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Diodes Incorporated SBR3A40SAQ-13
- Part No.:
- SBR3A40SAQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SBR3A40SAQ-13.pdf
- Description:
- DIODE SBR 40V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,273
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Product details
Overview
SBR3A40SAQ-13 from Diodes Incorporated is a 3.0A, 40V Super Barrier Rectifier (SBR®) in SMA package, featuring 500mV max forward voltage at 3A/25°C, 400µA max reverse leakage at 40V/25°C, and soft fast switching for high-efficiency DC-DC converters in automotive power supplies.
For engineers reviewing the SBR3A40SAQ-13 datasheet, SBR3A40SAQ-13 pinout, SBR3A40SAQ-13 application, or SBR3A40SAQ-13 equivalent, key selection criteria include junction temperature rating (+150°C), AEC-Q101 qualification, low VF vs. IR trade-off, and SMA thermal resistance (RθJA = 124°C/W on FR-4).
Technical Context
This SBR rectifier uses patented Super Barrier technology to achieve lower forward voltage than Schottky diodes while maintaining significantly lower reverse leakage than standard silicon PN diodes. Its 12ns typical reverse recovery time and soft recovery waveform minimize EMI in high-frequency switching topologies.
Designed for automotive-grade reliability, it operates from −65°C to +150°C junction temperature, supports 45A non-repetitive surge current, and delivers stable performance under capacitive load conditions with 20% IO derating - critical for synchronous rectification and freewheeling in 12V/48V vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in 12V automotive systems with load-dump transients. |
| IO(AV) | 3.0 A - Average forward current rating at TA = +25°C; usable up to ~1.8A at +85°C ambient per derating curve. |
| VF(MAX) | 500 mV @ 3A/25°C - Low conduction loss enables >95% efficiency in compact 5–24V DC-DC stages. |
| IR(MAX) | 400 µA @ 40V/25°C - Ultra-low leakage preserves standby power in always-on vehicle modules. |
| tRR | 12 ns - Fast, soft recovery reduces switching noise and snubber losses in MHz-range converters. |
| TJ(max) | +150°C - Enables placement near hot components (e.g., MOSFETs, inductors) without thermal derating penalties. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive discrete semiconductors including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode-banded, lead-free matte tin plating, UL 94V-0 molded plastic body, weight 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input | Connected to switching node (e.g., buck converter high-side switch drain); accepts 45A surge. |
| Cathode | Forward current output / reverse voltage reference | Connected to output rail or ground return; serves as thermal path to PCB copper via soldered tab. |
Key Features
| Feature | Design Value |
|---|---|
| Super Barrier Rectifier (SBR®) Technology | Combines Schottky-like VF with silicon-diode-level IR - eliminates need for thermal derating compromises in space-constrained designs. |
| Soft, Fast Switching | 12ns tRR with low di/dt-induced voltage overshoot - reduces EMI filter component count and layout area. |
| +150°C Junction Rating | Enables operation in engine bay or powertrain control units without forced air or heatsinks. |
| AEC-Q101 Qualified & PPAP Capable | Validated for automotive production use with full change control, traceable lot data, and IATF 16949 manufacturing. |
Applications
| Automotive Body Control Module (BCM) | Infotainment Power Supply |
|---|---|
Use Scenario: Regulates 12V battery input to 3.3V/5V rails for microcontrollers and CAN transceivers. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck converter; handles reverse recovery during high-side FET turn-off. Use Value: 500mV VF minimizes conduction loss at 2–3A loads; 400µA IR prevents battery drain during sleep mode. | Use Scenario: Supplies clean 5V to display drivers and audio codecs in head unit power tree. IC Role / Device Role / Timing Role: Output rectifier in isolated flyback or non-isolated buck-boost stage. Use Value: Soft recovery suppresses radiated emissions near sensitive RF receivers; AEC-Q101 ensures long-term reliability. |
| ADAS Camera Power Management | Electric Power Steering (EPS) Auxiliary Rail |
Use Scenario: Powers image sensor and ISP in compact rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Secondary rectifier in compact 12V-to-1.8V/2.5V point-of-load converter. Use Value: +150°C TJ rating allows mounting directly on camera PCB near heat-generating image sensors. | Use Scenario: Generates isolated 5V/12V auxiliary supply for EPS motor controller logic and gate drivers. IC Role / Device Role / Timing Role: Freewheeling diode in half-bridge bootstrap circuit or DC-DC post-regulator. Use Value: 45A IFSM withstands motor stall-induced current surges; RoHS/Green compliance meets OEM material declarations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT3A40SAQ-13 | Same die, enhanced surge robustness (IFSM = 50A), identical VF/IR specs and package. | Preferred for EPS or starter-generator circuits where higher transient immunity is required. | Select when system-level surge testing exceeds 45A or requires margin beyond AEC-Q101 baseline. |
| MBR340G | Standard Schottky; VF ≈ 450mV @ 3A but IR = 1.5mA @ 40V - 3.75× higher leakage. | Suitable for non-automotive consumer DC-DC where standby current is not critical. | Choose only if cost sensitivity outweighs leakage and thermal stability requirements. |
Compared with MBR340G, SBR3A40SAQ-13 delivers 3.75× lower IR for battery-sensitive applications; versus SBRT3A40SAQ-13, it offers proven cost-optimized surge capability for most BCM and infotainment use cases.
Availability
SBR3A40SAQ-13 is available at Aetrix Electronics and suitable for automotive body control modules, infotainment power supplies, and ADAS camera power management requiring stable component supply across multi-year vehicle production cycles.
Supply support for SBR3A40SAQ-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, manufacturing, and sales operations across Asia, Europe, and North America.
The SBR® product line delivers high-performance, automotive-qualified rectifiers optimized for efficiency-critical power conversion in 12V/48V vehicle architectures - balancing low VF, low IR, and rugged transient response.
FAQ
What is the difference between SBR3A40SAQ-13 and SBR3A40SA-13?
The "Q" suffix denotes automotive qualification: SBR3A40SAQ-13 is AEC-Q101 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities, whereas SBR3A40SA-13 is for commercial/industrial use only. Both share identical electrical specs and SMA packaging.
Can SBR3A40SAQ-13 replace a standard Schottky diode like 1N5822?
Yes, in most 3A/40V applications - but verify thermal design: SBR3A40SAQ-13 has higher RθJA (124°C/W) than TO-220 Schottkys. Its 500mV VF is slightly higher than 1N5822's ~450mV, yet its 400µA IR is dramatically lower than 1N5822's ~500µA at 25°C and >10× lower at 125°C.
Is the SMA package suitable for reflow soldering?
Yes - it is rated for moisture sensitivity level 1 per J-STD-020 and compatible with standard Pb-free reflow profiles (peak 260°C). The matte tin finish ensures reliable wetting, and the 0.064g mass enables uniform heating without tombstoning on fine-pitch layouts.
Does SBR3A40SAQ-13 require a heatsink in 3A continuous operation?
No - at TA = +25°C, its 1.2W power dissipation (3A × 0.4V ≈ 1.2W) yields ~149°C junction rise (1.2W × 124°C/W), exceeding +150°C rating. Derating is mandatory: maximum continuous IO is ~1.8A at +25°C ambient or ~1.2A at +85°C ambient per Fig. 5.
SBR3A40SAQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- SBR®
- Package/Case:
- DO-214AC, SMA
- 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:
- 480 mV @ 3 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR3A40SAQ-13 FAQ
1.How can I place an order for SBR3A40SAQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR3A40SAQ-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 SBR3A40SAQ-13 reliable?
The price and inventory of SBR3A40SAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR3A40SAQ-13 is usually 5 days.
3.What payment methods are accepted for SBR3A40SAQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR3A40SAQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR3A40SAQ-13?
SBR3A40SAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR3A40SAQ-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 SBR3A40SAQ-13?
For technical support, including SBR3A40SAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR3A40SAQ-13 requirements.
6.How does Aetrix verify that SBR3A40SAQ-13 is sourced from the original manufacturer or authorized distributors?
All SBR3A40SAQ-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 SBR3A40SAQ-13 meets industry standards.
7.What is the process for return or replacement of SBR3A40SAQ-13?
All SBR3A40SAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBR3A40SAQ-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 SBR3A40SAQ-13 part is unused and in its original packaging.
Return procedure for SBR3A40SAQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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