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Diodes Incorporated B390-13
- Part No.:
- B390-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
B390-13.pdf
- Description:
- DIODE SCHOTTKY 90V 3A SMC
- Quantity:
- Payment:
- Shipping:
Inventory:4,268
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Product details
Overview
B390-13 from Diodes Incorporated is a 3.0A, 90V peak repetitive reverse voltage Schottky barrier rectifier in SMC package, optimized for low-loss freewheeling and polarity protection in DC-DC converters and switch-mode power supplies. It features 0.79V forward voltage at 3.0A/25°C, 100A non-repetitive surge rating, and guard ring die construction for transient robustness.
For engineers reviewing the B390-13 datasheet, B390-13 pinout, B390-13 application, or B390-13 equivalent, key selection criteria include forward voltage at operating current, thermal resistance (10°C/W), reverse leakage at 100°C (20mA), and SMC package compatibility with high-density PCB layouts.
Technical Context
This Schottky rectifier uses a guard ring die structure to suppress edge breakdown and improve surge immunity under transient overvoltage conditions. Its low VF and fast recovery enable high-efficiency operation in 100–500kHz switching topologies without reverse recovery charge penalties.
Thermal design is enabled by direct junction-to-terminal conduction (RθJT = 10°C/W) and a rated operating junction temperature range of –55°C to +125°C. The device exhibits 100pF total capacitance at 4V reverse bias, supporting stable performance in high-frequency snubberless designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 90 V - Maximum repetitive reverse blocking capability; defines safe DC input voltage headroom before avalanche onset |
| IO @ TT=90°C | 3.0 A - Continuous average forward current derated to terminal temperature; sets PCB copper area and heatsinking requirements |
| VF @ 3.0A, 25°C | 0.79 V - Forward conduction loss at nominal load; directly determines I²R power dissipation and efficiency at light-to-moderate loads |
| IFSM (8.3ms) | 100 A - Single half-sine surge withstand; supports inrush current handling in offline AC-DC front-ends and motor drive freewheeling |
| RθJT | 10 °C/W - Junction-to-terminal thermal resistance; enables direct thermal modeling from die to PCB pad without heatsink assumptions |
| IR @ VR, 100°C | 20 mA - High-temperature reverse leakage; impacts standby power loss and thermal runaway risk in parallel configurations |
Pinout & Package
Package: SMC (DO-214AB), surface-mount molded plastic case with matte tin-plated terminals, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to switched/high-side node in freewheeling path; requires low-inductance trace routing to minimize voltage spikes |
| Cathode | Forward current exit node / reverse voltage reference | Marked with band or notch; ties to ground or low-side rail; serves as reference for reverse bias stress across output capacitors |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge avalanche during voltage transients, enabling reliable operation in unclamped inductive switching circuits |
| Low VF at 100°C | 0.69 V at 3.0A/100°C - maintains <0.7V conduction loss even under full thermal load, reducing thermal runaway risk |
| Green molding compound | Halogen-free and antimony-free epoxy - meets IPC-4101D/82 and RoHS Annex III exemptions for industrial environmental compliance |
| Lead-free finish | Matte tin plating - compatible with Pb-free reflow profiles (J-STD-020 Class 1), eliminating post-assembly lead contamination concerns |
Applications
| DC-DC Converter Freewheeling Diode | Input Polarity Protection |
|---|---|
Use Scenario: Placed across the low-side MOSFET in synchronous buck converters to conduct inductive current during high-side switch off-time. IC Role / Device Role / Timing Role: Uncontrolled freewheeling diode providing continuous current path during dead time; no timing control required but must recover instantly. Use Value: 0.79V VF minimizes conduction loss at 3A, improving converter efficiency by ~0.8% vs. standard PN diodes; 100pF CT avoids resonance with gate drivers. | Use Scenario: Series-connected at DC input to prevent damage from reversed battery or adapter connections in portable electronics. IC Role / Device Role / Timing Role: Passive polarity enforcement element; conducts only when input polarity is correct, blocking reverse voltage up to 90V. Use Value: 90V VRRM provides 2× margin over 48V systems; 20mA IR at 100°C ensures minimal standby drain in always-on devices. |
| High-Frequency Inverter Output Rectification | Automotive LED Driver Freewheel Path |
Use Scenario: Output rectifier in 200kHz resonant LLC inverters powering cold-cathode fluorescent lamps or induction heaters. IC Role / Device Role / Timing Role: High-speed unidirectional current valve; handles bidirectional voltage reversal without reverse recovery delay. Use Value: Zero reverse recovery charge eliminates switching losses and EMI spikes; 100A IFSM withstands transformer saturation surges. | Use Scenario: Freewheel diode across inductive LED driver chokes in 12V automotive lighting modules. IC Role / Device Role / Timing Role: Current recirculation path during PWM off-cycle; must operate reliably from –40°C to +125°C under engine bay conditions. Use Value: –55°C to +125°C TJ range and 10°C/W RθJT ensure stable operation without derating in confined enclosures; RoHS/Green compliance meets automotive OEM specs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB390-E3/52T (Vishay) | Same 90V VRRM and 3A IO, but VF = 0.85V @ 3A/25°C; RθJT = 12°C/W | Higher conduction loss and thermal resistance reduce efficiency in thermally constrained layouts | Select when legacy Vishay footprint compatibility is required over minimal VF advantage |
| SS39 (ON Semiconductor) | 90V VRRM, 3A IO, VF = 0.75V @ 3A/25°C, but IFSM = 80A and RθJT = 15°C/W | Lower surge rating limits use in high-inertia motor drives; higher thermal resistance demands larger copper area | Prefer for cost-sensitive consumer applications where 80A surge margin suffices and board space allows extra thermal relief |
Compared with SB390-E3/52T and SS39, B390-13 delivers the lowest VF at elevated temperature (0.69V @ 100°C) and best thermal coupling (10°C/W), making it optimal for compact, high-efficiency 12–48V industrial power stages where thermal headroom is limited.
Availability
B390-13 is available at Aetrix Electronics and suitable for DC-DC converter freewheeling, automotive LED driver protection, and industrial input polarity safeguarding requiring stable component supply across multi-year production cycles.
Supply support for B390-13 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 automotive markets.
The B370–B3100 series targets high-current, high-voltage Schottky rectification in space-constrained power conversion systems, emphasizing surge robustness, thermal efficiency, and environmental compliance.
FAQ
What is the maximum junction temperature for continuous operation of B390-13?
The B390-13 has a specified operating junction temperature range of –55°C to +125°C. Continuous operation at +125°C is permitted provided the average rectified current is derated per Figure 3 in DS30020 Rev. 14–2, and thermal design maintains TJ ≤ 125°C under worst-case ambient and power dissipation conditions.
Can B390-13 be used in parallel configurations?
Yes, but only with careful thermal and electrical balancing. Due to positive temperature coefficient of forward voltage, paralleling improves current sharing at elevated temperatures. However, layout symmetry, matched trace inductance, and shared thermal mass are mandatory to avoid current hogging and localized overheating.
Is B390-13 suitable for automotive under-hood applications?
Yes - its –55°C to +125°C operating temperature range, AEC-Q101 pre-qualification (per Diodes Inc. product family alignment), RoHS/Green compliance, and 100A surge rating meet core requirements for engine control unit power rails, LED headlight drivers, and body electronics polarity protection.
How does the guard ring die construction improve reliability?
The guard ring reduces electric field crowding at the silicon periphery, suppressing premature edge breakdown during voltage transients. This extends usable life in unclamped inductive switching environments and improves consistency of VRRM across manufacturing lots without requiring external snubbers.
B390-13 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):
- 90 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 790 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 90 V
- Capacitance @ Vr, F:
- 100pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMC
- Operating Temperature - Junction:
- -55°C ~ 125°C
B390-13 FAQ
1.How can I place an order for B390-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for B390-13 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 B390-13 reliable?
The price and inventory of B390-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for B390-13 is usually 5 days.
3.What payment methods are accepted for B390-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for B390-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for B390-13?
B390-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your B390-13 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 B390-13?
For technical support, including B390-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your B390-13 requirements.
6.How does Aetrix verify that B390-13 is sourced from the original manufacturer or authorized distributors?
All B390-13 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 B390-13 meets industry standards.
7.What is the process for return or replacement of B390-13?
All B390-13 units undergo pre-shipment inspection (PSI). If there is an issue with B390-13, 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 B390-13 part is unused and in its original packaging.
Return procedure for B390-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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