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Taiwan Semiconductor Corporation SRAS2050
- Part No.:
- SRAS2050
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SRAS2050.pdf
- Description:
- 20A, 50V, PLANAR SCHOTTKY
- Quantity:
- Payment:
- Shipping:
Inventory:8,152
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Product details
Overview
SRAS2050 from Taiwan Semiconductor is a 20 A, 50 V repetitive peak reverse voltage Schottky barrier rectifier in TO-263AB (D2PAK) package, optimized for high-efficiency switching mode power supplies and DC-DC converters with low forward voltage drop (0.70 V at 20 A, 25°C) and high surge capability (330 A, 8.3 ms).
For engineers reviewing the SRAS2050 datasheet, SRAS2050 pinout, SRAS2050 application, or SRAS2050 equivalent, this device serves as a surface-mount, single-die Schottky rectifier requiring thermal management due to its 1.5 °C/W junction-to-case resistance and operating up to +150°C junction temperature.
Technical Context
The SRAS2050 is a unidirectional, single-die Schottky rectifier with anode-cathode polarity marked on the case. Its 50 V VRRM rating supports mid-voltage DC-DC stages where low conduction loss is critical, and its 330 A IFSM enables robust handling of transient inrush currents in adapter and SMPS front-end designs.
Thermally, it relies on PCB copper area for heat dissipation via the exposed cathode tab in the TO-263AB package. Reverse leakage is specified at ≤500 µA at 25°C and ≤10 mA at 100°C - a key trade-off versus higher-voltage variants in the SRAS20xx family.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - Maximum repetitive reverse blocking voltage; defines usable input/output voltage range in buck, flyback, or OR-ing applications |
| IF | 20 A - Continuous average forward current at case temperature ≤ 110°C; sets minimum trace width and heatsinking requirements |
| VF | 0.70 V max @ 20 A, 25°C - Directly determines conduction loss (14 W at full load); lower than silicon diodes enabling >90% efficiency in compact SMPS |
| IFSM | 330 A @ 8.3 ms - Enables survival of cold-start surges without derating; critical for universal-input AC/DC adapters |
| RθJC | 1.5 °C/W - Quantifies thermal path from junction to case; requires ≥4 cm² 2-oz copper pad for safe 20 A operation at 150°C TJ |
| TJ max | +150°C - Maximum allowable junction temperature; constrains ambient + power loss design margin in enclosed enclosures |
| IR @ 25°C | ≤500 µA - Low leakage preserves standby power in energy-efficient designs compliant with Level VI or CoC v5 |
Pinout & Package
TO-263AB (D2PAK) package with exposed cathode tab (pin 2), anode lead (pin 1), and no third terminal - standard 2-pin configuration for surface-mount Schottky rectifiers. Cathode marked by polarity symbol on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Forward current entry point | Connected to input/high-side node; must route with low-inductance path to minimize switching ringing |
| Pin 2 (Cathode / Exposed Tab) | Forward current exit & thermal interface | Electrically and thermally connected to output/ground plane; requires solder mask defined thermal pad per JESD51-5 |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Prevents premature edge breakdown under high dv/dt or localized overvoltage transients in fast-switching converters |
| Moisture sensitivity level 1 | Eliminates bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling |
| Matte tin-plated leads | Ensures reliable solder wetting and intermetallic formation per J-STD-002; avoids lead-free solder voiding issues |
| UL 94V-0 molding compound | Meets flammability safety requirements for end equipment certified to IEC 62368-1 or UL 62368-1 |
| Halogen-free per IEC 61249-2-21 | Supports RoHS-compliant and environmentally regulated supply chains without compromising thermal or electrical performance |
Applications
| Server VRM Output Rectification | USB-C PD Adapter Secondary Side |
|---|---|
Use Scenario: High-current, low-voltage output stage of multiphase buck converter supplying CPU/GPU core power. IC Role / Device Role / Timing Role: Primary synchronous rectification element replacing MOSFETs in cost-sensitive designs; conducts during low-side switch ON period. Use Value: 0.70 V VF reduces conduction loss vs. 1.2 V Si diodes, directly improving 12 V → 1.0 V conversion efficiency by ~1.8% at 20 A. | Use Scenario: Secondary-side rectification in 65 W USB-C Power Delivery adapter with GaN primary controller. IC Role / Device Role / Timing Role: Uncontrolled Schottky rectifier in quasi-resonant flyback topology; handles 20 A peak secondary current at 20 kHz–100 kHz switching. Use Value: 330 A IFSM withstands startup surges into cold capacitive loads; TO-263AB footprint allows direct thermal coupling to aluminum heatsink baseplate. |
| Industrial DC-DC Converter Input Protection | Telecom -48 V Backup Supply OR-ing |
Use Scenario: Input-stage reverse-polarity and surge protection in isolated 24 V/48 V industrial DC-DC modules. IC Role / Device Role / Timing Role: Forward-biased series protection diode; blocks reverse battery connection while passing full 20 A load current. Use Value: 50 V VRRM provides 2× margin over 24 V nominal rail; 150°C TJ rating ensures reliability in sealed, fanless enclosures. | Use Scenario: OR-ing diode in redundant -48 V telecom power shelf combining two rectifier outputs. IC Role / Device Role / Timing Role: Unidirectional current valve preventing backfeed between parallel power sources; operates continuously at 15–20 A. Use Value: Low 0.70 V VF minimizes voltage drop and heat generation across dual-path architecture, reducing thermal derating needs by ~35% vs. 1.0 V alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-20BQ050P-M3/45 | Same 50 V VRRM, 20 A IF, TO-263AB; VF = 0.67 V typ @ 20 A - 30 mV lower, but IR = 1.0 mA @ 25°C (2× higher leakage) | Better conduction loss, but higher leakage may impact light-load efficiency in standby-critical telecom systems | Prefer for high-efficiency SMPS where thermal headroom exists; verify IR impact on no-load regulation |
| ON Semiconductor SB2050 | Same 50 V/20 A rating, TO-263AB; VF = 0.72 V max @ 20 A - 20 mV higher, RθJC = 1.8 °C/W - 0.3 °C/W worse thermal resistance | Requires larger thermal pad or lower ambient to sustain 20 A continuous; slightly lower efficiency at full load | Acceptable for cost-driven consumer adapters with moderate duty cycles; avoid in thermally constrained server VRMs |
Compared with VS-20BQ050P-M3/45 and SB2050, the SRAS2050 delivers balanced performance: lower leakage than Vishay for standby-sensitive designs, and better thermal resistance than ON Semi for sustained 20 A operation - making it optimal for industrial DC-DC and USB-C PD where both efficiency and thermal robustness matter.
Availability
SRAS2050 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C power delivery adapters, and industrial DC-DC converters requiring stable component supply, long-term lifecycle support, and RoHS/halogen-free compliance.
Supply support for SRAS2050 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power devices, rectifiers, and protection components since 1979.
The SRAS2050 belongs to TSC's SRAS20xx Schottky rectifier product line, engineered for high-current, medium-voltage switching applications where low forward voltage, surge resilience, and surface-mount manufacturability are prioritized over ultra-low leakage.
FAQ
What is the maximum junction temperature rating for the SRAS2050?
The SRAS2050 has a maximum junction temperature (TJ) rating of +150°C, as specified in its Absolute Maximum Ratings table. This allows operation in high-ambient environments such as enclosed industrial power supplies or server VRMs when paired with adequate PCB copper area. Derating curves in the datasheet define safe current limits above 25°C case temperature, and the SRAS2050 must not exceed this limit to ensure long-term reliability.
Does the SRAS2050 have a guard ring structure, and what does it do?
Yes, the SRAS2050 incorporates a guard ring structure, explicitly listed in its FEATURES section. This design feature prevents premature avalanche breakdown at the silicon periphery under high dv/dt conditions or localized overvoltage stress - common in fast-switching SMPS and DC-DC converters. It enhances ruggedness without increasing forward voltage, making the SRAS2050 suitable for demanding power conversion topologies.
What is the forward voltage of the SRAS2050 at 20 A and 25°C?
The SRAS2050 has a maximum forward voltage (VF) of 0.70 V at 20 A and 25°C junction temperature, per its Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the worst-case conduction loss contributor. At elevated temperatures (e.g., 100°C), VF decreases slightly, but system-level thermal design must ensure the SRAS2050 stays within its 150°C TJ limit to maintain this performance.
Is the SRAS2050 halogen-free and RoHS compliant?
Yes, the SRAS2050 is both halogen-free in accordance with IEC 61249-2-21 and RoHS compliant, as confirmed in the FEATURES section of its official documentation. These certifications are verified through material declarations and testing, supporting compliance for global markets including EU, China, and South Korea. The halogen-free status applies to the molding compound and plating, not just the die.
What packaging format is used for the SRAS2050, and how many units per reel?
The SRAS2050 is supplied in TO-263AB (D2PAK) package on tape-and-reel, with 800 units per reel, as stated in the ORDERING INFORMATION section. This format is optimized for automated SMT placement and meets JEDEC standards for moisture sensitivity level 1 - eliminating pre-bake requirements and enabling direct use in standard reflow profiles.
SRAS2050 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SRAS2050 FAQ
1.How can I place an order for SRAS2050 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRAS2050 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 SRAS2050 reliable?
The price and inventory of SRAS2050 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAS2050 is usually 5 days.
3.What payment methods are accepted for SRAS2050?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAS2050 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRAS2050?
SRAS2050 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRAS2050 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 SRAS2050?
For technical support, including SRAS2050 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAS2050 requirements.
6.How does Aetrix verify that SRAS2050 is sourced from the original manufacturer or authorized distributors?
All SRAS2050 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 SRAS2050 meets industry standards.
7.What is the process for return or replacement of SRAS2050?
All SRAS2050 units undergo pre-shipment inspection (PSI). If there is an issue with SRAS2050, 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 SRAS2050 part is unused and in its original packaging.
Return procedure for SRAS2050:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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