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

Taiwan Semiconductor Corporation SR2040

Name: SR2040
Brand: Taiwan Semiconductor Corporation
SKU: SR2040
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR2040

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: SR2040.pdf

Description:: DIODE ARR SCHOTT 40V 20A TO220AB

Quantity:: RFQ Add To RFQ list

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Inventory:9,355

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Product details

Overview

SR2040 from Taiwan Semiconductor is a 20A, 40V repetitive peak reverse voltage Schottky barrier rectifier in TO-220AB package, featuring low forward voltage (0.55 V at 10 A, 25°C), high surge current capability (200 A), and AEC-Q101 qualification option. It serves as a primary output rectifier in high-efficiency DC-DC converters for automotive infotainment power supplies.

For engineers reviewing the SR2040 datasheet, SR2040 pinout, SR2040 application, or SR2040 equivalent, key selection criteria include its 40 V V_RRM, 20 A continuous forward current rating, 1 °C/W junction-to-case thermal resistance, dual-die configuration, and compatibility with high-frequency switching topologies requiring low conduction loss.

Technical Context

The SR2040 employs a dual-die Schottky structure optimized for low VF and fast recovery, enabling operation in high-frequency SMPS without significant reverse recovery losses. Its 10,000 V/μs dv/dt rating supports robust noise immunity in noisy automotive environments.

Thermally, the device delivers 1 °C/W R_θJC in TO-220AB, allowing 20 A continuous conduction at case temperatures up to 100°C when properly heatsinked. The 125°C maximum junction temperature (standard grade) aligns with industrial-grade power conversion requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse blocking voltage; defines usable input/output voltage range in buck or flyback secondary-side rectification
I_F	20 A - Continuous forward current rating; supports ≥100 W output stages at typical efficiency targets
I_FSM	200 A - Non-repetitive surge current (8.3 ms half-sine); withstands inrush and transient overloads in adapter applications
V_F	0.55 V @ 10 A, 25°C - Low conduction loss enables >92% efficiency in 12 V output DC-DC converters
R_θJC	1 °C/W - Enables thermal design with standard TO-220 heatsinks for ambient temperatures up to 70°C
T_J max	125°C - Junction temperature limit for standard grade; supports operation in under-hood automotive ambient conditions
I_R	500 µA @ 40 V, 25°C - Low leakage preserves standby efficiency in energy-sensitive systems

Pinout & Package

Package: TO-220AB - Insulated case, matte tin-plated leads, UL 94V-0 molding compound, 1.80 g weight, polarity marked on device body.

Pin/Terminal	Circuit Role	Design Meaning
Anode 1	Input terminal for first Schottky die	Connects to transformer secondary or switch node; dual-anode configuration allows parallel or interleaved use
Cathode	Common output terminal	Shared cathode enables single-point output filtering; reduces PCB routing complexity vs. discrete dual diodes
Anode 2	Input terminal for second Schottky die	Enables dual-output or phase-split rectification; identical electrical specs to Anode 1
Case / Tab	Electrically connected to Cathode	Provides low-inductance thermal path to heatsink; must be isolated from chassis if cathode is not ground-referenced

Key Features

Feature	Design Value
Guard ring structure	Prevents edge breakdown at rated V_RRM, ensuring stable reverse blocking performance across temperature and process variation
AEC-Q101 qualified version available (SR2040H)	Validated for automotive power modules requiring reliability under temperature cycling, humidity, and mechanical shock per JESD22 standards
Dual-die configuration	Enables two independent 20 A paths in one footprint-reducing board area vs. two TO-220 devices while maintaining thermal symmetry
RoHS + halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for consumer and automotive end-equipment with strict material compliance requirements

Applications

Automotive DC-DC Converter	Industrial SMPS Secondary Rectifier
Use Scenario: 12 V to 5 V/3.3 V point-of-load converter in ADAS camera ECU with 15 W output requirement. IC Role / Device Role / Timing Role: Primary synchronous rectifier replacement; conducts during low-side switch conduction interval. Use Value: 0.55 V V_F reduces conduction loss by ~35% vs. comparable 45 V Si diode, improving full-load efficiency from 87% to 91%.	Use Scenario: 48 V input, 24 V output telecom power supply operating at 250 kHz switching frequency. IC Role / Device Role / Timing Role: Output rectifier in center-tapped forward converter topology. Use Value: Dual-die layout allows interleaved conduction, cutting output ripple current amplitude by 40% and easing filter capacitor sizing.
USB-C PD Adapter	Server VRM High-Density Module
Use Scenario: 20 V output stage in compact 65 W USB-C PD wall adapter with thermally constrained enclosure. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in active-clamp forward design. Use Value: 1 °C/W R_θJC enables 20 A operation with ≤25°C case rise using minimal heatsink, meeting UL thermal safety limits.	Use Scenario: 12 V input, 0.8 V output VRM for AI accelerator card requiring <10 mΩ total conduction path resistance. IC Role / Device Role / Timing Role: Parallel-configured low-VF rectifier in multiphase synchronous buck auxiliary rail. Use Value: Dual-anode terminals allow Kelvin sensing of each die's forward drop, supporting dynamic current balancing across phases.

Automotive DC-DC Converter

Industrial SMPS Secondary Rectifier

Use Scenario: 12 V to 5 V/3.3 V point-of-load converter in ADAS camera ECU with 15 W output requirement.

IC Role / Device Role / Timing Role: Primary synchronous rectifier replacement; conducts during low-side switch conduction interval.

Use Value: 0.55 V V_F reduces conduction loss by ~35% vs. comparable 45 V Si diode, improving full-load efficiency from 87% to 91%.

Use Scenario: 48 V input, 24 V output telecom power supply operating at 250 kHz switching frequency.

IC Role / Device Role / Timing Role: Output rectifier in center-tapped forward converter topology.

Use Value: Dual-die layout allows interleaved conduction, cutting output ripple current amplitude by 40% and easing filter capacitor sizing.

USB-C PD Adapter

Server VRM High-Density Module

Use Scenario: 20 V output stage in compact 65 W USB-C PD wall adapter with thermally constrained enclosure.

IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in active-clamp forward design.

Use Value: 1 °C/W R_θJC enables 20 A operation with ≤25°C case rise using minimal heatsink, meeting UL thermal safety limits.

Use Scenario: 12 V input, 0.8 V output VRM for AI accelerator card requiring <10 mΩ total conduction path resistance.

IC Role / Device Role / Timing Role: Parallel-configured low-VF rectifier in multiphase synchronous buck auxiliary rail.

Use Value: Dual-anode terminals allow Kelvin sensing of each die's forward drop, supporting dynamic current balancing across phases.

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-20BQ040-M3/45	Same 40 V V_RRM, 20 A I_F, but TO-220AC package (non-insulated tab); V_F = 0.52 V @ 10 A	Requires insulating washer for heatsink mounting; slightly lower VF improves conduction loss marginally	Select when thermal interface simplicity outweighs isolation needs and board-level creepage/clearance permits non-insulated tab
ON Semiconductor SB2040	Identical TO-220AB package and 40 V rating, but rated for 150°C T_J max and 100 µA I_R @ 40 V, 25°C	Better high-temp leakage performance suits extended-temperature industrial control systems	Select when operation above 105°C case temperature is required or when <100 µA standby leakage is mandatory

Compared with VS-20BQ040-M3/45 and SB2040, the SR2040 offers insulated TO-220AB packaging out-of-box, AEC-Q101 qualification path via SR2040H variant, and optimized cost-performance balance for mainstream automotive and industrial 40 V rectification where 125°C T_J suffices.

Availability

SR2040 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS secondary rectification, and USB-C PD adapters requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SR2040 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 automotive, industrial, and computing markets since 1979.

The SR20xx series was developed specifically for high-efficiency, high-reliability secondary-side rectification in automotive and industrial power supplies, emphasizing low VF, robust surge handling, and AEC-Q101 readiness.

FAQ

What is the maximum junction temperature rating for the SR2040?

The SR2040 has a maximum junction temperature (T_J) of 125°C for the standard grade. This rating applies under continuous operation with proper heatsinking and accounts for thermal derating per the forward current derating curve. The SR2040H variant maintains the same 125°C T_J max but adds AEC-Q101 qualification for automotive use cases.

Does the SR2040 have a built-in guard ring, and what function does it serve?

Yes, the SR2040 incorporates a guard ring structure. This feature prevents premature edge breakdown under high reverse bias, ensuring stable 40 V V_RRM performance across temperature, voltage stress, and manufacturing variation. It directly enhances reliability in automotive and industrial applications where voltage transients are common.

Is the SR2040 pin-compatible with other parts in the SR20xx family?

Yes, all SR20xx parts-including SR2020, SR2030, SR2040, SR2050, and up to SR20150-share identical TO-220AB package dimensions, pinout, and mechanical footprint. This allows direct voltage-rating substitution (e.g., SR2040 → SR2060) without PCB layout changes, provided thermal and electrical system margins accommodate the higher V_RRM and associated parameter shifts.

What is the forward voltage specification for the SR2040 at 20 A load?

The SR2040 datasheet specifies forward voltage (V_F) at 10 A, not 20 A. At 10 A and 25°C, V_F is 0.55 V (max). Extrapolating to 20 A using the typical forward characteristic curve shows V_F ≈ 0.62–0.65 V depending on junction temperature. For precise 20 A design validation, refer to Figure 4 (Typical Forward Characteristics) in the SR2020–SR20150 datasheet.

Can the SR2040 be used in surface-mount designs?

No, the SR2040 is only offered in through-hole TO-220AB package and is not compatible with surface-mount assembly processes. Its leaded construction, 1.80 g mass, and thermal design intent require screw or clip mounting to a heatsink. For SMT alternatives, consider TSC's SMC or D²PAK Schottky families with equivalent voltage/current ratings.

SR2040 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

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:: Through Hole

Supplier Device Package:: TO-220AB

SR2040 FAQ

1.How can I place an order for SR2040 through Aetrix?

Please submit a Request for Quotation (RFQ) for SR2040 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 SR2040 reliable?

The price and inventory of SR2040 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR2040 is usually 5 days.

3.What payment methods are accepted for SR2040?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR2040 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR2040?

SR2040 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR2040 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 SR2040?

For technical support, including SR2040 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR2040 requirements.

6.How does Aetrix verify that SR2040 is sourced from the original manufacturer or authorized distributors?

All SR2040 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 SR2040 meets industry standards.

7.What is the process for return or replacement of SR2040?

All SR2040 units undergo pre-shipment inspection (PSI). If there is an issue with SR2040, 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 SR2040 part is unused and in its original packaging.

Return procedure for SR2040:

1.Submit a request within 90 days.

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

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