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Diodes Incorporated SDT5A50SA-13
- Part No.:
- SDT5A50SA-13
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SDT5A50SA-13.pdf
- Description:
- DIODE SCHOTTKY 50V 5A SMA
- Quantity:
- Payment:
- Shipping:
Inventory:4,861
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Product details
Overview
SDT5A50SA from Diodes Incorporated is a 5A, 50V Trench Schottky barrier rectifier in SMA package, featuring 0.44 V forward voltage at 5 A and 25°C, 300 µA reverse leakage at 50 V/25°C, and +150°C maximum junction temperature - deployed as freewheeling diode in high-efficiency DC-DC converters.
For engineers reviewing the SDT5A50SA datasheet, SDT5A50SA pinout, SDT5A50SA application, or SDT5A50SA equivalent, key selection criteria include low VF for conduction loss reduction, soft switching behavior for EMI control, thermal robustness up to 150°C, and RoHS-compliant lead-free plating suitable for reflow-soldered power stages.
Technical Context
This Schottky rectifier uses trench MOS structure to achieve lower forward voltage and reduced reverse recovery charge versus planar Schottky devices. Its soft, fast switching minimizes voltage overshoot during turn-off in inductive flyback paths.
Rated for 5 A average forward current with 50 A non-repetitive surge capability, it operates across –65°C to +150°C ambient, with thermal resistance of 65°C/W (junction-to-ambient on FR-4) and 25°C/W (junction-to-case), enabling compact PCB layouts in space-constrained SMPS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage without breakdown |
| IO | 5 A - Continuous average forward current rating at 25°C ambient |
| VF (max) | 0.52 V - Worst-case forward drop at 5 A/25°C, defining conduction loss in power path |
| IR (max) | 300 µA - Max reverse leakage at 50 V/25°C, critical for standby power budget |
| TJ(max) | +150°C - Maximum junction temperature, enabling operation in thermally demanding enclosures |
| RθJA | 65 °C/W - Thermal resistance on standard FR-4 board, used to calculate junction temp rise |
| IFSM | 50 A - Surge current handling for 8.3 ms half-sine, supporting inrush and fault transients |
Pinout & Package
SMA (DO-214AC) surface-mount package: molded green plastic case, UL 94V-0 rated, cathode band polarity indicator, matte tin–plated terminals, 0.064 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input current terminal | Connected to source side of switching node (e.g., MOSFET drain or inductor input) |
| Cathode | Output current terminal | Connected to output rail or return path; marked by visible cathode band |
Key Features
| Feature | Design Value |
|---|---|
| Trench Schottky architecture | Enables lower VF vs. planar Schottky, reducing I²R losses in high-current DC-DC outputs |
| Soft, fast switching | Minimizes voltage ringing and EMI during diode turn-off in flyback/freewheeling modes |
| +150°C operating junction temperature | Supports reliable operation in sealed or high-ambient industrial power supplies |
| Lead-free, halogen- and antimony-free | Meets RoHS 3 and JEDEC MSL Level 1 requirements for automated assembly and environmental compliance |
Applications
| SMPS Secondary Rectification | DC-DC Buck Converter Freewheeling |
|---|---|
Use Scenario: Used in secondary-side rectification of isolated flyback or forward converters delivering 5–24 V at up to 5 A. IC Role / Device Role / Timing Role: Uncontrolled rectifier conducting during transformer demagnetization phase. Use Value: 0.44 V VF at 5 A reduces conduction loss by ~15% versus comparable 0.5 V Schottky, improving full-load efficiency. | Use Scenario: Freewheeling path in synchronous or non-synchronous buck regulators powering FPGA core rails. IC Role / Device Role / Timing Role: Provides low-loss current path when high-side switch is off, sustaining inductor current continuity. Use Value: Soft switching behavior suppresses voltage spikes >10 V, eliminating need for snubbers in 12 V input designs. |
| AC-DC Adapter Output Stage | Industrial Motor Drive Auxiliary Supply |
Use Scenario: Final rectification stage in universal-input (90–264 VAC) offline adapters for consumer electronics. IC Role / Device Role / Timing Role: Converts transformer secondary AC to regulated DC output; operates at 50/60 Hz line frequency. Use Value: 300 µA IR at 25°C ensures <15 µW standby leakage, meeting DOE Level VI efficiency requirements. | Use Scenario: Output rectifier in auxiliary 15 V/1 A isolated supply powering gate drivers and logic in 3-phase inverters. IC Role / Device Role / Timing Role: Delivers stable bias voltage under variable load and elevated ambient (up to 85°C). Use Value: +150°C TJ rating allows derated operation at 125°C ambient without thermal shutdown, ensuring reliability in enclosed cabinets. |
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 5 A/50 V rating but planar Schottky; VF = 0.55 V (max) at 5 A/25°C; higher IR = 500 µA | Higher conduction loss and leakage reduce efficiency in high-duty-cycle or low-standby designs | Prefer SDT5A50SA where <0.5 V VF and <300 µA IR are required for efficiency-critical outputs |
| MBR550 | 5 A/50 V, DO-214AA (SMB) package; VF = 0.57 V (max); RθJA = 50°C/W on larger pad | Larger footprint and higher VF increase board area and thermal stress in dense layouts | Choose SDT5A50SA for space-constrained designs needing SMA footprint and superior thermal performance per mm² |
Compared with SS5P5 and MBR550, SDT5A50SA delivers lower forward voltage and tighter leakage control in a smaller SMA package, making it optimal for high-density, high-efficiency DC-DC and adapter outputs where thermal and electrical performance margins are constrained.
Availability
SDT5A50SA is available at Aetrix Electronics and suitable for SMPS secondary rectification, DC-DC buck converter freewheeling, and AC-DC adapter output stages requiring stable component supply and RoHS-compliant manufacturing.
Supply support for SDT5A50SA 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.
The SDT5A50SA belongs to Diodes' Trench Schottky rectifier product line, engineered specifically for high-efficiency, low-VF power conversion in space- and thermally-constrained applications.
FAQ
What is the maximum allowable junction temperature for SDT5A50SA?
The SDT5A50SA has a maximum junction temperature (TJ) rating of +150°C, verified per its absolute maximum ratings table. This enables operation in high-ambient environments such as enclosed industrial power supplies, provided thermal design maintains TJ ≤ 150°C using the specified RθJA of 65°C/W on FR-4.
Does SDT5A50SA have a cathode marking, and how is polarity identified?
Yes - SDT5A50SA features a visible cathode band on the SMA package body, consistent with industry-standard polarity marking. The cathode terminal is the banded end; no additional notch or dot marking is required, and the band aligns with the cathode symbol in the device outline drawing.
Is SDT5A50SA suitable for use in automotive applications?
SDT5A50SA is not AEC-Q200 qualified and lacks automotive-specific qualification data (e.g., HTOL, temperature cycling). While its +150°C TJ rating supports under-hood ambient conditions, Diodes Incorporated does not recommend or warrant its use in automotive safety-critical systems without additional customer validation.
What is the moisture sensitivity level (MSL) for SDT5A50SA?
The SDT5A50SA is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at ≤30°C/60% RH and requires no baking prior to reflow soldering - simplifying SMT assembly and reducing process overhead in high-volume manufacturing.
SDT5A50SA-13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- 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:
- SMA
- Operating Temperature - Junction:
- -65°C ~ 150°C
SDT5A50SA-13 FAQ
1.How can I place an order for SDT5A50SA-13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SDT5A50SA-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 SDT5A50SA-13 reliable?
The price and inventory of SDT5A50SA-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDT5A50SA-13 is usually 5 days.
3.What payment methods are accepted for SDT5A50SA-13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDT5A50SA-13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDT5A50SA-13?
SDT5A50SA-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDT5A50SA-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 SDT5A50SA-13?
For technical support, including SDT5A50SA-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDT5A50SA-13 requirements.
6.How does Aetrix verify that SDT5A50SA-13 is sourced from the original manufacturer or authorized distributors?
All SDT5A50SA-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 SDT5A50SA-13 meets industry standards.
7.What is the process for return or replacement of SDT5A50SA-13?
All SDT5A50SA-13 units undergo pre-shipment inspection (PSI). If there is an issue with SDT5A50SA-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 SDT5A50SA-13 part is unused and in its original packaging.
Return procedure for SDT5A50SA-13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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