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Diodes Incorporated SB380-T
- Part No.:
- SB380-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
SB380-T.pdf
- Description:
- DIODE SCHOTTKY 80V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
SB380-T from Diodes Incorporated is a 3.0A, 80V Schottky barrier rectifier in DO-201AD package, featuring 0.79V forward voltage at 3.0A, 100A non-repetitive surge capability, and guard ring die construction for transient protection. It serves as a low-loss freewheeling or polarity protection diode in DC-DC converters and automotive auxiliary power supplies.
For engineers reviewing the SB380-T datasheet, SB380-T pinout, SB380-T application, or SB380-T equivalent, this device is selected for high-efficiency 12V/24V automotive subsystems, compact AC/DC adapters, and reverse-polarity protected battery interfaces where low VF, fast switching, and robust surge handling are critical.
Technical Context
This Schottky rectifier uses a planar guard ring die structure to enhance transient voltage immunity without compromising forward conduction. Its 250pF junction capacitance at 4V reverse bias and 20K/W junction-to-ambient thermal resistance support stable operation up to +150°C junction temperature under 3.0A DC load at +80°C ambient.
The device operates with no minority-carrier storage delay, enabling use in high-frequency (≥100kHz) switching topologies. Its 0.5mA peak reverse leakage at 25°C and 20mA at 100°C ensures minimal standby loss in always-on automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 80V - Maximum repetitive reverse blocking voltage; defines safe operating limit in 12V/24V automotive systems with load dump transients. |
| IO | 3.0A @ TL = +80°C - Continuous DC output current rating; supports compact heatsink-free designs in space-constrained adapters. |
| VFM | 0.79V @ IF = 3.0A - Low forward drop reduces conduction loss to ≤2.4W, improving efficiency in 5–12V output stages. |
| IFSM | 100A (8.3ms half-sine) - Withstands motor startup surges and ESD-induced transients without failure. |
| CJ | 250pF @ 1MHz, 4V - Enables clean switching in 100–500kHz SMPS without excessive ringing or EMI. |
| RθJA | 20K/W - Allows direct PCB copper pour cooling; no external heatsink needed for ≤2.5W dissipation at ambient ≤50°C. |
Pinout & Package
DO-201AD axial-leaded plastic package with cathode band marking; 1.1g mass; UL 94V-0 rated molding compound; tin-plated terminals solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to input/source side; must handle full 3.0A DC and 100A surge without trace fusing. |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking node | Connected to output/load; cathode band orientation prevents reverse polarity installation in production assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves transient immunity by suppressing edge breakdown during load dump events (ISO 7637-2 Pulse 5a). |
| Low forward voltage (0.79V) | Reduces power loss by ≥35% vs. comparable PN rectifiers, enabling smaller thermal pads in portable chargers. |
| 100A surge rating | Supports single-event survival in automotive starter circuits and industrial motor controllers without derating. |
| RoHS-compliant lead finish | Tin plating ensures compatibility with lead-free reflow profiles (J-STD-020 Level 1) and eliminates post-solder cleaning. |
Applications
| Automotive Body Control Module | USB-C Power Delivery Adapter |
|---|---|
Use Scenario: Reverse polarity protection on 12V supply rail feeding microcontroller, CAN transceiver, and LED drivers. IC Role / Device Role / Timing Role: Unidirectional current gate preventing damage during battery terminal misconnection. Use Value: 0.79V VF limits voltage drop to <0.8V at 3A, preserving >11.2V minimum for logic ICs under full load. | Use Scenario: Output rectification in 65W GaN-based flyback converter with 200kHz switching frequency. IC Role / Device Role / Timing Role: High-speed freewheeling diode replacing slower PN types to reduce switching losses. Use Value: 250pF CJ minimizes capacitive turn-on loss; enables >94% efficiency at 20V/3.25A output. |
| Industrial PLC Digital Input Card | Medical Patient Monitor Power Supply |
Use Scenario: Polarity protection for 24V DC field wiring inputs exposed to accidental reverse connection. IC Role / Device Role / Timing Role: Fail-safe series blocking element ensuring system integrity during field maintenance. Use Value: Guard ring structure withstands 1kV EFT bursts (IEC 61000-4-4) without parametric shift or hard failure. | Use Scenario: Secondary-side rectification in isolated 5V/3A auxiliary supply powering analog sensor front-ends. IC Role / Device Role / Timing Role: Low-noise DC output generator minimizing ripple-induced measurement error. Use Value: 0.5mA IR at 25°C ensures <1.5mW standby loss, critical for battery-backed backup operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB380-E3/57T (Vishay) | Same 80V/3A rating, but 0.85V VF at 3A and 300pF CJ; DO-201AD package. | Higher conduction loss reduces efficiency in thermally constrained USB PD adapters. | Select when cost sensitivity outweighs 60mV VF advantage and higher CJ is acceptable. |
| SS38 (ON Semiconductor) | 80V/3A, 0.82V VF, 220pF CJ, but only rated for 50A IFSM. | Inadequate for automotive load dump scenarios requiring 100A surge margin. | Prefer for consumer-grade AC/DC adapters where surge stress is limited to <50A. |
Compared with SB380-E3/57T and SS38, the SB380-T delivers the lowest forward voltage and highest surge rating in its class, making it optimal for automotive and high-reliability industrial power rails where thermal headroom and transient resilience are design-critical.
Availability
SB380-T is available at Aetrix Electronics and suitable for automotive body control modules, USB-C power delivery adapters, and industrial PLC digital input cards requiring stable component supply across multi-year production cycles.
Supply support for SB380-T 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.
The SB380-T belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical 12–48V DC power conversion in automotive, industrial, and computing applications.
FAQ
What is the maximum junction temperature for continuous operation of the SB380-T?
The SB380-T has an operating junction temperature range of –65°C to +150°C. For continuous 3.0A DC operation, thermal design must ensure junction temperature stays within this limit-typically achieved using ≥100mm² 2oz copper pad at ambient ≤80°C, given its 20K/W RθJA.
Is the SB380-T qualified to AEC-Q101 for automotive use?
No-the SB380-T is not AEC-Q101 qualified. Diodes offers AEC-Q101 versions (e.g., SB380Q) with PPAP documentation and IATF 16949 manufacturing; standard SB380-T is intended for industrial and commercial applications unless explicitly validated for automotive use by the customer.
Can the SB380-T replace a 1N5822 in an existing design?
Yes-SB380-T matches 1N5822's DO-201AD package, 3A rating, and 80V VRRM, but improves VF from 0.9V to 0.79V and doubles IFSM from 50A to 100A. No layout change is needed, and thermal performance improves due to lower conduction loss.
Does the SB380-T require derating for capacitive loads?
Yes-per datasheet Note 4, average rectified current must be derated by 20% when used with capacitive loads (e.g., bulk capacitor input filters), reducing usable IO from 3.0A to 2.4A at TL = +80°C to prevent overheating from peak charging currents.
SB380-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 80 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 @ 80 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
SB380-T FAQ
1.How can I place an order for SB380-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SB380-T 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 SB380-T reliable?
The price and inventory of SB380-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SB380-T is usually 5 days.
3.What payment methods are accepted for SB380-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SB380-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SB380-T?
SB380-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SB380-T 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 SB380-T?
For technical support, including SB380-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SB380-T requirements.
6.How does Aetrix verify that SB380-T is sourced from the original manufacturer or authorized distributors?
All SB380-T 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 SB380-T meets industry standards.
7.What is the process for return or replacement of SB380-T?
All SB380-T units undergo pre-shipment inspection (PSI). If there is an issue with SB380-T, 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 SB380-T part is unused and in its original packaging.
Return procedure for SB380-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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