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Taiwan Semiconductor Corporation SRS1640
- Part No.:
- SRS1640
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SRS1640.pdf
- Description:
- DIODE ARR SCHOTT 40V 16A TO263AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,719
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Product details
Overview
SRS1640 from Taiwan Semiconductor is a 16A, 40V Schottky barrier rectifier in TO-263AB (D2PAK) package, designed for high-efficiency DC/DC conversion and SMPS secondary-side rectification. It features 0.55V forward voltage at 8A/25°C, 150A surge capability, 2°C/W junction-to-case thermal resistance, and operates up to 125°C junction temperature.
For engineers reviewing the SRS1640 datasheet, SRS1640 pinout, SRS1640 application, or SRS1640 equivalent, key selection factors include its 40V VRRM rating, low VF performance at elevated temperature, dual-die construction, moisture sensitivity level 1 compliance, and suitability for automated SMT assembly in high-density power supplies.
Technical Context
The SRS1640 integrates two parallel Schottky die in a single TO-263AB thermally optimized package, enabling high current handling with low conduction loss. Its guard ring structure provides overvoltage protection, and the matte tin-plated leads meet J-STD-002 solderability requirements.
Thermal performance is defined by RθJC = 2°C/W, supporting high-power density designs. The device is rated for TJ = –55°C to +125°C, with IR ≤ 500 µA at 25°C and ≤ 15 mA at 100°C under rated reverse voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in DC/DC flyback or synchronous rectifier topologies |
| IF | 16 A - Continuous forward current rating at TC = 110°C; determines steady-state power delivery capacity |
| IFSM | 150 A - Non-repetitive peak surge current (8.3 ms half-sine); supports inrush and transient overload tolerance |
| VF @ 8A, 25°C | 0.55 V - Low forward drop directly reduces conduction loss and improves system efficiency at typical operating currents |
| RθJC | 2 °C/W - Junction-to-case thermal resistance; enables direct heatsinking via PCB copper or external heatsink for thermal management |
| TJ max | 125 °C - Maximum allowable junction temperature; sets thermal design margin for reliability in enclosed or high-ambient environments |
| IR @ 40V, 25°C | ≤500 µA - Low leakage ensures minimal standby power loss in offline adapters and energy-sensitive applications |
Pinout & Package
Package: TO-263AB (D2PAK), surface-mount, 3-terminal configuration with anode-cathode-anode layout (dual common-cathode die). Case meets UL 94V-0; terminals are matte tin-plated per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Left) | Anode 1 | Input terminal for first Schottky diode; connects to transformer secondary or switching node in dual-phase rectification |
| Pin 2 (Center Tab) | Cathode (Common) | Internally bonded cathode connection for both dies; serves as primary thermal and electrical return path to PCB ground plane |
| Pin 3 (Right) | Anode 2 | Input terminal for second Schottky diode; enables interleaved or parallel rectifier configurations without external wiring |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring overvoltage protection | Enhances ruggedness against voltage transients in unregulated or loosely regulated SMPS outputs |
| Dual-die configuration | Enables balanced current sharing and reduced effective forward resistance versus single-die alternatives of same rating |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity |
| Halogen-free compound (IEC 61249-2-21) | Meets environmental compliance mandates for industrial and consumer electronics without compromising flame retardancy |
| High surge current capability (150A) | Withstands repeated output short-circuit events and startup surges in AC/DC adapters and telecom power systems |
Applications
| Laptop Adapter Secondary Rectification | Industrial DC/DC Converter Output Stage |
|---|---|
Use Scenario: High-efficiency 19–20V output stage in compact 65W laptop adapters with tight thermal constraints. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier replacing conventional diodes to minimize conduction loss and improve light-load efficiency. Use Value: 0.55V VF at 8A reduces power dissipation by ~1.2W vs. higher-VF alternatives, lowering heatsink requirements and enabling smaller form factor. | Use Scenario: 24V/48V isolated DC/DC module for programmable logic controllers with high reliability demands. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 16A load with surge tolerance during motor drive activation. Use Value: 150A IFSM and 125°C TJ rating ensure robust operation during field-induced transients and ambient temperatures up to 70°C. |
| Telecom Power Supply Rectification | LED Driver Secondary-Side Rectification |
Use Scenario: +48V intermediate bus rectification in distributed telecom power architectures with strict efficiency targets. IC Role / Device Role / Timing Role: High-current Schottky rectifier in forward or flyback topology delivering stable output under dynamic load steps. Use Value: Dual-die layout and 2°C/W RθJC allow direct thermal coupling to internal copper planes, maintaining <110°C junction temp at full load. | Use Scenario: Constant-current LED driver for commercial lighting with EMI-sensitive environment. IC Role / Device Role / Timing Role: Low-noise, low-leakage rectifier minimizing standby current and improving power factor correction stability. Use Value: ≤500 µA IR at 25°C and ≤15 mA at 100°C prevents excessive no-load dissipation and maintains regulation accuracy across temperature. |
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-16CTH04-M3 | Same 40V VRRM, 16A IF, TO-263AB package; VF = 0.54V @ 8A but TJ max = 175°C | Higher junction temperature rating allows extended operation in high-ambient industrial settings | Prefer when >125°C ambient or derating headroom is required; verify layout compatibility with Vishay's thermal pad dimensions |
| ON Semiconductor SB1640 | Identical 40V/16A rating and TO-263AB package; VF = 0.57V @ 8A, IR = 600 µA @ 25°C | Slightly higher VF and leakage may impact efficiency in ultra-low-power adapters | Acceptable for cost-sensitive designs where <0.02V VF difference is tolerable; confirm MSL level matches production flow |
Compared with VS-16CTH04-M3 and SB1640, the SRS1640 offers the lowest VF (0.55V) among the three while maintaining MSL Level 1 and halogen-free compliance-making it optimal for space-constrained, high-efficiency adapter and DC/DC designs where thermal and environmental specs are tightly coupled.
Availability
SRS1640 is available at Aetrix Electronics and suitable for laptop adapters, industrial DC/DC converters, and telecom power supplies requiring stable component supply, RoHS/halogen-free compliance, and automated placement support.
Supply support for SRS1640 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 semiconductor manufacturer specializing in discrete power devices, including Schottky rectifiers, MOSFETs, and TVS diodes for industrial and consumer applications.
The SRS1640 belongs to TSC's SRS16xx Schottky rectifier family, engineered specifically for high-current, low-VF secondary-side rectification in compact, high-efficiency switch-mode power supplies.
FAQ
What is the maximum junction temperature rating for the SRS1640?
The SRS1640 has a maximum junction temperature (TJ max) of +125°C, as specified in the Absolute Maximum Ratings table. This rating applies under continuous operation with proper thermal management via the TO-263AB package's exposed cathode tab. Operation beyond this limit risks parametric shift and long-term reliability degradation. Derating curves in the datasheet define allowable current reduction above 25°C ambient.
Does the SRS1640 have a common-cathode or common-anode configuration?
The SRS1640 uses a common-cathode configuration: Pin 2 (center tab) is the shared cathode, while Pins 1 and 3 are independent anodes. This dual-anode arrangement supports parallel or interleaved rectifier layouts without external diode pairing. The marking diagram and mechanical outline confirm cathode tab polarity alignment per industry standard D2PAK orientation.
Is the SRS1640 suitable for lead-free reflow soldering processes?
Yes, the SRS1640 is qualified for lead-free reflow soldering. Its matte tin-plated terminals comply with J-STD-002 for solderability, and its moisture sensitivity level is rated at Level 1 per J-STD-020-meaning it can be stored indefinitely at ≤30°C/60% RH without baking prior to assembly. Peak reflow temperature must not exceed 260°C per JEDEC J-STD-020.
How does the SRS1640's forward voltage compare to other 40V Schottky rectifiers in TO-263AB?
At IF = 8A and TJ = 25°C, the SRS1640 specifies VF ≤ 0.55V, which is lower than SB1640 (0.57V) and competitive with VS-16CTH04-M3 (0.54V). This 0.02V advantage over SB1640 translates to ~160 mW less conduction loss per diode at 8A, directly improving system efficiency-especially critical in high-volume, thermally constrained adapters.
What packaging and reel quantity is available for the SRS1640?
The SRS1640 is supplied in TO-263AB (D2PAK) package on tape-and-reel format, with 800 units per reel. Tape specifications conform to EIA-481 standards, and the carrier tape is designed for compatibility with standard pick-and-place equipment used in high-speed SMT lines. Reel ID and orientation markings follow TSC's standard ordering code SRS1640TR.
SRS1640 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):
- 16A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 8 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)
SRS1640 FAQ
1.How can I place an order for SRS1640 through Aetrix?
Please submit a Request for Quotation (RFQ) for SRS1640 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 SRS1640 reliable?
The price and inventory of SRS1640 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRS1640 is usually 5 days.
3.What payment methods are accepted for SRS1640?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRS1640 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRS1640?
SRS1640 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRS1640 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 SRS1640?
For technical support, including SRS1640 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRS1640 requirements.
6.How does Aetrix verify that SRS1640 is sourced from the original manufacturer or authorized distributors?
All SRS1640 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 SRS1640 meets industry standards.
7.What is the process for return or replacement of SRS1640?
All SRS1640 units undergo pre-shipment inspection (PSI). If there is an issue with SRS1640, 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 SRS1640 part is unused and in its original packaging.
Return procedure for SRS1640:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRS1640 Tags
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