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Diodes Incorporated SBR3U40S1F-7
- Part No.:
- SBR3U40S1F-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- SOD-123
- Datasheet:
-
SBR3U40S1F-7.pdf
- Description:
- DIODE SBR 40V 3A SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,004
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Product details
Overview
SBR3U40S1F-7 from Diodes Incorporated is a 40 V, 3 A ultra-low VF super barrier rectifier in SOD123F package, featuring 0.49 V max forward voltage at 3 A and 180 µA max reverse leakage at 40 V/25°C. It delivers high surge capability (50 A IFSM), operates up to +150°C junction temperature, and is qualified to AEC-Q standards for automotive-grade reliability - used in DC-DC converter output stages and reverse-polarity protection circuits.
For engineers reviewing the SBR3U40S1F-7 datasheet, SBR3U40S1F-7 pinout, SBR3U40S1F-7 application, or SBR3U40S1F-7 equivalent, key selection criteria include forward voltage stability across temperature, low IR at elevated TJ, JEDEC-qualified thermal robustness, and SOD123F footprint compatibility with space-constrained power rails.
Technical Context
This SBR device uses patented Super Barrier Rectifier (SBR®) technology to achieve Schottky-like forward voltage with significantly lower reverse leakage than conventional Schottky diodes. Its interlocking clip design enhances thermal path integrity and enables 50 A non-repetitive surge current handling under 8.3 ms half-sine wave conditions.
The SOD123F package provides 100 °C/W RθJA on standard FR-4 (0.4" × 0.5", 2 oz copper), supporting continuous 3 A operation up to +85°C ambient when derated per Figure 4. Junction capacitance remains below 100 pF at 1 MHz and VR = 4 V, minimizing switching noise in high-frequency SMPS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Blocks up to 40 V DC or peak reverse voltage without breakdown; suitable for 24 V system rail clamping and 36 V input SMPS front ends. |
| IO (avg) | 3 A - Continuous DC output current rating at TA = +25°C; supports compact 12–24 V DC-DC converters with minimal heatsinking. |
| VF (max) | 0.49 V @ 3 A, 25°C - Reduces conduction loss by ~30% vs. standard PN rectifiers; improves efficiency in high-current, low-VOUT applications. |
| IR (max) | 180 µA @ 40 V, 25°C - Low leakage preserves battery life in always-on reverse-polarity protection; stable up to 125°C (60 µA). |
| IFSM | 50 A @ 8.3 ms - Withstands inrush and transient surges in automotive load-dump scenarios and hot-swap circuits. |
| TJ range | −65°C to +150°C - Enables deployment in under-hood automotive modules and industrial power supplies without derating penalties. |
Pinout & Package
Package: SOD123F - surface-mount, single-diode configuration with cathode band marking; molded green plastic (UL 94V-0), matte tin-plated copper leadframe, 0.016 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to source side (e.g., input rail or battery positive); accepts forward current up to 3 A continuous. |
| Cathode | Output current terminal | Marked with band; delivers rectified output to load or downstream regulator; referenced to ground or return path. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.49 V max @ 3 A ensures <0.2 W conduction loss at full load - critical for thermally constrained 5 mm × 3 mm DC-DC modules. |
| Patented SBR® technology | Combines metal-semiconductor interface with tailored barrier engineering to suppress thermal runaway and extend lifetime vs. Schottky alternatives. |
| +150°C operation | Rated junction temperature allows direct placement near MOSFETs or inductors without thermal throttling in sealed enclosures. |
| AEC-Q qualified | Meets stress test requirements per AEC-Q200 for vibration, temperature cycling, and humidity exposure - validated for automotive power systems. |
Applications
| DC-DC Converter Output Rectification | Reverse-Polarity Protection |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in isolated 12 V → 3.3 V/5 V flyback converters. IC Role / Device Role / Timing Role: Uncontrolled rectifier providing low-loss, fast-recovery path for transformer secondary current. Use Value: 0.49 V VF reduces conduction loss by 0.36 W vs. 1N5822 at 3 A, lowering thermal stress on PCB layout. |
Use Scenario: Input protection for USB-C PD power delivery modules accepting ±24 V input. IC Role / Device Role / Timing Role: Series-blocking diode preventing damage during accidental reverse battery connection. Use Value: 180 µA IR at 25°C minimizes standby drain; 60 µA at 125°C maintains battery hold-up time in engine-bay environments. |
| AC-DC Adapter Secondary Side | Automotive Body Control Module (BCM) |
Use Scenario: Output rectification in compact 24 V AC-DC wall adapters powering IoT gateways. IC Role / Device Role / Timing Role: High-efficiency freewheeling path for flyback or forward converter outputs. Use Value: SOD123F footprint fits 5.0 mm × 3.0 mm board area constraints while sustaining 3 A average current. |
Use Scenario: Reverse-voltage clamp on LIN bus transceiver supply lines in door module ECUs. IC Role / Device Role / Timing Role: Polarity guard protecting 5 V LDO inputs from jump-start transients. Use Value: AEC-Q qualification and 50 A IFSM withstand 12 V battery reversal events per ISO 16750-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT3U40S1F-7 | Same electrical specs but optimized for enhanced moisture resistance (MSL 1 confirmed); identical SOD123F package and marking. | Preferred for high-humidity industrial control panels where long-term storage before reflow is expected. | Select when J-STD-020 MSL 1 compliance must be explicitly documented beyond standard qualification. |
| VB340-GS08 | Higher VF (0.55 V max @ 3 A), higher IR (300 µA @ 40 V/25°C), same 40 V/3 A rating and SOD-123 package. | Acceptable for cost-sensitive consumer adapters where 15 mW extra loss per diode is tolerable. | Choose only if BOM cost reduction outweighs 12% conduction loss increase and reduced high-temp leakage margin. |
Compared with SBRT3U40S1F-7, the SBR3U40S1F-7 offers identical performance with standard MSL 1 assurance, while VB340-GS08 trades efficiency and leakage for lower unit cost - making the original optimal for thermally demanding, automotive-qualified, or high-reliability deployments.
Availability
SBR3U40S1F-7 is available at Aetrix Electronics and suitable for DC-DC converters, reverse-polarity protection circuits, and AC-DC rectifiers requiring stable component supply, AEC-Q traceability, and SOD123F footprint consistency.
Supply support for SBR3U40S1F-7 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 centers across Asia and manufacturing in China, Taiwan, and the U.S.
The SBR® product line targets high-efficiency power conversion in automotive, industrial, and computing applications, delivering Schottky-equivalent VF with PN-diode-level reliability and temperature stability.
FAQ
Is SBR3U40S1F-7 pin-compatible with standard SOD123F Schottky diodes?
Yes - it uses the industry-standard SOD123F outline with anode/cathode terminals in identical physical locations. The cathode band marking matches JEDEC MO-202AA, enabling drop-in replacement in existing layouts without footprint changes.
What is the maximum ambient temperature for 3 A continuous operation?
Per Figure 4, the device supports 3 A up to +85°C ambient on a standard FR-4 board (0.4" × 0.5", 2 oz copper). Above that, derating is required: 2.5 A at +100°C, 1.5 A at +125°C, and zero at +150°C ambient.
Does SBR3U40S1F-7 meet automotive qualification requirements?
It is qualified to AEC-Q200 stress test standards per Diodes' product definitions, though the automotive-grade variant SBR3U40S1FQ has additional PPAP documentation and extended temperature screening. This part is suitable for non-safety-critical automotive subsystems.
How does its reverse leakage compare to conventional Schottky diodes at high temperature?
At +125°C and 40 V reverse bias, SBR3U40S1F-7 exhibits ≤60 µA IR - typically 3–5× lower than comparable Schottky diodes (e.g., 200–300 µA), due to SBR® barrier engineering that suppresses thermionic emission rise with temperature.
SBR3U40S1F-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Super Barrier
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 490 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 180 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR3U40S1F-7 FAQ
1.How can I place an order for SBR3U40S1F-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR3U40S1F-7 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 SBR3U40S1F-7 reliable?
The price and inventory of SBR3U40S1F-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR3U40S1F-7 is usually 5 days.
3.What payment methods are accepted for SBR3U40S1F-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR3U40S1F-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR3U40S1F-7?
SBR3U40S1F-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR3U40S1F-7 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 SBR3U40S1F-7?
For technical support, including SBR3U40S1F-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR3U40S1F-7 requirements.
6.How does Aetrix verify that SBR3U40S1F-7 is sourced from the original manufacturer or authorized distributors?
All SBR3U40S1F-7 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 SBR3U40S1F-7 meets industry standards.
7.What is the process for return or replacement of SBR3U40S1F-7?
All SBR3U40S1F-7 units undergo pre-shipment inspection (PSI). If there is an issue with SBR3U40S1F-7, 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 SBR3U40S1F-7 part is unused and in its original packaging.
Return procedure for SBR3U40S1F-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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