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Diodes Incorporated B320A-13
- Part No.:
- B320A-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
B320A-13.pdf
- Description:
- DIODE SCHOTTKY 20V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:8,964
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Product details
Overview
B320A-13 from Diodes Incorporated is a 20 V, 3.0 A surface-mount Schottky barrier rectifier in SMA package, featuring 0.50 V max forward voltage at 3 A and 0.5 mA max reverse leakage at rated voltage. It delivers low power loss for high-efficiency DC-DC converters and polarity protection circuits in automotive body electronics and industrial power supplies.
For engineers reviewing the B320A-13 datasheet, B320A-13 pinout, B320A-13 application, or B320A-13 equivalent, key selection criteria include its 20 V reverse voltage rating, thermal resistance of 140 °C/W (junction-to-ambient), AEC-Q101 qualification, and cathode-band polarity marking - all critical for low-voltage, high-frequency freewheeling designs.
Technical Context
This Schottky diode uses guard ring die construction to suppress transient-induced avalanche breakdown and improve reliability under repetitive surge conditions. Its low VF and fast switching enable high-frequency operation without significant conduction loss or reverse recovery delay.
The device operates across –55 °C to +150 °C junction temperature range and is qualified to AEC-Q101 standards, confirming suitability for automotive under-hood applications where thermal cycling and vibration resistance are essential. Its SMA package supports automated reflow assembly with lead-free matte-tin terminations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 12 V rail clamping and reverse polarity protection. |
| IO (AV) | 3.0 A @ TT = +100°C - Continuous average forward current capability under thermal-limited conditions on standard FR-4 PCB. |
| VF (max) | 0.50 V @ IF = 3.0 A, TA = +25°C - Low conduction loss enabling >92% efficiency in 5–12 V DC-DC output stages. |
| IR (max) | 0.5 mA @ VRRM, TA = +25°C - Minimal leakage preserves battery life in always-on automotive modules. |
| RθJA | 140 °C/W - Thermal resistance defines required PCB copper area (per AP02001) to maintain TJ ≤ +150°C at full load. |
| IFSM | 80 A @ 8.3 ms half-sine - Withstands inrush surges in motor drive flyback paths without degradation. |
| CT | 200 pF @ VR = 4 V, f = 1 MHz - Low junction capacitance minimizes switching noise in 100 kHz–1 MHz SMPS designs. |
Pinout & Package
Package: SMA (Surface Mount Axial), molded plastic case with UL 94V-0 flammability rating, 0.064 g weight, and cathode band polarity marking. Terminals are matte-tin plated, solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to lower-potential side (e.g., ground or return path) in freewheeling or reverse polarity protection configurations. |
| Cathode | Forward current exit terminal | Marked with band; connects to positive rail input or switch node - determines direction of unidirectional conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge breakdown during voltage transients, improving surge survivability in automotive load-dump environments. |
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control and lighting modules. |
| Lead-free & halogen-free | Meets RoHS 2 (2011/65/EU) and Diodes Inc.'s "Green" definition (<900 ppm Br/Cl, <1000 ppm Sb); compatible with Pb-free reflow profiles. |
| Low RθJT (25 °C/W) | Enables efficient heat transfer from junction to PCB pad, supporting stable operation at 3 A with minimal derating on compact layouts. |
Applications
| Automotive Body Control Module | Industrial DC-DC Converter |
|---|---|
Use Scenario: Reverse polarity protection on 12 V supply input to BCM microcontroller and CAN transceiver circuitry. IC Role / Device Role / Timing Role: Unidirectional blocking diode preventing damage during battery jump-start misconnection. Use Value: 0.50 V VF limits voltage drop to <2% at 3 A, preserving brown-out margin for 5 V LDO regulators downstream. |
Use Scenario: Output rectification in 24 V to 5 V synchronous buck converter for programmable logic controllers. IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFET body diode to reduce conduction loss and improve light-load efficiency. Use Value: 200 pF CT and zero reverse recovery minimize switching node ringing and EMI generation at 500 kHz switching frequency. |
| USB-C Power Delivery Adapter | Smart Lighting Driver |
Use Scenario: Input polarity protection in 20 V USB-PD adapter secondary-side regulation stage. IC Role / Device Role / Timing Role: Series-blocking diode ensuring correct voltage polarity to GaN FET gate drivers and feedback ICs. Use Value: AEC-Q101 qualification and 150 °C max TJ support sustained operation in enclosed, thermally constrained adapter housings. |
Use Scenario: Flyback catch diode in constant-current LED driver powering high-bay luminaires. IC Role / Device Role / Timing Role: Energy recirculation path during MOSFET off-time in quasi-resonant topology. Use Value: 80 A IFSM rating handles peak currents from 100 W LED strings without thermal runaway or parametric shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB320-E3/52 (Vishay) | Same 20 V VRRM, 3 A IO, but VF = 0.52 V (max @ 3 A); RθJA = 150 °C/W; no AEC-Q101 qualification. | Lacks automotive qualification; suitable for commercial power adapters but not under-hood use. | Select when cost sensitivity outweighs automotive compliance and thermal margin is sufficient. |
| SS32 (ON Semiconductor) | 20 V VRRM, 3 A IO, VF = 0.52 V (max), IR = 0.5 mA; RθJA = 130 °C/W; AEC-Q101 qualified. | Lower thermal resistance enables higher ambient operation but slightly higher VF increases conduction loss by ~40 mW at 3 A. | Prefer for space-constrained industrial designs needing tighter thermal budget, accepting minor efficiency trade-off. |
Compared with SB320-E3/52, B320A-13 offers superior thermal performance and automotive qualification; versus SS32, it trades 10 °C/W higher RθJA for 20 mV lower VF - favoring efficiency-critical, moderately thermally managed applications.
Availability
B320A-13 is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC-DC converters, and smart lighting drivers requiring stable component supply and long-term manufacturing continuity.
Supply support for B320A-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 and manufacturing operations across Asia and the Americas.
B320A-13 belongs to Diodes' high-reliability Schottky rectifier product line, engineered specifically for low-loss, high-frequency power conversion in automotive and industrial systems where efficiency and AEC-Q101 compliance are mandatory.
FAQ
What is the maximum junction temperature for continuous operation of B320A-13?
The B320A-13 has a specified operating junction temperature range of –55 °C to +150 °C. For continuous operation at 3.0 A average forward current, thermal design must ensure TJ does not exceed +150 °C - typically achieved using the recommended SMA pad layout (AP02001) on FR-4 with ≥1 cm² copper pour.
Is B320A-13 compatible with lead-free reflow soldering processes?
Yes. B320A-13 features matte-tin lead-free plating and is qualified for Pb-free reflow profiles per J-STD-020 Level 1 moisture sensitivity. Its terminals meet MIL-STD-202 Method 208 solderability requirements, supporting peak temperatures up to 260 °C for 10 seconds.
How does the guard ring construction improve reliability in automotive applications?
The guard ring die structure prevents premature edge breakdown during load-dump transients (ISO 7637-2 Pulse 5a) by redistributing electric field stress away from the silicon periphery. This extends surge lifetime and maintains stable VF and IR parameters after repeated 100 V/100 ms overvoltage events.
Can B320A-13 be used in place of B330A-13 or B340A-13 in existing designs?
No - B320A-13 is rated for 20 V VRRM, while B330A-13 and B340A-13 are rated for 30 V and 40 V respectively. Substituting B320A-13 in a 30+ V circuit risks reverse breakdown and catastrophic failure; voltage rating must match or exceed system maximum reverse potential.
B320A-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):
- 20 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 @ 20 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
B320A-13 FAQ
1.How can I place an order for B320A-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B320A-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 B320A-13 reliable?
The price and inventory of B320A-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B320A-13 is usually 5 days.
3.What payment methods are accepted for B320A-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B320A-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B320A-13?
B320A-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B320A-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 B320A-13?
For technical support, including B320A-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B320A-13 requirements.
6.How does Aetrix verify that B320A-13 is sourced from the original manufacturer or authorized distributors?
All B320A-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 B320A-13 meets industry standards.
7.What is the process for return or replacement of B320A-13?
All B320A-13 units undergo pre-shipment inspection (PSI). If there is an issue with B320A-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 B320A-13 part is unused and in its original packaging.
Return procedure for B320A-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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