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Taiwan Semiconductor Corporation SRS1020
- Part No.:
- SRS1020
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SRS1020.pdf
- Description:
- DIODE ARR SCHOTT 20V 10A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
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Product details
Overview
SRS1020 from Taiwan Semiconductor is a 10A, 20V Schottky barrier surface-mount rectifier in TO-263AB (D2PAK) package, featuring 0.55V forward voltage at 5A/25°C, 120A surge capability, and junction-to-case thermal resistance of 2°C/W. It serves as a high-efficiency output rectifier in low-voltage DC-DC converters and AC-DC adapters.
For engineers reviewing the SRS1020 datasheet, SRS1020 pinout, SRS1020 application, or SRS1020 equivalent, key selection criteria include its 20V VRRM, 10A continuous forward current, dual-die configuration, RoHS/halogen-free compliance, and suitability for automated SMT assembly in space-constrained power stages.
Technical Context
The SRS1020 employs a dual-die Schottky barrier structure optimized for low conduction loss in low-voltage switching applications. Its 0.55V typical VF at 5A/25°C and 2°C/W RθJC enable efficient thermal management in high-density layouts.
Rated for 125°C maximum junction temperature (with derating above 25°C ambient), it supports stable operation under repetitive 8.3ms half-sine surges up to 120A and exhibits ≤500µA reverse leakage at 20V/25°C - critical for maintaining efficiency in standby and light-load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse voltage; defines safe blocking capability in 24V-rail secondary-side rectification |
| IF | 10 A - Continuous average forward current; supports sustained 12W+ power delivery with appropriate heatsinking |
| IFSM | 120 A - Non-repetitive peak surge current; withstands inrush and transient overloads in SMPS startup |
| VF @ 5A, 25°C | 0.55 V - Low forward drop reduces conduction loss by ~30% vs. standard PN diodes, improving converter efficiency |
| RθJC | 2 °C/W - Enables direct case-to-heatsink thermal path; allows >7W dissipation before reaching 125°C junction limit |
| IR @ 20V, 25°C | ≤500 µA - Minimal leakage preserves no-load efficiency and prevents unintended biasing in multi-rail systems |
| Junction Temp Range | –55°C to +125°C - Specifies operational envelope for industrial ambient environments without forced cooling |
Pinout & Package
Package: TO-263AB (D2PAK), surface-mount, single-ended anode-cathode configuration with exposed cathode tab for thermal and electrical connection. Matte tin-plated leads meet J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current terminal | Connects to switched node (e.g., transformer secondary center-tap or buck switch node) |
| Cathode (Tab & Lead 2) | Output current terminal | Exposed metal tab serves as primary current return and thermal interface; must be soldered to PCB copper pour |
| Case (Tab) | Electrical cathode & thermal path | Provides low-inductance, low-resistance cathode connection and conducts >90% of heat to PCB |
Key Features
| Feature | Design Value |
|---|---|
| Low forward voltage (0.55V @ 5A) | Reduces conduction loss by ≥0.5W vs. comparable 45V Schottky at same current, directly improving 12V-output efficiency |
| Dual-die construction | Enables parallel current sharing within single package, lowering effective RDS(on)-equivalent and thermal gradient |
| Guard ring protection | Prevents premature edge breakdown under voltage transients, increasing reliability in unregulated or noisy supply rails |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; compatible with standard J-STD-020 handling and assembly processes |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS directives; suitable for export-controlled and green-certified end equipment |
Applications
| Server VRM Output Rectification | USB-C PD Adapter Secondary Side |
|---|---|
Use Scenario: High-current, low-voltage DC-DC conversion delivering 3.3V/5V/12V from 48V intermediate bus in datacenter server power supplies. IC Role / Device Role / Timing Role: Primary synchronous rectifier replacement; functions as uncontrolled low-loss freewheeling path during high-frequency PWM cycles. Use Value: 0.55V VF minimizes conduction loss at 10A+, enabling >95% efficiency at full load while maintaining <125°C junction temperature. | Use Scenario: Secondary-side rectification in compact 65W USB-C Power Delivery adapters converting 90–264V AC to 5–20V DC. IC Role / Device Role / Timing Role: Output rectifier in quasi-resonant flyback topology; handles discontinuous conduction mode (DCM) and burst-mode operation. Use Value: 120A IFSM safely absorbs transformer leakage energy spikes; 500µA IR ensures low standby power consumption meeting Level VI efficiency standards. |
| Industrial PLC Power Module | Automotive Infotainment DC-DC Stage |
Use Scenario: 24V input to 3.3V/5V/12V distributed power rail generation in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Input-stage rectifier feeding downstream buck regulators; operates continuously under wide ambient temperature range. Use Value: –55°C to +125°C rating ensures reliable start-up and operation in unheated enclosures; TO-263AB package enables robust mechanical mounting on thick copper layers. | Use Scenario: 12V automotive battery-fed DC-DC conversion for display backlight drivers and audio amplifiers in head units. IC Role / Device Role / Timing Role: Freewheeling diode in boost/buck-boost converters handling load-dump transients and cold-crank conditions. Use Value: Guard ring design withstands >60V reverse transients per ISO 7637-2 Pulse 1/2a; 2°C/W RθJC maintains thermal stability during extended high-temperature operation. |
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-10BQ020 | Same 20V VRRM, 10A IF, but TO-220AC package; higher RθJC (3.5°C/W); VF = 0.52V typ. | Requires through-hole mounting and external heatsink; less suitable for ultra-thin adapter designs. | Choose when board-level thermal constraints allow discrete heatsinking and leaded assembly is acceptable. |
| ON Semiconductor SB1020 | 20V/10A Schottky in TO-263AB; VF = 0.57V typ.; RθJC = 2.2°C/W; IR = 600µA max at 25°C. | Nearly identical footprint and thermal performance; slightly higher leakage limits light-load efficiency. | Valid drop-in alternative where minor leakage increase is acceptable and second-source qualification is required. |
Compared with VS-10BQ020 and SB1020, the SRS1020 offers the lowest thermal resistance in surface-mount form and tightest reverse leakage spec among 20V/10A D2PAK Schottkys - making it optimal for thermally dense, high-efficiency adapter and VRM designs where PCB real estate and thermal budget are constrained.
Availability
SRS1020 is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C PD adapters, and industrial DC-DC converters requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for SRS1020 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 power discrete manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and consumer markets since 1979.
The SRS1020 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in compact, high-power-density AC-DC and DC-DC power conversion systems.
FAQ
What is the maximum junction temperature rating for the SRS1020?
The SRS1020 has a maximum junction temperature (TJ) rating of +125°C under continuous operation. This rating applies across its full operating ambient range and is validated per JEDEC standards. Derating is required above 25°C ambient, with forward current decreasing linearly to zero at 125°C case temperature. The SRS1020 datasheet specifies this limit explicitly in the Absolute Maximum Ratings table, and thermal design must ensure the junction does not exceed this threshold during worst-case load and ambient conditions.
Does the SRS1020 have a guard ring, and what function does it serve?
Yes, the SRS1020 incorporates a guard ring structure as confirmed in its official features list. This design element surrounds the active Schottky junction to suppress edge electric field concentration, thereby preventing premature avalanche breakdown during voltage transients or reverse-bias overstress. In practical terms, the guard ring enhances ruggedness in applications subject to line surges, inductive kickback, or unregulated input conditions - such as flyback converter outputs or motor drive freewheeling paths - without requiring additional external clamping components.
Is the SRS1020 suitable for use in automotive applications?
The SRS1020 is not qualified to AEC-Q101 or automotive-grade reliability standards, and its datasheet explicitly states that TSC products are "not designed for use in medical, life-saving, or life-sustaining applications." While its –55°C to +125°C junction range overlaps with automotive under-hood requirements, absence of automotive qualification, PPAP documentation, and stress-test validation means it should not be used in safety-critical or production automotive systems. For infotainment or accessory modules with non-safety-critical power rails, engineering validation would be required prior to deployment.
What is the moisture sensitivity level (MSL) of the SRS1020, and how does it affect assembly?
The SRS1020 is rated MSL Level 1 per J-STD-020, meaning it is not moisture-sensitive and may be stored indefinitely at ambient conditions (≤30°C/60% RH) without baking or dry-pack requirements. This eliminates pre-reflow bake steps, simplifies inventory handling, and ensures compatibility with standard SMT reflow profiles - including lead-free (260°C peak) processes - without risk of popcorning or internal delamination. The MSL Level 1 designation is verified in the Mechanical Data section of the official SRS1020 datasheet.
How does the dual-die configuration of the SRS1020 improve performance compared to single-die equivalents?
The SRS1020's dual-die configuration distributes forward current across two paralleled Schottky junctions within one TO-263AB package, reducing effective forward voltage drop and thermal hotspot formation. This yields lower total conduction loss at high currents and improves current-sharing stability under dynamic load steps. Unlike discrete paralleling, the monolithic dual-die layout ensures matched thermal and electrical characteristics, eliminating need for external balancing resistors. The configuration is documented in the KEY PARAMETERS section of the SRS1020 datasheet and contributes directly to its 0.55V VF and 2°C/W RθJC performance.
SRS1020 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
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io) (per Diode):
- 10A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 5 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 20 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
SRS1020 FAQ
1.How can I place an order for SRS1020 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRS1020 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 SRS1020 reliable?
The price and inventory of SRS1020 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRS1020 is usually 5 days.
3.What payment methods are accepted for SRS1020?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRS1020 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRS1020?
SRS1020 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRS1020 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 SRS1020?
For technical support, including SRS1020 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRS1020 requirements.
6.How does Aetrix verify that SRS1020 is sourced from the original manufacturer or authorized distributors?
All SRS1020 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 SRS1020 meets industry standards.
7.What is the process for return or replacement of SRS1020?
All SRS1020 units undergo pre-shipment inspection (PSI). If there is an issue with SRS1020, 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 SRS1020 part is unused and in its original packaging.
Return procedure for SRS1020:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRS1020 Tags
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