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Diodes Incorporated SBR3A40SA-13
- Part No.:
- SBR3A40SA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SBR3A40SA-13.pdf
- Description:
- DIODE SBR 40V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:21,366
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Product details
Overview
SBR3A40SA-13 from Diodes Incorporated is a 3.0A, 40V Super Barrier Rectifier in SMA package, featuring 500mV max forward voltage at 3A and 400µA max reverse leakage at 40V/25°C. It delivers soft, fast switching with 12ns reverse recovery time and operates up to +150°C junction temperature, optimized for high-efficiency secondary-side rectification in AC-DC and DC-DC converters.
For engineers reviewing the SBR3A40SA-13 datasheet, SBR3A40SA-13 pinout, SBR3A40SA-13 application, or SBR3A40SA-13 equivalent, key selection criteria include low VF at high current, minimal IR across temperature, robust surge capability (45A IFSM), and AEC-Q101 qualification availability via the SBR3A40SAQ-13 variant.
Technical Context
This discrete Schottky-like rectifier uses Diodes Inc.'s patented SBR® technology to achieve lower forward voltage than standard Schottkys while maintaining significantly lower reverse leakage than conventional PN diodes. Its 12ns tRR and soft recovery waveform reduce EMI in high-frequency switching topologies.
The device is rated for 3A average forward current with thermal resistance RθJA = 124°C/W on FR-4 PCB (2oz Cu), and supports derated operation up to +150°C ambient when mounted per recommended pad layout. Junction capacitance is 130pF at 4V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage without breakdown |
| IO(AV) | 3 A - Continuous average forward current rating at TA = +25°C |
| VF(MAX) | 500 mV - Max forward voltage drop at IF = 3A, TJ = +25°C; enables <0.5W conduction loss |
| IR(MAX) | 400 µA - Max reverse leakage at VR = 40V, TA = +25°C; ensures low standby power loss |
| tRR | 12 ns - Typical reverse recovery time at IF = 0.5A, IR = 1A; minimizes switching loss & EMI |
| IFSM | 45 A - Non-repetitive peak surge current (8.3ms half-sine); withstands startup/short-circuit transients |
| TJ(max) | +150 °C - Maximum junction temperature; supports high-ambient industrial & automotive under-hood use |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode-banded polarity indicator, lead-free matte tin plating, UL 94V-0 molded plastic body, weight ≈0.064g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry node | Connected to lower-potential side (e.g., transformer secondary center-tap or switch node) |
| Cathode | Forward current exit node | Connected to output rail; marked by band; serves as thermal and electrical reference point |
Key Features
| Feature | Design Value |
|---|---|
| Patented SBR® technology | Combines low VF of Schottky with low IR of PN diodes-enables higher efficiency than alternatives at >85°C |
| Soft, fast switching | 12ns tRR with controlled recovery waveform-reduces voltage overshoot and EMI in synchronous rectifiers |
| +150°C operating junction temperature | Rated continuous operation up to TJ = +150°C-supports compact, sealed, or high-ambient designs |
| Lead-free & Halogen-free "Green" construction | RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb); meets automotive and industrial environmental mandates |
Applications
| Server SMPS Secondary Rectification | Industrial DC-DC Converter Output Stage |
|---|---|
Use Scenario: High-density 48V-to-12V/5V isolated DC-DC modules in datacenter power supplies. IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier replacing Schottky diodes to reduce conduction loss and thermal stress. Use Value: 500mV VF at 3A lowers conduction loss by ~15% vs. typical 600mV Schottky, improving full-load efficiency by 0.4–0.6%. | Use Scenario: 24V input, 5V/3A regulated output in programmable logic controller (PLC) power stages. IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter; handles continuous 3A load with transient surges. Use Value: 45A IFSM and +150°C rating ensure reliability during motor-start surges and enclosure temperature excursions. |
| Automotive Body Control Module (BCM) | USB-C PD Adapter Secondary Side |
Use Scenario: 12V-to-5V/3.3V conversion in AEC-Q101-compliant BCMs with extended temperature requirements. IC Role / Device Role / Timing Role: Freewheeling diode in buck-derived auxiliary supply; operates continuously at TA = +105°C. Use Value: 400µA IR at 40V/25°C and <1mA at 125°C maintains low quiescent current, preserving battery life in sleep mode. | Use Scenario: Compact 65W USB-C PD adapter using active clamp flyback topology. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in high-frequency (100–300kHz) secondary winding. Use Value: 12ns tRR and soft recovery minimize ringing and enable stable regulation without snubbers, reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT3A40S-13 | Same VRRM/IO, but 550mV VF(max) at 3A; 500µA IR at 40V/25°C; no AEC-Q101 variant available | Lacks automotive qualification path; slightly higher conduction loss and leakage | Select when cost sensitivity outweighs need for lowest VF or automotive compliance |
| SS34-HF | 3A/40V Schottky; 550mV VF(max); 500µA IR at 25°C but >10× higher IR at 125°C; RθJA = 130°C/W | Higher thermal resistance and temperature-dependent leakage limit high-temp reliability | Acceptable for consumer-grade, low-ambient applications where cost is primary driver |
Compared with SBRT3A40S-13 and SS34-HF, the SBR3A40SA-13 offers the lowest VF at full load, best high-temperature leakage performance, and a qualified automotive variant-making it optimal for thermally constrained, high-reliability, or automotive-adjacent designs.
Availability
SBR3A40SA-13 is available at Aetrix Electronics and suitable for server SMPS, industrial DC-DC converters, and USB-C PD adapters requiring stable component supply, RoHS/Green compliance, and consistent tape-and-reel delivery.
Supply support for SBR3A40SA-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, serving industrial, computing, communications, and automotive markets with high-reliability components.
The SBR® Super Barrier Rectifier product line was developed to bridge the performance gap between Schottky and PN rectifiers-delivering low VF, low IR, soft recovery, and high-temperature operation for next-generation power conversion.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The SBR3A40SA-13 is rated for continuous operation up to +150°C junction temperature. Derating begins above +25°C ambient per Fig. 5, with full 3A current supported up to +75°C ambient on a standard FR-4 PCB with 2oz copper and recommended pad layout.
Is the SBR3A40SA-13 suitable for automotive applications?
The base SBR3A40SA-13 is not AEC-Q101 qualified; however, the pin- and form-compatible SBR3A40SAQ-13 variant is fully qualified, PPAP-capable, and manufactured in IATF 16949-certified facilities-making it suitable for automotive body electronics and infotainment power supplies.
How does the SBR3A40SA-13 compare to standard Schottky diodes in EMI performance?
Its patented SBR® structure provides softer reverse recovery than standard Schottkys, resulting in lower di/dt-induced voltage spikes and reduced high-frequency EMI. Measured tRR is 12ns with controlled tail current, enabling cleaner switching waveforms without added snubbers in 100–500kHz converters.
What is the recommended PCB pad layout for optimal thermal performance?
Diodes specifies a minimum pad layout per their SMA outline: 4.00mm × 1.70mm cathode pad with 2.50mm × 6.50mm thermal relief extension. Use 2oz copper on FR-4; thermal vias under the cathode pad improve RθJA by up to 30%, supporting higher sustained current in compact layouts.
SBR3A40SA-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:
- 500 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 400 µA @ 40 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR3A40SA-13 FAQ
1.How can I place an order for SBR3A40SA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR3A40SA-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 SBR3A40SA-13 reliable?
The price and inventory of SBR3A40SA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR3A40SA-13 is usually 5 days.
3.What payment methods are accepted for SBR3A40SA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR3A40SA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR3A40SA-13?
SBR3A40SA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR3A40SA-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 SBR3A40SA-13?
For technical support, including SBR3A40SA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR3A40SA-13 requirements.
6.How does Aetrix verify that SBR3A40SA-13 is sourced from the original manufacturer or authorized distributors?
All SBR3A40SA-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 SBR3A40SA-13 meets industry standards.
7.What is the process for return or replacement of SBR3A40SA-13?
All SBR3A40SA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBR3A40SA-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 SBR3A40SA-13 part is unused and in its original packaging.
Return procedure for SBR3A40SA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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