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Diodes Incorporated SBR3U20SA-13
- Part No.:
- SBR3U20SA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SBR3U20SA-13.pdf
- Description:
- DIODE SBR 20V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:19,442
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Product details
Overview
SBR3U20SA-13 from Diodes Incorporated is a 20 V, 3.0 A surface-mount Super Barrier Rectifier in SMA package, featuring ultra-low forward voltage (0.26–0.39 V at 0.5–3.0 A), soft fast switching, and 150°C junction operation-designed for high-efficiency freewheeling and output rectification in DC-DC converters and SMPS.
For engineers reviewing the SBR3U20SA-13 datasheet, SBR3U20SA-13 pinout, SBR3U20SA-13 application, or SBR3U20SA-13 equivalent, key selection criteria include forward voltage at 3.0 A, reverse leakage at 125°C, thermal resistance (RθJA = 97°C/W on polyimide PCB), and RoHS/halogen-free compliance for industrial power designs.
Technical Context
This Super Barrier Rectifier uses patented epitaxial barrier technology to achieve lower VF than Schottky diodes while maintaining higher reverse blocking capability and superior temperature stability. Its soft recovery minimizes EMI in high-frequency switching topologies.
Rated for 20 V repetitive reverse voltage and 66 A non-repetitive surge current, it operates reliably across –65°C to +150°C with low thermal resistance to ambient (97°C/W) on optimized polyimide PCB layouts-enabling compact, thermally robust power stage designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum DC blocking voltage before breakdown; sets upper limit for input/output rail voltage in buck or flyback secondary-side rectification |
| IO (AV) | 3.0 A - Continuous average forward current at TA = +25°C; derates to ~2.0 A at +100°C per Fig.5 |
| VF @ 3.0A | 0.33 V (TJ = +25°C), 0.39 V (TJ = +125°C) - Directly determines conduction loss and thermal rise in high-current paths |
| IR @ 20V | 500 µA @ +25°C, 100 µA @ +125°C - Low leakage preserves efficiency in standby and light-load conditions |
| TJ max | +150°C - Enables operation in sealed or high-ambient environments without forced cooling |
| RθJA | 97°C/W (polyimide PCB) - Defines thermal headroom for 3.0 A operation under natural convection |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with cathode band polarity indicator; dimensions per AP02002 (A=2.29–2.92 mm, B=4.00–4.60 mm, E=4.80–5.59 mm); weight ≈ 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to switch node (e.g., MOSFET drain) in freewheeling path or low-side of output rectifier |
| Cathode | Current exit point during forward conduction; marked with band | Connected to output rail or ground return; serves as thermal interface to PCB copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.26 V at 0.5 A / +25°C - reduces conduction loss by >30% vs. standard Schottky diodes in same package |
| Soft switching | Low reverse recovery charge (Qrr not specified but implied by "soft, fast switching" in datasheet) - suppresses voltage spikes and EMI in MHz-range converters |
| 150°C TJ rating | Enables full 3.0 A current capability in enclosed industrial enclosures up to +85°C ambient |
| Halogen & antimony free | <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - meets IPC-1752A Tier 1 green material reporting requirements |
Applications
| SMPS Secondary Rectification | DC-DC Converter Freewheeling |
|---|---|
Use Scenario: Output rectification in isolated flyback or forward converters delivering 5–12 V at up to 3 A. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during transformer reset phase. Use Value: 0.33 V VF at 3 A cuts conduction loss to ~1.0 W-reducing heatsink need and improving full-load efficiency by ≥1.2% vs. 0.45 V Schottky. | Use Scenario: Freewheeling path in synchronous or non-synchronous buck converters powering FPGA core rails. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path when high-side switch turns off; critical for maintaining continuous inductor current. Use Value: Soft recovery limits VDS spike on high-side MOSFET, enabling use of 30 V-rated devices instead of 40 V-reducing RDS(on) and gate drive loss. |
| USB-C Power Delivery Output Stage | Industrial PLC Power Supply Input Protection |
Use Scenario: Secondary-side rectification in 20 V/3 A USB PD 3.0 adapter designs. IC Role / Device Role / Timing Role: High-current, low-VF rectifier handling peak 3 A loads during PD negotiation bursts. Use Value: 150°C TJ rating ensures reliability under sustained 3 A load in compact adapters; RoHS/Green compliance satisfies EU market access requirements. | Use Scenario: Reverse-polarity protection and input rectification in 24 V DC industrial PLC power modules. IC Role / Device Role / Timing Role: Blocks reverse input connection while conducting forward current; withstands 66 A surge from inductive load dump events. Use Value: 66 A IFSM rating provides margin against 50 A transients per IEC 61000-4-5; lead-free plating ensures solder joint integrity in reflow profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT3U20SA-13 | Same die, identical electrical specs; differs only in tape-and-reel packaging (SBR3U20SA-13: 5000/reel; SBRT3U20SA-13: 3000/reel) | No functional difference; used interchangeably where reel size affects pick-and-place setup | Select based on production line feeder compatibility and minimum order quantity constraints |
| MBR320LSFT1G | Higher VF (0.45 V @ 3 A), higher IR (1 mA @ 125°C), same 20 V/3 A rating and SMA package | Acceptable where 150°C operation or lowest possible conduction loss is not required | Choose only if cost sensitivity outweighs efficiency and thermal performance targets |
Compared with SBRT3U20SA-13, SBR3U20SA-13 offers identical performance with larger reel count; versus MBR320LSFT1G, it delivers 0.12 V lower VF at 3 A-reducing power loss by 360 mW and enabling 10°C lower junction temperature under identical conditions.
Availability
SBR3U20SA-13 is available at Aetrix Electronics and suitable for SMPS secondary rectification, DC-DC converter freewheeling, and industrial PLC power supply input protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SBR3U20SA-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-performance power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
The SBR® Super Barrier Rectifier product line was developed to replace conventional Schottky diodes in high-efficiency, high-temperature power conversion-delivering lower VF, higher TJ, and softer recovery in standard surface-mount packages.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The SBR3U20SA-13 is rated for continuous operation up to +150°C junction temperature. This enables full 3.0 A current capability in ambient temperatures up to +85°C when mounted on a polyimide PCB with recommended pad layout (RθJA = 97°C/W). Derating curves in Figure 5 confirm usable current remains above 2.0 A at +100°C ambient.
Is this device suitable for synchronous rectification replacement?
No-SBR3U20SA-13 is a passive unidirectional rectifier and cannot replace active synchronous rectifiers (e.g., MOSFETs with gate drivers). It functions as a high-efficiency alternative to Schottky diodes in non-synchronous topologies, offering lower VF and better thermal stability but no controllability or reverse conduction capability.
Does the cathode band indicate pin 1 or polarity orientation?
The cathode band marks the cathode terminal-not pin 1-and indicates the direction of forward current flow (anode to cathode). In SMA package orientation, the band is located at the cathode end; the opposite end is the anode. This marking aligns with JEDEC DO-214AC standard and must be matched to PCB silkscreen polarity indicators during layout.
How does its soft switching behavior impact EMI in high-frequency converters?
Soft switching reduces reverse recovery dv/dt and eliminates current tailing, minimizing high-frequency ringing and conducted EMI. Measured data in Figure 2 shows near-zero reverse recovery charge (Qrr), allowing operation up to 1 MHz in buck converters without added snubbers-reducing BOM count and board space versus standard Schottky diodes with abrupt recovery.
SBR3U20SA-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):
- 20 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 390 mV @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
SBR3U20SA-13 FAQ
1.How can I place an order for SBR3U20SA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR3U20SA-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 SBR3U20SA-13 reliable?
The price and inventory of SBR3U20SA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR3U20SA-13 is usually 5 days.
3.What payment methods are accepted for SBR3U20SA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR3U20SA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR3U20SA-13?
SBR3U20SA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR3U20SA-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 SBR3U20SA-13?
For technical support, including SBR3U20SA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR3U20SA-13 requirements.
6.How does Aetrix verify that SBR3U20SA-13 is sourced from the original manufacturer or authorized distributors?
All SBR3U20SA-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 SBR3U20SA-13 meets industry standards.
7.What is the process for return or replacement of SBR3U20SA-13?
All SBR3U20SA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBR3U20SA-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 SBR3U20SA-13 part is unused and in its original packaging.
Return procedure for SBR3U20SA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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