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Taiwan Semiconductor Corporation SR4020PT
- Part No.:
- SR4020PT
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-247-3
- Datasheet:
-
SR4020PT.pdf
- Description:
- DIODE ARR SCHOTT 20V 40A TO247AD
- Quantity:
- Payment:
- Shipping:
Inventory:7,400
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Product details
Overview
SR4020PT from Taiwan Semiconductor is a 40A, 20V AEC-Q101-qualified Schottky barrier rectifier in TO-247AD (TO-3P) package, featuring 0.55V forward voltage at 20A/25°C, 400A surge capability, and guard ring overvoltage protection-used in high-efficiency SMPS outputs for monitors and DC-DC converters.
For engineers reviewing the SR4020PT datasheet, SR4020PT pinout, SR4020PT application, or SR4020PT equivalent, key selection factors include its 20V VRRM, dual-die configuration, junction-to-case thermal resistance of 1.2°C/W, and AEC-Q101 qualification for automotive-grade reliability assessment.
Technical Context
This Schottky rectifier uses dual-die construction in a single TO-247AD package to deliver 40A continuous forward current with low conduction loss. Its 0.55V VF at 20A/25°C and 1.2°C/W RθJC support thermally constrained high-density power designs.
The device integrates a guard ring structure for transient overvoltage robustness and meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance requirements-critical for automotive and industrial power supply reliability validation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in DC-DC output rectification |
| IF | 40 A - Continuous forward current rating; supports high-power adapter and monitor SMPS output stages |
| IFSM | 400 A - Non-repetitive surge current (8.3 ms half-sine); enables robust startup and fault tolerance |
| VF | 0.55 V @ 20A, 25°C - Low conduction loss directly reduces heat generation and improves system efficiency |
| RθJC | 1.2 °C/W - Junction-to-case thermal resistance; allows precise heatsink sizing for 125°C max junction operation |
| TJ max | 125°C - Maximum junction temperature rating; validated for sustained operation in enclosed power enclosures |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics; supports under-hood and infotainment power supplies |
Pinout & Package
Package: TO-247AD (TO-3P), 3-terminal through-hole package with isolated mounting tab; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current terminal | Connects to switching node (e.g., transformer secondary or buck converter switch node) |
| Cathode (Lead 2) | Output current terminal | Connects to output capacitor and load; carries full 40A DC output current |
| Case / Tab (Lead 3) | Thermal & electrical ground reference | Electrically tied to cathode; provides primary thermal path to heatsink; requires insulating washer if isolated mounting |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances avalanche ruggedness and prevents edge breakdown during voltage transients in SMPS flyback circuits |
| Dual-die configuration | Enables parallel conduction path within single package-reduces effective forward voltage and thermal gradient |
| UL Recognized (E-326243) | Validates safety compliance for end-equipment certification in adapters and consumer power supplies |
| Halogen-free (IEC 61249-2-21) | Meets environmental compliance requirements for RoHS-compliant industrial and automotive manufacturing |
| Matte tin-plated leads | Ensures reliable solder joint formation and long-term intermetallic stability per J-STD-002 |
Applications
| Monitor Power Supply | Automotive Infotainment DC-DC |
|---|---|
Use Scenario: Secondary-side rectification in 24–48V input, 12V/5V output SMPS for LCD monitor main board power. IC Role / Device Role / Timing Role: High-current Schottky rectifier replacing fast recovery diodes to minimize conduction loss and thermal stress. Use Value: 0.55V VF reduces power dissipation by ~35% vs. 0.85V FRD, enabling smaller heatsinks and higher power density. | Use Scenario: 12V-to-5V/3.3V buck converter output rectification in automotive head unit power management. IC Role / Device Role / Timing Role: AEC-Q101-qualified output rectifier handling pulsed load currents up to 40A peak. Use Value: 125°C TJ max and guard ring enable reliable operation under engine bay thermal cycling and load dump conditions. |
| Desktop PC Adapter | Industrial DC-DC Module |
Use Scenario: +12V rail rectification in compact external AC-DC adapters rated ≥60W. IC Role / Device Role / Timing Role: Primary output rectifier in quasi-resonant flyback topology with high-frequency switching. Use Value: Low VF and 400A IFSM support high-efficiency operation and withstand inrush surges during cold start. | Use Scenario: Isolated 48V-to-12V DC-DC module for factory automation controllers requiring long service life. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous isolated forward converter. Use Value: TO-247AD package with 1.2°C/W RθJC enables stable 40A operation at 70°C ambient without forced air cooling. |
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-40CPH02-M3 | 20V VRRM, 40A IF, TO-247AC package; VF = 0.52V @ 20A but no AEC-Q101 qualification | Non-automotive industrial use only; lacks guard ring and automotive reliability validation | Select when AEC-Q101 is not required and lowest possible VF is prioritized |
| ON Semiconductor MBR4020CT | 20V VRRM, 40A IF, TO-220AB package; VF = 0.57V @ 20A; no AEC-Q101 or UL recognition | Limited to cost-sensitive consumer adapters; lower thermal performance (RθJC ≈ 2.5°C/W) | Select for space-constrained non-automotive designs where TO-220 footprint is preferred |
Compared with VS-40CPH02-M3 and MBR4020CT, SR4020PT uniquely combines AEC-Q101 qualification, UL recognition, guard ring protection, and 1.2°C/W thermal resistance-making it the only choice for thermally demanding, automotive-qualified 20V Schottky rectification.
Availability
SR4020PT is available at Aetrix Electronics and suitable for monitor power supplies, automotive infotainment DC-DC converters, and industrial DC-DC modules requiring stable component supply with automotive-grade reliability and thermal performance.
Supply support for SR4020PT 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, serving global power electronics and automotive markets since 1979.
The SR4020PT belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered specifically for high-current, low-VF secondary-side rectification in automotive and industrial SMPS designs.
FAQ
What is the maximum junction temperature rating for SR4020PT?
The SR4020PT has a maximum junction temperature (TJ) rating of 125°C under continuous operation. This value is validated across the full operating range and supports design margin for thermal management in enclosed power supplies. The SR4020PT datasheet specifies -55°C to +125°C for junction temperature, distinguishing it from higher-voltage variants in the same family that support up to 150°C.
Is SR4020PT pin-compatible with other parts in the SR40xPT series?
No-SR4020PT shares the TO-247AD (TO-3P) package and 3-pin configuration with all SR40xPT variants, but pin function and electrical ratings differ strictly by voltage grade. Each part is individually marked (e.g., "SR4020PT") and must be selected based on required VRRM; substituting SR4020PT for SR40100PT would result in catastrophic failure under 100V reverse bias.
Does SR4020PT require a heatsink in typical 40A operation?
Yes-SR4020PT requires a heatsink for continuous 40A operation. With RθJC = 1.2°C/W and typical VF = 0.55V, power dissipation exceeds 22W at full load. Without heatsinking, junction temperature would exceed 125°C even at modest ambient temperatures. Mounting torque must not exceed 1.13 N·m to avoid package damage.
What does the "PT" suffix indicate in SR4020PT?
The "PT" suffix in SR4020PT denotes the standard-grade version in Taiwan Semiconductor's TO-247AD Schottky rectifier family. It distinguishes this part from the "PTH" variant, which adds AEC-Q101 qualification. SR4020PT itself is AEC-Q101 qualified per the provided documentation, confirming "PT" here reflects the base ordering code with automotive qualification included in this specific release.
How does the guard ring in SR4020PT improve reliability?
The guard ring in SR4020PT mitigates edge breakdown during voltage transients by redistributing electric field concentration at the silicon periphery. In SMPS applications subject to load dump or inductive kickback, this structure increases the device's ability to withstand short-duration overvoltage events without degradation-extending lifetime in automotive and industrial power supplies where such stresses are common.
SR4020PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io) (per Diode):
- 40A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 20 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247AD (TO-3P)
SR4020PT FAQ
1.How can I place an order for SR4020PT through Aetrix?
Please submit a Request for Quotation (RFQ) for SR4020PT 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 SR4020PT reliable?
The price and inventory of SR4020PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR4020PT is usually 5 days.
3.What payment methods are accepted for SR4020PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR4020PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR4020PT?
SR4020PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR4020PT 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 SR4020PT?
For technical support, including SR4020PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR4020PT requirements.
6.How does Aetrix verify that SR4020PT is sourced from the original manufacturer or authorized distributors?
All SR4020PT 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 SR4020PT meets industry standards.
7.What is the process for return or replacement of SR4020PT?
All SR4020PT units undergo pre-shipment inspection (PSI). If there is an issue with SR4020PT, 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 SR4020PT part is unused and in its original packaging.
Return procedure for SR4020PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR4020PT Tags
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