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Taiwan Semiconductor Corporation SRAS20100
- Part No.:
- SRAS20100
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SRAS20100.pdf
- Description:
- DIODE SCHOTTKY 100V 20A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,006
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Product details
Overview
SRAS20100 from Taiwan Semiconductor is a 20A, 100V Schottky barrier rectifier in TO-263AB (D2PAK) package, designed for high-efficiency DC/DC conversion and SMPS output rectification with low forward voltage (0.92 V at 20 A, 25°C) and high surge capability (330 A). It operates up to 150°C junction temperature and features guard ring overvoltage protection.
For engineers reviewing the SRAS20100 datasheet, SRAS20100 pinout, SRAS20100 application, or SRAS20100 equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, 1.5 °C/W junction-to-case thermal resistance, moisture sensitivity level 1 compliance, and suitability for automated SMT placement in high-current power supplies.
Technical Context
This single-die Schottky rectifier uses a planar junction structure with integrated guard ring to enhance avalanche ruggedness and reduce leakage under transient overvoltage. Its low VF and high IFSM support high-frequency switching topologies where conduction loss minimization and thermal management are critical.
The device is rated for continuous forward current of 20 A at case temperature ≤85°C, with derating to zero at 150°C. Reverse leakage remains ≤100 µA at 25°C and ≤5 mA at 125°C under rated VR, enabling stable operation in thermally demanding environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or forward converter secondary side |
| IF | 20 A - Continuous average forward current at TC = 85°C; supports high-output-current power rails |
| IFSM | 330 A - Non-repetitive surge current (8.3 ms half-sine); withstands inrush and fault transients without failure |
| VF @ 20A, 25°C | 0.92 V - Low conduction loss reduces heat generation and improves system efficiency in 12–48 V output stages |
| RθJC | 1.5 °C/W - Enables direct heatsinking to PCB copper or external heatsink; simplifies thermal design for 20 A loads |
| TJ max | 150 °C - Maximum junction temperature; allows operation in industrial ambient conditions up to 85°C with proper layout |
| MSL | Level 1 (per J-STD-020) - No floor life limitation; compatible with standard reflow profiles without dry-pack requirements |
Pinout & Package
Package: TO-263AB (D2PAK), surface-mount, single-anode/single-cathode configuration with exposed cathode tab for thermal and electrical connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 2) | Input current terminal | Connected to transformer secondary or switch node; carries full load current into the device |
| Cathode (Tab + Lead 3) | Output current terminal | Exposed metal tab serves as primary cathode path; must be soldered to large copper pour for thermal and current handling |
| NC (Lead 1) | No connect | Internally unconnected lead; left floating per datasheet - not used for signal or bias |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Improves edge termination reliability and increases VRRM margin against localized breakdown during voltage transients |
| Matte tin-plated leads | Ensures robust solderability per J-STD-002 and eliminates whisker risk per JESD 201 Class 2 |
| UL 94V-0 molding compound | Meets flammability safety requirements for enclosed power supply enclosures and industrial equipment |
| Halogen-free construction | Complies with IEC 61249-2-21; supports RoHS-compliant and environmentally regulated end products |
Applications
| Server Power Supply Output Rectification | Industrial DC/DC Converter Secondary Side |
|---|---|
Use Scenario: High-density 48 V to 12 V or 5 V isolated DC/DC modules in rack-mounted servers requiring >20 A output current. IC Role / Device Role / Timing Role: Primary synchronous rectifier replacement - functions as low-loss unidirectional current path on secondary winding. Use Value: 0.92 V VF at 20 A reduces conduction loss by ~15% vs. comparable 100 V Si diodes, lowering thermal stress on PCB copper and improving power density. | Use Scenario: 24 V input, 5–15 V output industrial DC/DC converters operating in ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Output freewheeling rectifier in forward or flyback topology, handling continuous 20 A load with minimal voltage drop. Use Value: 1.5 °C/W RθJC enables direct thermal coupling to internal heatsink planes, maintaining TJ < 130°C without forced air cooling. |
| Telecom AC/DC Adapter Secondary | Automotive On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Compact 100 W telecom wall adapters with high-efficiency requirements and space-constrained layouts. IC Role / Device Role / Timing Role: Main output rectifier in discontinuous conduction mode (DCM) flyback, conducting during transformer reset phase. Use Value: MSL Level 1 rating eliminates baking steps pre-reflow, streamlining high-volume SMT manufacturing and reducing process cost. | Use Scenario: 12 V auxiliary power rail generation inside EV on-board chargers, exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Isolated auxiliary supply rectifier feeding control logic and gate drivers, requiring long-term reliability at elevated temperature. Use Value: ≤5 mA IR at 125°C ensures stable no-load regulation and prevents thermal runaway in sealed OBC enclosures. |
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-20CPH100 | Same 100 V VRRM, 20 A IF, TO-263AB package; VF = 0.88 V @ 20 A (25°C), slightly lower conduction loss | Higher IFSM (400 A) but higher RθJC (2.0 °C/W); less efficient thermal transfer | Preferred where lower VF dominates over thermal resistance; verify heatsink interface compatibility |
| ON Semiconductor SB20100E | Identical 100 V/20 A rating, TO-263AB; VF = 0.95 V @ 20 A (25°C); IR = 150 µA @ 25°C (higher leakage) | Lower surge rating (IFSM = 250 A); tighter IR spec at high temperature not published | Suitable for cost-sensitive designs where 30 A IFSM margin is acceptable and leakage is not critical |
Compared with VS-20CPH100 and SB20100E, SRAS20100 offers balanced trade-offs: mid-range VF, best-in-class RθJC (1.5 °C/W), and industry-leading IFSM (330 A), making it optimal for thermally constrained, high-surge industrial power supplies.
Availability
SRAS20100 is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, telecom adapters, and automotive auxiliary power systems requiring stable component supply, long-lifecycle availability, and RoHS/halogen-free compliance.
Supply support for SRAS20100 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 rectifiers, TVS diodes, and MOSFETs for industrial and computing markets.
The SRAS20xx family was developed specifically for high-current, high-efficiency secondary-side rectification in compact, thermally aggressive power supplies - emphasizing low VF, robust surge handling, and reliable SMT manufacturability.
FAQ
What is the maximum junction temperature rating for SRAS20100?
The SRAS20100 has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings in the official TSC datasheet Version M2103. This rating applies under steady-state conditions with appropriate thermal management - including use of the exposed cathode tab for heatsinking - and enables reliable operation in industrial environments where case temperatures reach 85°C.
Does SRAS20100 have a guard ring structure, and what benefit does it provide?
Yes, SRAS20100 incorporates a guard ring structure as confirmed in the "Features" section of the TSC datasheet. This design enhances edge termination robustness, increasing tolerance to localized electric field concentration during voltage transients and improving long-term reliability under repetitive overvoltage stress in switching power supplies.
What is the forward voltage of SRAS20100 at 20 A and 125°C junction temperature?
The SRAS20100 datasheet specifies forward voltage only at TJ = 25°C (0.92 V) and does not publish VF at 125°C. However, typical Schottky VF decreases ~2 mV/°C; extrapolating conservatively yields ~0.72 V at 125°C. For design-critical applications, engineers should validate using actual characterization data or consult TSC's thermal SPICE models for SRAS20100.
Is SRAS20100 suitable for lead-free reflow soldering processes?
Yes, SRAS20100 is qualified for lead-free reflow soldering per J-STD-002, with matte tin-plated leads and MSL Level 1 rating (unlimited floor life). Its TO-263AB package withstands peak reflow temperatures up to 260°C, and the UL 94V-0 molding compound ensures stability during standard JEDEC J-STD-020 profile exposure.
How does the thermal resistance of SRAS20100 compare to similar 100 V Schottky rectifiers?
SRAS20100 has a junction-to-case thermal resistance (RθJC) of 1.5 °C/W, which is lower than industry averages for TO-263AB-packaged 100 V Schottky rectifiers (typically 1.8–2.2 °C/W). This 0.3–0.7 °C/W advantage directly improves thermal headroom - for example, reducing ΔT across the junction by ~6°C at 20 A - and supports higher power density in space-constrained designs.
SRAS20100 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):
- 100 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 920 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 100 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
- Operating Temperature - Junction:
- -55°C ~ 150°C
SRAS20100 FAQ
1.How can I place an order for SRAS20100 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRAS20100 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 SRAS20100 reliable?
The price and inventory of SRAS20100 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRAS20100 is usually 5 days.
3.What payment methods are accepted for SRAS20100?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRAS20100 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRAS20100?
SRAS20100 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRAS20100 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 SRAS20100?
For technical support, including SRAS20100 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRAS20100 requirements.
6.How does Aetrix verify that SRAS20100 is sourced from the original manufacturer or authorized distributors?
All SRAS20100 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 SRAS20100 meets industry standards.
7.What is the process for return or replacement of SRAS20100?
All SRAS20100 units undergo pre-shipment inspection (PSI). If there is an issue with SRAS20100, 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 SRAS20100 part is unused and in its original packaging.
Return procedure for SRAS20100:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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