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Taiwan Semiconductor Corporation SRS2040
- Part No.:
- SRS2040
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SRS2040.pdf
- Description:
- DIODE ARR SCHOTT 40V 20A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,845
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Product details
Overview
SRS2040 from Taiwan Semiconductor is a 20A, 40V repetitive peak reverse voltage Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring 0.55V forward voltage at 10A/25°C, 200A surge capability, and 1.5°C/W junction-to-case thermal resistance-designed for high-efficiency DC/DC converters and SMPS secondary-side rectification.
For engineers reviewing the SRS2040 datasheet, SRS2040 pinout, SRS2040 application, or SRS2040 equivalent, key selection criteria include its 40V VRRM, low VF performance at elevated temperature, dual-die construction, RoHS/halogen-free compliance, and suitability for automated SMT assembly in power conversion systems.
Technical Context
The SRS2040 uses a dual-die Schottky structure housed in a single TO-263AB (D2PAK) thermally enhanced surface-mount package with matte tin-plated leads. Its 40V VRRM rating targets mid-voltage secondary-side rectification where low conduction loss is critical.
It delivers 0.55V typical forward voltage at 10A and 25°C, with reverse leakage limited to 500µA at 25°C and 15mA at 100°C-enabling stable operation in thermally constrained adapters and compact DC/DC modules without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in secondary-side rectifier circuits |
| IF | 20 A - Continuous average forward current; supports high-power density designs up to 20A DC output |
| IFSM | 200 A - Non-repetitive surge current (8.3ms half-sine); withstands inrush and transient overloads in SMPS |
| VF @ 10A, 25°C | 0.55 V - Low conduction loss enabling >92% efficiency in 12V–24V output converters |
| RθJC | 1.5 °C/W - Efficient heat transfer to PCB copper; allows 20A operation with minimal heatsinking |
| TJ max | 125 °C - Maximum junction temperature; enables reliable operation in sealed or convection-limited enclosures |
| IR @ 40V, 25°C | 500 µA - Low reverse leakage preserves light-load efficiency and reduces standby power loss |
Pinout & Package
TO-263AB (D2PAK) package with three terminals: Anode 1, Cathode (common), Anode 2 - dual-anode, single-cathode configuration supporting parallel or interleaved rectifier topologies. Case meets UL 94V-0; terminals are matte tin-plated per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 | Input terminal for first Schottky die | Enables independent connection of first diode in dual-die layout; used in center-tapped or dual-output configurations |
| Cathode | Common output node for both dies | Single low-impedance return path; simplifies PCB routing and thermal management for shared output rail |
| Anode 2 | Input terminal for second Schottky die | Supports symmetrical current sharing or phase-split rectification without external balancing components |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring structure | Enhances ruggedness against voltage transients and improves long-term reliability under repeated surge stress |
| Moisture sensitivity level 1 | Eliminates bake requirements before reflow; compatible with standard SMT assembly lines without special handling |
| Dual-die integration | Reduces footprint vs. two discrete TO-263 devices; maintains thermal symmetry and current balance between paths |
| Halogen-free compound | Meets IEC 61249-2-21; supports environmental compliance for consumer and industrial end equipment |
| High IFSM/IF ratio (10:1) | Provides robust margin against line surges and startup inrush in AC/DC adapters and telecom power supplies |
Applications
| SMPS Secondary Rectification | USB-C PD Adapters |
|---|---|
Use Scenario: High-frequency synchronous rectification replacement in 65W–100W offline flyback converters. IC Role / Device Role / Timing Role: Discrete Schottky rectifier replacing MOSFET-based sync rectifiers where gate drive complexity must be avoided. Use Value: Delivers consistent 0.55V VF across load range without control circuitry-reducing BOM count and improving light-load efficiency stability. | Use Scenario: Output rectification in compact, thermally constrained USB-C Power Delivery adapters. IC Role / Device Role / Timing Role: Primary output diode handling continuous 20A DC current in multi-port 100W GaN-based adapters. Use Value: 1.5°C/W RθJC enables full-rated current on 2oz copper with no heatsink-critical for ultra-thin form factors. |
| Industrial DC/DC Converters | Telecom Intermediate Bus Converters |
Use Scenario: 48V input to 12V/24V step-down conversion in DIN-rail mounted PLC power modules. IC Role / Device Role / Timing Role: High-current freewheeling diode in non-isolated buck converters operating at 200–500kHz. Use Value: Dual-anode configuration allows interleaved conduction, reducing ripple current stress on input capacitors and EMI filter components. | Use Scenario: Output rectification in 3kW telecom rectifier shelves using distributed intermediate bus architecture. IC Role / Device Role / Timing Role: Secondary-side Schottky device in 48V–12V isolated DC/DC bricks with strict thermal derating requirements. Use Value: 125°C TJmax and 15mA IR @ 100°C ensure stable performance under sustained 70°C ambient conditions in enclosed rack environments. |
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-20CPH04-M3 | Same 40V VRRM, 20A IF, TO-263AB package; VF = 0.57V @ 10A, RθJC = 1.6°C/W | Marginally higher VF and thermal resistance; requires slightly larger copper area for same thermal performance | Preferred where Vishay qualification or existing supply chain alignment is required |
| ON Semiconductor MBR2040CT | 40V VRRM, 20A IF, TO-220AB package; VF = 0.61V @ 10A; no dual-die configuration | Through-hole mounting only; lacks dual-anode flexibility and thermal performance of D2PAK | Selected when legacy through-hole assembly or lower-cost procurement drives design choice |
Compared with VS-20CPH04-M3 and MBR2040CT, the SRS2040 offers superior thermal efficiency (1.5°C/W), lower forward voltage (0.55V), and dual-anode topology-making it optimal for space-constrained, high-density SMT power designs requiring balanced current sharing or simplified layout.
Availability
SRS2040 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, RoHS-compliant packaging, and high-volume tape-and-reel delivery.
Supply support for SRS2040 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 SRS2040 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, surface-mount secondary-side rectification in compact, thermally demanding power conversion systems.
FAQ
What is the maximum junction temperature rating for the SRS2040?
The SRS2040 has a maximum junction temperature (TJ) rating of 125°C under normal operating conditions. This rating is confirmed in the Absolute Maximum Ratings table and applies across the full 20A forward current range. Operation above this temperature risks permanent degradation of the Schottky junction. Derating curves in the datasheet show usable current decreases linearly above 25°C case temperature, and the SRS2040 must be mounted on adequate copper area to maintain TJ ≤ 125°C at full load.
Does the SRS2040 support automated pick-and-place assembly?
Yes, the SRS2040 supports automated placement per industry standards. It carries moisture sensitivity level (MSL) 1 per J-STD-020, eliminating pre-bake requirements before reflow. Its TO-263AB (D2PAK) package features matte tin-plated leads compliant with J-STD-002 solderability specifications, and the body geometry is optimized for vacuum nozzle pickup. The 1.37g weight and symmetrical lead configuration further ensure reliable feeding and placement accuracy on high-speed SMT lines.
How does the dual-die configuration of the SRS2040 affect circuit layout?
The SRS2040's dual-anode, single-cathode configuration allows flexible PCB routing for interleaved or center-tapped topologies without adding discrete components. Anode 1 and Anode 2 can be driven by separate transformer windings or phase-shifted switch nodes, while the common cathode simplifies output capacitor placement and thermal pad connection. This layout reduces parasitic inductance versus two discrete diodes and enables inherent current balancing when paired with matched trace lengths and copper weights.
What is the reverse leakage current specification for the SRS2040 at elevated temperature?
The SRS2040 specifies 15mA maximum reverse leakage current (IR) at rated 40V reverse voltage and 100°C junction temperature. At 25°C, leakage is limited to 500µA max. This temperature-dependent behavior is critical for standby efficiency in adapters and light-load regulation in DC/DC converters. The datasheet confirms this value under pulse test conditions (PW = 30ms), ensuring realistic worst-case characterization for thermal design validation.
Is the SRS2040 halogen-free and RoHS compliant?
Yes, the SRS2040 is both RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated or chlorinated flame retardants, and all homogeneous materials meet EU Directive 2011/65/EU requirements. Certificate of Compliance and material declarations are available from Taiwan Semiconductor upon request, and the device carries appropriate marking per regulatory labeling guidelines for restricted substances.
SRS2040 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):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263AB (D2PAK)
SRS2040 FAQ
1.How can I place an order for SRS2040 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRS2040 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 SRS2040 reliable?
The price and inventory of SRS2040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRS2040 is usually 5 days.
3.What payment methods are accepted for SRS2040?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRS2040 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRS2040?
SRS2040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRS2040 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 SRS2040?
For technical support, including SRS2040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRS2040 requirements.
6.How does Aetrix verify that SRS2040 is sourced from the original manufacturer or authorized distributors?
All SRS2040 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 SRS2040 meets industry standards.
7.What is the process for return or replacement of SRS2040?
All SRS2040 units undergo pre-shipment inspection (PSI). If there is an issue with SRS2040, 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 SRS2040 part is unused and in its original packaging.
Return procedure for SRS2040:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRS2040 Tags
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