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Diodes Incorporated SBRT3U45SAQ-13
- Part No.:
- SBRT3U45SAQ-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SBRT3U45SAQ-13.pdf
- Description:
- DIODE SBR 45V 3A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:3,742
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Product details
Overview
SBRT3U45SAQ-13 from Diodes Incorporated is a 3A, 45V Trench Super Barrier Rectifier (SBR®) in SMA package, featuring ultra-low 0.48V max forward voltage at 3A/25°C, 0.15mA max reverse leakage at 45V/25°C, and AEC-Q101 qualification for automotive use. It serves as a high-efficiency boost or blocking diode in DC-DC converters and power supplies.
For engineers reviewing the SBRT3U45SAQ-13 datasheet, SBRT3U45SAQ-13 pinout, SBRT3U45SAQ-13 application, or SBRT3U45SAQ-13 equivalent, key selection criteria include forward voltage stability across temperature, reverse leakage performance at 125°C, thermal resistance (RθJA = 66°C/W), and AEC-Q101 compliance for under-hood automotive designs.
Technical Context
This SBR device uses patented trench-based super barrier technology to achieve lower VF than standard Schottky diodes while maintaining superior high-temperature IR stability. Its 45V VRRM rating and 50A IFSM surge capability support robust operation in transient-prone automotive power rails.
The SMA package enables compact layout with low thermal resistance (RθJC = 30°C/W) and supports automated assembly. Polarity is marked by cathode band; terminals feature matte tin annealed over copper leadframe per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for blocking applications like boost converter output stage. |
| IO | 3 A - Continuous average rectified current; defines steady-state power handling in 60Hz half-wave resistive loads. |
| VF (max) | 0.48 V @ 3A, 25°C - Directly determines conduction loss and thermal rise in high-current paths. |
| IR (max) | 0.15 mA @ 45V, 25°C - Low leakage ensures minimal standby power loss and thermal runaway immunity. |
| RθJA | 66 °C/W - Junction-to-ambient thermal resistance on FR-4 board; used to calculate junction temperature rise under load. |
| TJ Range | −55 to +150 °C - Full operating junction temperature range; validated for under-hood automotive environments. |
| AEC-Q101 | Qualified - Confirmed reliability for automotive electronics per stress test requirements including HTGB, HTRB, and TCT. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case with cathode band polarity marking. Dimensions: 4.60 × 2.92 × 1.63 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to source side (e.g., switch node in boost topology); requires thermal pad design for heat dissipation. |
| Cathode | Current exit point during forward conduction; marked with band | Connected to output rail or ground return; polarity must be verified during PCB layout to prevent reverse bias failure. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF (0.48V max @ 3A) | Reduces conduction loss by >30% vs. standard Schottky diodes, directly improving efficiency in 12V input DC-DC stages. |
| Low IR at high temperature (40μA @ 45V/125°C) | Enables stable operation in engine compartment environments without thermal runaway risk. |
| AEC-Q101 qualification | Validates reliability for automotive power modules, eliminating need for additional qualification testing by Tier-1 suppliers. |
| RoHS 3 & "Green" compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb - required for global automotive OEM sourcing. |
Applications
| Boost Diode | Blocking Diode |
|---|---|
Use Scenario: Used in automotive 12V-to-48V bidirectional DC-DC converters to enable regenerative braking energy transfer. IC Role / Device Role / Timing Role: Unidirectional current path enabling high-efficiency voltage step-up with minimal forward loss. Use Value: 0.48V VF reduces power loss by ~1.4W at 3A versus typical 0.7V Schottky, lowering heatsink requirements. | Use Scenario: Isolates battery backup from main supply in ADAS domain controllers during cold-crank events. IC Role / Device Role / Timing Role: Prevents reverse current flow from backup rail into primary system during undervoltage conditions. Use Value: 0.15mA IR at 25°C and 40μA at 125°C ensures negligible standby drain, extending backup runtime. |
| Recirculating Diode | Automotive Lighting Supply |
Use Scenario: Freewheeling path for inductive loads such as fuel injector drivers in engine control units. IC Role / Device Role / Timing Role: Provides low-loss current recirculation during MOSFET turn-off to suppress voltage spikes. Use Value: 50A IFSM withstands peak inductive kickback without degradation, ensuring long-term reliability. | Use Scenario: Output rectifier in LED headlamp constant-current drivers operating at ambient up to 125°C. IC Role / Device Role / Timing Role: Converts switched AC-like waveform from controller into stable DC for LED string. Use Value: Stable VF and IR across −40°C to +150°C TJ enables consistent light output without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT3U45T3G | Same die, but in SMC (DO-214AB) package; RθJA = 40°C/W, higher current rating margin. | Better thermal performance in high-power layouts; requires larger PCB footprint. | Select when board space allows and junction temperature must stay below 130°C at 3A continuous. |
| SS34H | Standard Schottky; VF = 0.55V max @ 3A, IR = 0.5mA @ 45V/25°C, no AEC-Q101 qualification. | Limited to non-automotive industrial use; higher conduction loss and leakage at elevated temperature. | Acceptable only for cost-sensitive consumer applications where AEC-Q101 and high-temp IR are not required. |
Compared with SBRT3U45T3G, the SBRT3U45SAQ-13 offers smaller footprint and automotive qualification but higher thermal resistance; versus SS34H, it delivers lower VF, tighter IR control, and certified automotive reliability-critical for safety-critical power paths.
Availability
SBRT3U45SAQ-13 is available at Aetrix Electronics and suitable for automotive power conversion, ADAS domain controllers, and LED lighting systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SBRT3U45SAQ-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-efficiency, high-reliability rectifiers optimized for automotive and industrial power conversion where low VF and stable high-temperature IR are critical.
FAQ
Is SBRT3U45SAQ-13 suitable for synchronous rectification?
No. SBRT3U45SAQ-13 is a unidirectional, passive rectifier with fixed anode–cathode polarity. It lacks gate control and cannot replace MOSFETs in synchronous rectifier topologies. Its function is limited to freewheeling, boost, or blocking roles in non-synchronous switching converters.
What is the maximum allowable PCB copper pad size for thermal performance?
The datasheet specifies a 0.2" × 0.25" (5.08 mm × 6.35 mm) copper pad on FR-4 for the RθJA = 66°C/W rating. Increasing pad area beyond this improves thermal performance marginally, but does not change the specified RθJA value unless re-characterized per JEDEC standards.
Does the "-13" suffix indicate tape-and-reel packaging?
Yes. The "-13" suffix denotes 5000-piece tape-and-reel packaging per the Diodes ordering information table. This format is compatible with standard SMT pick-and-place equipment and supports automated high-volume assembly.
Can SBRT3U45SAQ-13 replace a standard 1N5822 in existing designs?
Yes, with validation. SBRT3U45SAQ-13 matches 1N5822's 3A/40V rating but offers lower VF (0.48V vs. 0.55V) and superior high-temp IR. However, SMA package differs from DO-201AD; mechanical fit, thermal pad layout, and solder profile must be verified before drop-in replacement.
SBRT3U45SAQ-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- TrenchSBR
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Super Barrier
- Voltage - DC Reverse (Vr) (Max):
- 45 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:
- 150 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMA
- Operating Temperature - Junction:
- -55°C ~ 150°C
SBRT3U45SAQ-13 FAQ
1.How can I place an order for SBRT3U45SAQ-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBRT3U45SAQ-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 SBRT3U45SAQ-13 reliable?
The price and inventory of SBRT3U45SAQ-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBRT3U45SAQ-13 is usually 5 days.
3.What payment methods are accepted for SBRT3U45SAQ-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBRT3U45SAQ-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBRT3U45SAQ-13?
SBRT3U45SAQ-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBRT3U45SAQ-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 SBRT3U45SAQ-13?
For technical support, including SBRT3U45SAQ-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBRT3U45SAQ-13 requirements.
6.How does Aetrix verify that SBRT3U45SAQ-13 is sourced from the original manufacturer or authorized distributors?
All SBRT3U45SAQ-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 SBRT3U45SAQ-13 meets industry standards.
7.What is the process for return or replacement of SBRT3U45SAQ-13?
All SBRT3U45SAQ-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBRT3U45SAQ-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 SBRT3U45SAQ-13 part is unused and in its original packaging.
Return procedure for SBRT3U45SAQ-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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