 is sourced from the original manufacturer or authorized distributors?
All B340B-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 B340B-13 meets industry standards.
7.What is the process for return or replacement of B340B-13?
All B340B-13 units undergo pre-shipment inspection (PSI). If there is an issue with B340B-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 B340B-13 part is unused and in its original packaging.
Return procedure for B340B-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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