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Diodes Incorporated SDT5A50SAF-13
- Part No.:
- SDT5A50SAF-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA Flat Leads
- Datasheet:
-
SDT5A50SAF-13.pdf
- Description:
- SCHOTTKY RECTIFIER SMAF T&R 5K
- Quantity:
- Payment:
- Shipping:
Inventory:2,105
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Product details
Overview
SDT5A50SAF-13 from Diodes Incorporated is a 5.0A, 50V trench Schottky barrier rectifier in SMAF package, featuring 0.52V max forward voltage at 5A/25°C, 300µA max reverse leakage at 50V/25°C, and +150°C junction temperature rating-designed for high-efficiency freewheeling and reverse polarity protection in compact DC-DC converters.
For engineers reviewing the SDT5A50SAF-13 datasheet, SDT5A50SAF-13 pinout, SDT5A50SAF-13 application, or SDT5A50SAF-13 equivalent, key selection criteria include low VF for conduction loss reduction, soft switching behavior to minimize EMI in switching regulators, thermal robustness up to +150°C, RoHS-compliant lead-free plating, and SMAF footprint compatibility with space-constrained power stages.
Technical Context
This Schottky rectifier uses trench MOS structure to achieve lower forward voltage and reduced reverse recovery charge versus planar Schottky diodes. Its soft, fast switching capability minimizes voltage overshoot and ringing during turn-off in inductive load circuits such as synchronous buck freewheel paths.
The device operates across –65°C to +150°C junction temperature range with 28°C/W junction-to-case thermal resistance. It is rated for 50A non-repetitive surge current (8.3ms half-sine), enabling robust handling of transient overloads in SMPS input/output stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC output rectification and reverse polarity protection circuits |
| IO(AV) | 5 A - Average forward current rating at TA = +25°C; supports continuous operation in 12V/5A or 5V/5A secondary-side power rails |
| VF(max) | 0.52 V @ 5A, 25°C - Low conduction loss enables >95% efficiency in 5A-class buck converters at light-to-moderate loads |
| IR(max) | 300 µA @ 50V, 25°C - Ultra-low leakage preserves battery runtime in always-on reverse-blocking applications |
| TJ(max) | +150°C - Enables reliable operation in thermally constrained environments without derating below 5A up to +100°C ambient |
| RθJC | 28 °C/W - Efficient heat transfer to PCB copper pad; supports thermal design with minimal heatsinking in SMAF layout |
Pinout & Package
Package: SMAF (Surface-Mount Axial Flat) - molded plastic case, 4.00 mm × 2.50 mm footprint, cathode band polarity indicator, 0.036 g weight, UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to switch node or input rail in freewheeling path; low-resistance trench structure minimizes I²R loss |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to output rail or ground; withstands 50V reverse bias with <300µA leakage at 25°C |
Key Features
| Feature | Design Value |
|---|---|
| Soft, fast switching | Minimizes voltage overshoot and EMI generation during diode turn-off in high-frequency (>300 kHz) DC-DC converters |
| +150°C operating junction temperature | Enables full 5A current delivery in automotive cabin modules or industrial controllers without thermal derating up to +100°C ambient |
| Lead-free, halogen- and antimony-free "Green" construction | Complies with RoHS 3 (2015/863/EU) and automotive change control requirements when qualified per AEC-Q101 |
| Low IR at elevated temperature | Leakage remains ≤90 mA at VR = 50V and TJ = +125°C-critical for maintaining system standby power budget |
Applications
| SMPS Secondary Rectification | Reverse Polarity Protection |
|---|---|
Use Scenario: Output rectification in isolated flyback or forward converters delivering 5–12V/5A to embedded systems. IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting during transformer reset phase; replaces slower PN diodes to reduce conduction loss. Use Value: 0.52V VF at 5A cuts conduction loss by ~40% vs. comparable 1N5822, improving full-load efficiency by 1.2–1.8%. | Use Scenario: Input protection for USB-C PD adapters or PoE-powered devices exposed to accidental reverse connection. IC Role / Device Role / Timing Role: Series-blocking diode placed between connector and DC input rail; conducts only during correct polarity insertion. Use Value: 300µA IR at 25°C ensures <15µW standby loss, preserving battery life in always-connected IoT gateways. |
| DC-DC Buck Freewheeling | Blocking Diode in Solar Charge Controllers |
Use Scenario: Freewheel path in 500kHz synchronous buck regulator powering FPGA core voltage (e.g., 1.2V/5A). IC Role / Device Role / Timing Role: Provides low-loss current path during high-side FET off-time; soft switching suppresses ringing on sensitive analog supply rails. Use Value: Soft recovery reduces peak VDS stress on high-side MOSFET by up to 25%, lowering required voltage rating and cost. | Use Scenario: Blocking diode between photovoltaic panel and MPPT charge controller to prevent nighttime battery discharge. IC Role / Device Role / Timing Role: Unidirectional current valve isolating battery from panel at night; must sustain 50V reverse bias with minimal leakage. Use Value: 90mA IR at 50V/125°C ensures <450mW worst-case dissipation-enabling passive cooling in outdoor-rated enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SS5P5 | Same 5A/50V rating but SMC package (7.1mm × 6.2mm); VF = 0.55V @ 5A; RθJA = 40°C/W | Larger footprint; higher thermal resistance limits use in ultra-thin designs | Select when board space allows larger package and higher surge immunity (IFSM = 150A) is prioritized |
| SB550 | DO-201AD package; VF = 0.55V @ 5A; IR = 500µA @ 50V/25°C; TJ(max) = +125°C | Through-hole mounting; lower max junction temperature; higher leakage compromises low-power standby | Choose only for legacy through-hole assembly or where RoHS exemption for leaded finish is required |
Compared with SS5P5 and SB550, SDT5A50SAF-13 delivers superior thermal performance in minimal area (SMAF), lower leakage for energy-sensitive applications, and full +150°C operation-making it optimal for modern surface-mount, high-density power supplies where size, efficiency, and temperature margin are critical.
Availability
SDT5A50SAF-13 is available at Aetrix Electronics and suitable for SMPS secondary rectification, reverse polarity protection, and DC-DC buck freewheeling requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing traceability.
Supply support for SDT5A50SAF-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, consumer, and automotive markets with high-reliability, cost-optimized components.
SDT5A50SAF-13 belongs to Diodes' Trench Schottky Rectifier product line-engineered specifically for high-efficiency, high-frequency power conversion in space-constrained applications where low VF, soft switching, and extended temperature operation are mandatory.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The SDT5A50SAF-13 has a rated maximum junction temperature of +150°C. It maintains full 5A average forward current capability up to +100°C ambient temperature when mounted on a standard FR-4 PCB with specified 0.2" × 0.25" copper pad, per datasheet Figure 4 derating curve and thermal resistance data.
Does this part meet AEC-Q101 qualification for automotive use?
The SDT5A50SAF-13 is not pre-qualified to AEC-Q101. However, Diodes Incorporated states that automotive-grade versions with AEC-Q101 qualification, PPAP capability, and IATF 16949 manufacturing are available upon request-contact Diodes' automotive sales team for qualified alternatives with identical electrical specs and enhanced reliability testing.
How does the SMAF package compare thermally to SMA or SMC packages?
The SMAF package offers RθJC = 28°C/W, significantly lower than typical SMA (≈45°C/W) and closer to SMC (≈25°C/W). Its flat profile improves PCB thermal coupling, while its 4.0mm × 2.5mm footprint occupies ~40% less area than SMC-enabling better thermal performance per unit board area in dense layouts.
Can SDT5A50SAF-13 replace older Schottky diodes like 1N5822 in existing designs?
Yes-SDT5A50SAF-13 is a direct functional replacement for 1N5822 in SMA package with identical pinout and polarity marking. It improves VF by ~0.1V at 5A and lowers IR by 5×, reducing conduction loss and standby power. No layout change is needed, but verify thermal margin due to higher power density.
SDT5A50SAF-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA Flat Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 520 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 300 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMAF
- Operating Temperature - Junction:
- -65°C ~ 150°C
SDT5A50SAF-13 FAQ
1.How can I place an order for SDT5A50SAF-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT5A50SAF-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 SDT5A50SAF-13 reliable?
The price and inventory of SDT5A50SAF-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT5A50SAF-13 is usually 5 days.
3.What payment methods are accepted for SDT5A50SAF-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT5A50SAF-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT5A50SAF-13?
SDT5A50SAF-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT5A50SAF-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 SDT5A50SAF-13?
For technical support, including SDT5A50SAF-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT5A50SAF-13 requirements.
6.How does Aetrix verify that SDT5A50SAF-13 is sourced from the original manufacturer or authorized distributors?
All SDT5A50SAF-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 SDT5A50SAF-13 meets industry standards.
7.What is the process for return or replacement of SDT5A50SAF-13?
All SDT5A50SAF-13 units undergo pre-shipment inspection (PSI). If there is an issue with SDT5A50SAF-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 SDT5A50SAF-13 part is unused and in its original packaging.
Return procedure for SDT5A50SAF-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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