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Diodes Incorporated B340AXS-13
- Part No.:
- B340AXS-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA Flat Leads
- Datasheet:
-
B340AXS-13.pdf
- Description:
- DIODE SCHOTTKY 40V 3A SMA-FS 10K
- Quantity:
- Payment:
- Shipping:
Inventory:3,734
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Product details
Overview
B340AXS-13 from Diodes Incorporated is a 40 V, 3 A trench Schottky barrier rectifier in SMA-FS package, optimized for low forward voltage (0.50 V max at 3 A, 25°C) and low leakage (200 µA max at 40 V, 25°C), used in DC-DC converters, freewheeling paths, and reverse polarity protection circuits.
For engineers reviewing the B340AXS-13 datasheet, B340AXS-13 pinout, B340AXS-13 application, or B340AXS-13 equivalent, this device delivers soft fast switching, high efficiency in compact power conversion stages, and RoHS-compliant lead-free plating with UL 94V-0 molding compound.
Technical Context
This Schottky rectifier uses trench-based silicon structure to reduce forward voltage drop while maintaining low reverse leakage across -55°C to +150°C operating range. Its 285 pF capacitance at 4 V reverse bias supports high-frequency operation in SMPS and DC-DC topologies.
Thermal resistance is specified as 55°C/W junction-to-case and 145°C/W junction-to-ambient on standard FR-4 PCB layout, enabling stable 3 A average current handling up to 100°C case temperature per derating curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage without breakdown |
| IO | 3 A - Continuous average forward current capability at 25°C ambient |
| VF (max) | 0.50 V - Forward voltage drop at 3 A, 25°C; enables <1.5 W conduction loss |
| IR (max) | 200 µA - Reverse leakage at 40 V, 25°C; ensures low standby power loss |
| CT | 285 pF - Junction capacitance at 4 V, 1 MHz; supports >1 MHz switching in buck converters |
| RθJA | 145 °C/W - Thermal resistance to ambient on standard FR-4 board; defines heatsinking requirement |
| IFSM | 65 A - Non-repetitive surge current rating for transient load handling |
Pinout & Package
Package: SMA-FS surface-mount plastic package with cathode band polarity indicator, 0.033 g weight, UL 94V-0 flammability rating, and matte tin lead finish compliant with MIL-STD-202 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to lower-potential side of circuit (e.g., switch node in buck converter) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; connects to output rail or ground return path for polarity protection |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky architecture | Reduces VF by ~15% vs. planar Schottky equivalents at same current density |
| Soft, fast switching | Minimizes EMI generation during diode turn-off in high-frequency converters |
| Low IR at elevated temperature | 3 mA max leakage at 40 V, 100°C - maintains efficiency in hot environments |
| Halogen- and antimony-free "Green" compound | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets global environmental compliance mandates |
Applications
| DC-DC Converter | Freewheeling Diode |
|---|---|
Use Scenario: Synchronous buck converter output stage with 5–12 V input, 3.3–5 V output, switching at 500 kHz–1 MHz. IC Role / Device Role: Freewheeling path for inductor current during high-side FET off-time. Use Value: 0.50 V VF minimizes conduction loss; 285 pF CT avoids resonance with output filter inductance. | Use Scenario: Inductive load drive (e.g., solenoid, relay coil) requiring energy recirculation. IC Role / Device Role: Provides low-loss return path for stored magnetic energy. Use Value: Soft recovery limits voltage overshoot; 65 A IFSM handles inductive kick without failure. |
| Reverse Polarity Protection | Blocking Diode |
Use Scenario: 12 V automotive accessory input with risk of battery cable reversal. IC Role / Device Role: Series-connected anode-in configuration blocks reverse current flow. Use Value: 200 µA IR at 25°C ensures <2.4 mW standby dissipation; 40 V VRRM covers load dump transients. | Use Scenario: OR-ing diode in dual-power-supply redundancy system (e.g., main + backup 5 V rails). IC Role / Device Role: Prevents backfeed between supplies while passing forward current. Use Value: Low VF reduces voltage drop across diode; 3 A IO supports typical embedded system loads. |
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, 3 A IO, but planar Schottky; VF = 0.55 V max at 3 A | Slightly higher conduction loss; less suitable for thermally constrained layouts | Select if cost sensitivity outweighs 50 mV VF advantage and thermal margin is ample |
| MBR340 (ON Semiconductor) | 40 V VRRM, 3 A IO, DO-214AC package; VF = 0.52 V max at 3 A; RθJA = 70°C/W | Larger footprint; better thermal performance but incompatible with SMA-FS board space | Select when board-level thermal management allows larger package and higher mounting reliability is required |
Compared with SS34 and MBR340, B340AXS-13 offers the lowest VF in SMA-FS form factor and best high-frequency capacitance profile, making it optimal for space-constrained, high-efficiency DC-DC designs where thermal resistance to ambient is managed via PCB copper area.
Availability
B340AXS-13 is available at Aetrix Electronics and suitable for DC-DC converters, freewheeling diode circuits, and reverse polarity protection applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for B340AXS-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-performance, high-reliability components for power management, signal integrity, and protection.
B340AXS belongs to Diodes' advanced trench Schottky rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in consumer, industrial, and automotive auxiliary systems.
FAQ
What is the maximum junction temperature for continuous operation?
The B340AXS-13 has an operating junction temperature range of -55°C to +150°C. Continuous operation at 150°C requires strict adherence to thermal design rules: junction-to-ambient thermal resistance must remain ≤145°C/W on specified FR-4 layout, and power dissipation must be limited to avoid exceeding 150°C under worst-case ambient and load conditions.
Is B340AXS-13 qualified for automotive applications?
No - B340AXS-13 is commercial-grade and not AEC-Q101 qualified. Diodes offers automotive-qualified variants (e.g., B340A-Q) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening; those parts carry explicit "-Q" suffix and separate qualification reports.
How does the SMA-FS package differ from standard SMA?
SMA-FS features a flattened shoulder and tighter dimensional tolerances (e.g., body height 1.10 mm max vs. 2.20 mm for SMA), enabling improved coplanarity and reflow yield on fine-pitch PCBs. It retains identical pinout and thermal interface but is optimized for automated assembly in high-density power modules.
Can B340AXS-13 replace a standard 1N5822 in existing designs?
Yes - with caveats: both are 3 A, 40 V Schottky rectifiers, but B340AXS-13 has lower VF (0.50 V vs. 0.55 V), smaller SMA-FS footprint (vs. DO-201AD), and higher CT (285 pF vs. ~220 pF). Layout redesign is required; verify EMI and thermal performance in final application due to package and capacitance differences.
B340AXS-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- 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:
- 285pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA-FS
- Operating Temperature - Junction:
- -55°C ~ 150°C
B340AXS-13 FAQ
1.How can I place an order for B340AXS-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B340AXS-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 B340AXS-13 reliable?
The price and inventory of B340AXS-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B340AXS-13 is usually 5 days.
3.What payment methods are accepted for B340AXS-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B340AXS-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B340AXS-13?
B340AXS-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B340AXS-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 B340AXS-13?
For technical support, including B340AXS-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B340AXS-13 requirements.
6.How does Aetrix verify that B340AXS-13 is sourced from the original manufacturer or authorized distributors?
All B340AXS-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 B340AXS-13 meets industry standards.
7.What is the process for return or replacement of B340AXS-13?
All B340AXS-13 units undergo pre-shipment inspection (PSI). If there is an issue with B340AXS-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 B340AXS-13 part is unused and in its original packaging.
Return procedure for B340AXS-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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