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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

Taiwan Semiconductor Corporation SRS1040

Name: SRS1040
Brand: Taiwan Semiconductor Corporation
SKU: SRS1040
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SRS1040

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Diode Arrays

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: SRS1040.pdf

Description:: DIODE ARR SCHOTT 40V 10A TO263AB

Quantity:: RFQ Add To RFQ list

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Inventory:5,648

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Product details

Overview

SRS1040 from Taiwan Semiconductor is a 10A, 40V repetitive peak reverse voltage Schottky barrier rectifier in TO-263AB (D2PAK) package, featuring low forward voltage (0.55 V at 5 A, 25°C), 120 A surge capability, and junction temperature rating up to +125°C. It serves as a high-efficiency output rectifier in DC–DC converters and AC–DC adapters.

For engineers reviewing the SRS1040 datasheet, SRS1040 pinout, SRS1040 application, or SRS1040 equivalent, key selection criteria include its 40 V V_RRM, dual-die configuration, thermal resistance of 2°C/W (junction-to-case), moisture sensitivity level 1 compliance, and suitability for automated SMT placement in high-density power supplies.

Technical Context

The SRS1040 uses a dual-die Schottky structure optimized for low conduction loss and fast switching, with typical forward voltage of 0.55 V at 5 A and 25°C. Its 2°C/W junction-to-case thermal resistance enables efficient heat transfer to the PCB copper pour or heatsink in TO-263AB mounting.

It operates across –55°C to +125°C junction temperature range, supports 120 A non-repetitive surge current (8.3 ms half-sine), and exhibits ≤500 µA reverse leakage at rated 40 V and 25°C - critical for maintaining efficiency in high-frequency SMPS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - maximum repetitive reverse blocking voltage; defines safe operating limit in rectifier applications
I_F	10 A - continuous average forward current; determines steady-state power handling capacity
I_FSM	120 A - peak non-repetitive surge current; supports inrush and transient overload without failure
V_F	0.55 V @ 5 A, 25°C - low conduction loss directly reduces power dissipation and improves system efficiency
R_θJC	2 °C/W - thermal resistance from junction to case; enables predictable thermal design with D2PAK copper pad layout
T_J max	+125 °C - maximum allowable junction temperature; constrains thermal margin in sealed or high-ambient environments
MSL	Level 1 (J-STD-020) - no floor life limitation; allows indefinite storage and standard reflow without baking

Pinout & Package

Package: TO-263AB (D2PAK), surface-mount, single-anode/dual-cathode configuration with exposed cathode tab for thermal and electrical connection.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Tab)	Input terminal for forward current flow	Exposed metal tab serves as primary anode connection and thermal path; must be soldered to large copper area
Cathode 1 (Lead 1)	Output terminal (first diode)	Standard cathode lead; electrically tied to cathode of first Schottky die
Cathode 2 (Lead 2)	Output terminal (second diode)	Second cathode lead; enables dual-output or parallel operation; both cathodes internally isolated

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against transient overvoltage events without derating V_RRM
Matte tin-plated leads	Ensures reliable solderability per J-STD-002, compatible with lead-free and SnPb processes
Dual-die configuration	Enables independent cathode routing for dual-output or interleaved converter designs
UL 94V-0 molding compound	Meets flammability safety requirements for end equipment certification (e.g., UL/IEC 62368)
Halogen-free construction	Complies with IEC 61249-2-21; supports RoHS and environmental compliance programs

Applications

Server VRM Output Rectification	Laptop Adapter Secondary Side
Use Scenario: High-current, high-frequency synchronous rectification in 48 V to 12 V or 12 V to 1.8 V point-of-load converters. IC Role / Device Role / Timing Role: Primary output rectifier replacing MOSFETs in secondary-side synchronous topology. Use Value: 0.55 V forward drop at 5 A reduces conduction loss by ~35% vs. comparable 60 V Schottky devices, improving full-load efficiency.	Use Scenario: Secondary-side rectification in compact 65 W laptop AC–DC adapters operating at 100–300 kHz. IC Role / Device Role / Timing Role: Uncontrolled rectifier in flyback or LLC secondary stage. Use Value: MSL Level 1 and D2PAK thermal performance allow direct integration into high-density layouts without baking or thermal derating.
Industrial DC–DC Converter	Telecom Power Shelf
Use Scenario: 24 V input, 5 V/10 A output isolated DC–DC module for programmable logic controllers. IC Role / Device Role / Timing Role: Output freewheeling and rectification diode in active-clamp forward topology. Use Value: 120 A surge rating withstands repeated load dump transients common in industrial 24 V systems.	Use Scenario: Redundant 48 V to 12 V intermediate bus conversion in telecom power shelves with forced-air cooling. IC Role / Device Role / Timing Role: Main output rectifier in phase-shifted full-bridge secondary. Use Value: Dual-cathode leads simplify PCB routing for paralleled outputs or differential sensing configurations.

Server VRM Output Rectification

Laptop Adapter Secondary Side

Use Scenario: High-current, high-frequency synchronous rectification in 48 V to 12 V or 12 V to 1.8 V point-of-load converters.

IC Role / Device Role / Timing Role: Primary output rectifier replacing MOSFETs in secondary-side synchronous topology.

Use Value: 0.55 V forward drop at 5 A reduces conduction loss by ~35% vs. comparable 60 V Schottky devices, improving full-load efficiency.

Use Scenario: Secondary-side rectification in compact 65 W laptop AC–DC adapters operating at 100–300 kHz.

IC Role / Device Role / Timing Role: Uncontrolled rectifier in flyback or LLC secondary stage.

Use Value: MSL Level 1 and D2PAK thermal performance allow direct integration into high-density layouts without baking or thermal derating.

Industrial DC–DC Converter

Telecom Power Shelf

Use Scenario: 24 V input, 5 V/10 A output isolated DC–DC module for programmable logic controllers.

IC Role / Device Role / Timing Role: Output freewheeling and rectification diode in active-clamp forward topology.

Use Value: 120 A surge rating withstands repeated load dump transients common in industrial 24 V systems.

Use Scenario: Redundant 48 V to 12 V intermediate bus conversion in telecom power shelves with forced-air cooling.

IC Role / Device Role / Timing Role: Main output rectifier in phase-shifted full-bridge secondary.

Use Value: Dual-cathode leads simplify PCB routing for paralleled outputs or differential sensing configurations.

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-10BQ040-M3/4B	Same 40 V V_RRM, 10 A I_F, but TO-252 (DPAK); R_θJC = 3.5°C/W vs. 2°C/W	Lower thermal performance limits power density in high-ambient or sealed enclosures	Prefer SRS1040 where board space permits D2PAK and thermal headroom is constrained
ON Semiconductor SB1040	Identical V_RRM/I_F ratings, same TO-263AB package, but higher V_F (0.62 V typ. @ 5 A)	Higher conduction loss increases junction temperature under sustained load	Choose SRS1040 when <0.57 V V_F is required to meet efficiency targets at 5–10 A

Compared with VS-10BQ040-M3/4B and SB1040, the SRS1040 delivers superior thermal resistance and lower forward voltage - enabling higher power density and cooler operation in space-constrained, thermally demanding 40 V rectifier applications.

Availability

SRS1040 is available at Aetrix Electronics and suitable for switching mode power supplies, DC–DC converters, and AC–DC adapters requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SRS1040 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.

The SRS1040 belongs to TSC's high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in consumer, industrial, and telecom infrastructure applications.

FAQ

What is the maximum junction temperature rating for the SRS1040?

The SRS1040 has a maximum junction temperature (T_J) rating of +125°C, as specified in its absolute maximum ratings table. This rating applies under continuous operation with proper thermal management using the TO-263AB package's exposed cathode tab. Operation beyond +125°C risks irreversible degradation of the Schottky junction. Derating curves in the SRS1040 datasheet define allowable current reduction above +25°C ambient.

Does the SRS1040 have a guard ring structure, and what is its function?

Yes, the SRS1040 incorporates a guard ring structure explicitly cited in its features list. This design element improves edge termination robustness, enhancing protection against localized electric field concentration during transient overvoltage events - such as load dump or inductive switching spikes - without requiring external snubbers or voltage derating.

Is the SRS1040 suitable for lead-free reflow soldering processes?

Yes, the SRS1040 is qualified for lead-free reflow soldering. Its matte tin-plated leads meet J-STD-002 solderability requirements, and the TO-263AB package is rated for peak reflow temperatures up to 260°C. The device carries MSL Level 1 classification per J-STD-020, meaning it can be processed without pre-baking regardless of storage duration.

What is the reverse leakage current specification for the SRS1040 at 100°C junction temperature?

At 100°C junction temperature and rated 40 V reverse voltage, the SRS1040 exhibits a maximum reverse leakage current (I_R) of 15 mA per diode, as confirmed in the Electrical Specifications table. This value reflects worst-case behavior under elevated thermal stress and is critical for evaluating standby power loss in high-temperature environments.

How does the dual-die configuration of the SRS1040 impact PCB layout?

The SRS1040's dual-die configuration provides two separate cathode terminals (Leads 1 and 2), allowing independent routing for dual-output designs or paralleled operation. Unlike single-cathode variants, this enables split-current paths, differential voltage sensing, or redundancy - but requires careful copper balancing to avoid current imbalance. The exposed anode tab remains common to both dies.

SRS1040 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):: 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 @ 40 V

Operating Temperature - Junction:: -55°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: TO-263AB (D2PAK)

SRS1040 FAQ

1.How can I place an order for SRS1040 through Aetrix?

Please submit a Request for Quotation (RFQ) for SRS1040 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 SRS1040 reliable?

The price and inventory of SRS1040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRS1040 is usually 5 days.

3.What payment methods are accepted for SRS1040?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRS1040 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SRS1040?

SRS1040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SRS1040 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 SRS1040?

For technical support, including SRS1040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRS1040 requirements.

6.How does Aetrix verify that SRS1040 is sourced from the original manufacturer or authorized distributors?

All SRS1040 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 SRS1040 meets industry standards.

7.What is the process for return or replacement of SRS1040?

All SRS1040 units undergo pre-shipment inspection (PSI). If there is an issue with SRS1040, 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 SRS1040 part is unused and in its original packaging.

Return procedure for SRS1040:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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