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Diodes Incorporated B350A-13
- Part No.:
- B350A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B350A-13.pdf
- Description:
- DIODE SCHOTTKY 50V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:6,729
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Product details
Overview
B350A-13 from Diodes Incorporated is a 3.0A, 50V surface-mount Schottky barrier rectifier in SMA package, featuring 0.70V typical forward voltage at +125°C and ≤0.5mA reverse leakage at rated VRRM, optimized for DC-DC converters and polarity protection circuits in automotive and industrial power supplies.
For engineers reviewing the B350A-13 datasheet, B350A-13 pinout, B350A-13 application, or B350A-13 equivalent, key selection criteria include peak repetitive reverse voltage (50V), average rectified output current (3.0A), thermal resistance (137°C/W), junction temperature range (–55°C to +150°C), and RoHS-compliant lead-free plating.
Technical Context
The B350A-13 employs guard ring die construction for transient protection and uses low-leakage Schottky junction technology to minimize conduction loss in high-frequency switching topologies. Its 50V VRRM rating supports mid-voltage rail applications while maintaining fast recovery characteristics without minority-carrier storage delay.
Designed for automated SMT assembly, it delivers stable forward voltage performance across –55°C to +150°C operating range and exhibits 200pF total capacitance at 4V reverse bias and 1MHz, enabling efficient operation in 100kHz–1MHz DC-DC stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - blocks up to 50V reverse voltage without breakdown in continuous operation |
| IO | 3.0 A - delivers 3A average rectified current at TT = +100°C with standard PCB layout |
| VF (typ) | 0.70 V @ +125°C - enables low conduction loss in thermally stressed environments |
| IR (max) | 0.5 mA @ 50V - ensures minimal standby power loss in battery-backed or energy-sensitive systems |
| RθJA | 137 °C/W - defines thermal derating slope on glass-epoxy substrate with 2×3mm copper pad |
| CT | 200 pF @ 4V, 1MHz - limits high-frequency displacement current in switching node snubbing |
| IFSM | 80 A - withstands single half-sine surge (8.3ms) during input fault or hot-plug events |
Pinout & Package
Package: SMA (Surface Mount Adapter), molded plastic case with UL 94V-0 flammability rating, cathode band polarity marking, and matte-tin lead-free plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path |
| Cathode | Forward current exit point | Marked with band; ties to higher-potential rail (e.g., output capacitor positive or supply input) |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances ESD and surge immunity without external TVS, reducing board-level protection component count |
| Low forward voltage (0.70V typ @ +125°C) | Reduces conduction loss by ~15% vs. silicon diodes at same current, improving converter efficiency at elevated temperatures |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test conditions |
| Halogen- and antimony-free "Green" compound | Meets <900ppm Br, <900ppm Cl, <1000ppm Sb thresholds, supporting EU environmental compliance and end-of-life recycling |
Applications
| Automotive DC-DC Converters | Industrial Polarity Protection |
|---|---|
Use Scenario: Step-down conversion from 12V/24V battery rails to 3.3V/5V logic supplies in engine control units and body electronics. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous or asynchronous buck converters, handling reverse recovery during high-side FET turn-off. Use Value: 0.70V VF at +125°C reduces power dissipation by 0.4W vs. 1.1V silicon diode at 3A, lowering thermal load on compact under-hood PCBs. | Use Scenario: Reverse-voltage protection for 24V PLC I/O modules and sensor interfaces exposed to field wiring errors. IC Role / Device Role / Timing Role: Series-connected anode-to-input rectifier that blocks reverse current when supply leads are swapped. Use Value: 0.5mA IR at 50V ensures <12.5µW standby loss, preserving system sleep current budget in always-on monitoring circuits. |
| High-Frequency Inverters | Low-Voltage Freewheeling |
Use Scenario: Output rectification in 100–500kHz resonant inverters for LED drivers and small AC adapters. IC Role / Device Role / Timing Role: Fast-recovery output diode conducting during transformer secondary half-cycles with minimal stored charge. Use Value: Absence of minority-carrier tail current eliminates need for snubber networks, simplifying EMI filter design and reducing component count. | Use Scenario: Inductor flyback path in 5V/3.3V point-of-load regulators powering FPGAs and microcontrollers. IC Role / Device Role / Timing Role: Low-loss freewheeling element conducting during low-side switch off-time in buck topology. Use Value: 200pF CT minimizes capacitive coupling into sensitive analog or clock domains, preserving signal integrity near mixed-signal ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS35-E3/57T (Vishay) | Same 50V VRRM, 3A IO, but 0.55V VF max @ 3A, 25°C; higher 1.0mA IR @ 50V | Lower VF improves efficiency at room temperature, but higher leakage may impact high-temp standby performance | Select for ambient-temperature-dominant designs where conduction loss outweighs leakage concerns |
| SB350-E3/57T (Vishay) | Identical 50V/3A rating, 0.72V VF typ @ 125°C, but not AEC-Q101 qualified | Lacks automotive qualification; suitable for industrial/commercial only, with identical thermal and electrical behavior | Choose when AEC-Q101 is not required and cost sensitivity favors Vishay's volume pricing |
Compared with SS35-E3/57T and SB350-E3/57T, the B350A-13 provides tighter high-temperature leakage control (0.5mA vs. ≥1.0mA) and certified automotive reliability, making it preferred for thermally demanding or safety-critical deployments despite marginally higher VF.
Availability
B350A-13 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial polarity protection circuits, and high-frequency inverter designs requiring stable component supply and long-term manufacturing continuity.
Supply support for B350A-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, signal integrity, and protection solutions for automotive, industrial, and consumer markets.
The B350A-13 belongs to Diodes' B3xxA Schottky rectifier product line, engineered for low-loss, high-efficiency power conversion in space-constrained surface-mount applications where thermal stability and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum junction temperature for continuous operation of the B350A-13?
The B350A-13 has a specified operating junction temperature range of –55°C to +150°C. It maintains rated 3.0A average current capability up to +100°C terminal temperature, with derating required above that point per Figure 6 in DS30891. Thermal design must ensure RθJA × PD + TA ≤ 150°C.
Is the B350A-13 compatible with lead-free reflow soldering processes?
Yes. The B350A-13 features matte-tin lead-free plating and is qualified for standard Pb-free reflow profiles per J-STD-020. Its moisture sensitivity level is rated at Level 1, allowing unlimited floor life at ≤30°C/60% RH without dry-pack requirements prior to assembly.
Does the B350A-13 have a documented surge current rating?
Yes. The B350A-13 is rated for 80A non-repetitive peak forward surge current (IFSM) under 8.3ms single half-sine-wave conditions. Derating curves in Figures 7 and 8 define allowable IFSM versus cycle count and ambient temperature for repeated surge events.
How does the guard ring construction improve reliability in real-world applications?
The guard ring die structure mitigates edge breakdown under transient overvoltage conditions, increasing robustness against ESD (≥8kV HBM) and line transients. This allows direct placement at input terminals without additional clamping components in 12V/24V automotive and industrial power inputs, verified per AEC-Q101 stress tests.
B350A-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- 200pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
B350A-13 FAQ
1.How can I place an order for B350A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B350A-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 B350A-13 reliable?
The price and inventory of B350A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B350A-13 is usually 5 days.
3.What payment methods are accepted for B350A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B350A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B350A-13?
B350A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B350A-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 B350A-13?
For technical support, including B350A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B350A-13 requirements.
6.How does Aetrix verify that B350A-13 is sourced from the original manufacturer or authorized distributors?
All B350A-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 B350A-13 meets industry standards.
7.What is the process for return or replacement of B350A-13?
All B350A-13 units undergo pre-shipment inspection (PSI). If there is an issue with B350A-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 B350A-13 part is unused and in its original packaging.
Return procedure for B350A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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