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Diodes Incorporated SBRT3U45SAF-13
- Part No.:
- SBRT3U45SAF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SBRT3U45SAF-13.pdf
- Description:
- DIODE SBR 45V 3A SMAF
- Quantity:
- Payment:
- Shipping:
Inventory:8,329
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Product details
Overview
SBRT3U45SAF-13 from Diodes Incorporated is a 3A, 45V Trench Super Barrier Rectifier in SMAF package, featuring ultra-low 0.48 V forward voltage at 3 A and 25°C, 0.15 mA max reverse leakage at 45 V/125°C, and thermal resistance RθJA of 63°C/W. It serves as a high-efficiency boost diode in DC-DC converters for industrial power supplies.
For engineers reviewing the SBRT3U45SAF-13 datasheet, SBRT3U45SAF-13 pinout, SBRT3U45SAF-13 application, or SBRT3U45SAF-13 equivalent, key selection criteria include forward voltage stability across temperature, reverse leakage performance at 125°C, thermal derating behavior, and RoHS-compliant green packaging compatibility with automated SMT assembly.
Technical Context
This TrenchSBR rectifier uses proprietary trench-based super barrier technology to achieve lower VF than standard Schottky diodes while maintaining superior high-temperature IR stability versus conventional PN junction devices. Its 45 V VRRM rating targets mid-voltage DC-DC stages where efficiency and thermal margin are critical.
The device operates across –55°C to +150°C junction temperature range with 50 A non-repetitive surge capability (8.3 ms half-sine), enabling robustness in transient-prone power rails. Its SMAF package supports high-density layouts with 0.064 g mass and UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in boost/buck output rectification. |
| IO | 3 A - Average rectified current at 25°C ambient; derates to ~2.4 A at 100°C per Figure 5. |
| VF (max) | 0.48 V @ 3 A, 25°C - Enables <1.44 W conduction loss at full load; reduces heatsink requirements. |
| IR (max) | 0.15 mA @ 45 V, 125°C - Low leakage preserves efficiency and prevents thermal runaway in high-temp environments. |
| RθJA | 63°C/W - Thermal resistance on FR-4 board (0.4"×0.5", 2 oz Cu); determines junction rise under steady-state power dissipation. |
| Package | SMAF - Low-profile surface-mount package (4.60 × 3.95 × 1.10 mm) with matte tin-plated copper leadframe. |
Pinout & Package
SMAF package: single-ended anode-cathode configuration with cathode band marking. Molded plastic case, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal | Connected to input/source side in forward-biased rectification; requires low-inductance trace routing. |
| Cathode | Current exit terminal | Marked with band; ties to output/load node; carries full IO current and must handle peak switching transients. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low VF | 0.48 V max at 3 A/25°C - Reduces conduction loss by ≥15% vs. comparable Schottky diodes, improving converter efficiency. |
| High-temp IR stability | 0.15 mA max at 45 V/125°C - Limits thermal runaway risk in enclosed or high-ambient environments. |
| Green construction | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb); RoHS 2 compliant with matte tin finish. |
| Robust surge rating | 50 A IFSM (8.3 ms half-sine) - Withstands inrush and fault currents without degradation in 12 V–48 V systems. |
Applications
| Boost Diode in 24 V DC-DC Converters | Blocking Diode in Solar Charge Controllers |
|---|---|
Use Scenario: Used in continuous-conduction-mode boost stage converting 12–24 V input to 48 V output for telecom power systems. IC Role / Device Role / Timing Role: Power rectifier conducting during switch-off phase; handles full output current with minimal voltage drop. Use Value: 0.48 V VF reduces power loss by ~0.7 W vs. legacy Schottky, lowering thermal stress on PCB layout. |
Use Scenario: Prevents battery discharge through PV panel at night in off-grid solar installations. IC Role / Device Role / Timing Role: Unidirectional blocking element placed between panel and charge controller; sustains 45 V reverse bias continuously. Use Value: 0.15 mA IR at 125°C minimizes standby energy loss, extending battery runtime in hot climates. |
| Recirculating Diode in Industrial Motor Drivers | Output Rectifier in AC-DC Adapters |
Use Scenario: Freewheeling path for inductive kickback in 24 V brushed DC motor H-bridge drivers. IC Role / Device Role / Timing Role: Clamps inductive flyback voltage during PWM turn-off; conducts brief high-current pulses. Use Value: 50 A IFSM withstands repeated 30 A transient spikes without bond-wire failure. |
Use Scenario: Secondary-side rectification in 36 W universal-input AC-DC adapters for IoT gateways. IC Role / Device Role / Timing Role: High-frequency rectifier operating at 65–100 kHz switching frequency; replaces fast recovery diodes. Use Value: SMAF footprint enables compact transformer-secondary layout; 63°C/W RθJA allows natural convection cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SBRT3U45S-13 | Same die, but in standard SMA (not SMAF); 0.1 mm taller (1.2 mm vs. 1.1 mm max height). | Less suitable for ultra-low-profile designs; identical electrical specs and thermal performance on equivalent board layout. | Select when existing SMA footprint is fixed and height constraint is relaxed. |
| PS3445L-13 | 45 V, 3 A Schottky; VF = 0.52 V max @ 3 A/25°C, but IR = 0.5 mA @ 45 V/125°C - 3.3× higher leakage. | Acceptable in moderate-temperature environments; unsuitable for sealed enclosures above 85°C ambient. | Choose only if cost sensitivity outweighs thermal reliability requirements. |
Compared with SBRT3U45SAF-13, SBRT3U45S-13 offers identical performance in a slightly taller package, while PS3445L-13 trades higher leakage for broader distributor availability - making the -SAF variant optimal for thermally demanding, space-constrained rectification.
Availability
SBRT3U45SAF-13 is available at Aetrix Electronics and suitable for industrial power supplies, solar charge controllers, motor drive recirculation paths, and AC-DC adapter designs requiring stable component supply and long-term manufacturability.
Supply support for SBRT3U45SAF-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 TrenchSBR product line delivers high-efficiency rectification for mid-voltage power conversion, targeting applications where Schottky leakage and PN diode VF trade-offs limit system efficiency and thermal design margins.
FAQ
What is the maximum junction temperature for continuous operation?
The SBRT3U45SAF-13 has a specified operating junction temperature range of –55°C to +150°C. Continuous operation at 150°C is permitted provided thermal design maintains TJ ≤ 150°C under worst-case IO and ambient conditions, verified using RθJA = 63°C/W and measured power dissipation.
Is this diode suitable for synchronous rectification circuits?
No - the SBRT3U45SAF-13 is a passive unidirectional rectifier and lacks gate control or bidirectional conduction capability. It functions only as a freewheeling or output rectifier in non-synchronous topologies; synchronous designs require actively switched MOSFETs with driver circuitry.
How does the SMAF package differ electrically from standard SMA?
Electrically, SMAF and SMA share identical die, bonding, and terminal materials - no parameter differences exist. The SMAF variant features reduced height (max 1.10 mm vs. 2.20 mm for SMA) and tighter dimensional tolerances, enabling thinner PCB assemblies without altering VF, IR, or thermal resistance values.
Does the "Green" designation impact soldering profile or reflow compatibility?
No - the halogen- and antimony-free molding compound and matte tin finish comply with J-STD-020 Class 1 moisture sensitivity and support standard Pb-free reflow profiles (peak 260°C). No special prebake or profile adjustments are required beyond standard IPC-J-STD-020 guidelines.
SBRT3U45SAF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-221AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 150 µA @ 45 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -55°C ~ 150°C
SBRT3U45SAF-13 FAQ
1.How can I place an order for SBRT3U45SAF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SBRT3U45SAF-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 SBRT3U45SAF-13 reliable?
The price and inventory of SBRT3U45SAF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBRT3U45SAF-13 is usually 5 days.
3.What payment methods are accepted for SBRT3U45SAF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBRT3U45SAF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBRT3U45SAF-13?
SBRT3U45SAF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBRT3U45SAF-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 SBRT3U45SAF-13?
For technical support, including SBRT3U45SAF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBRT3U45SAF-13 requirements.
6.How does Aetrix verify that SBRT3U45SAF-13 is sourced from the original manufacturer or authorized distributors?
All SBRT3U45SAF-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 SBRT3U45SAF-13 meets industry standards.
7.What is the process for return or replacement of SBRT3U45SAF-13?
All SBRT3U45SAF-13 units undergo pre-shipment inspection (PSI). If there is an issue with SBRT3U45SAF-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 SBRT3U45SAF-13 part is unused and in its original packaging.
Return procedure for SBRT3U45SAF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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