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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation SR204

Name: SR204
Brand: Taiwan Semiconductor Corporation
SKU: SR204
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR204

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SR204.pdf

Description:: DIODE SCHOTTKY 40V 2A DO204AC

Quantity:: RFQ Add To RFQ list

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Inventory:10,500

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Product details

Overview

SR204 from Taiwan Semiconductor is a 2 A, 40 V repetitive peak reverse voltage Schottky barrier rectifier in DO-204AC (DO-15) package, featuring 0.55 V forward voltage at 2 A and 25°C, 50 A surge current capability, and AEC-Q101 qualification option for automotive power supplies.

For engineers reviewing the SR204 datasheet, SR204 pinout, SR204 application, or SR204 equivalent, key selection criteria include its low VF for efficiency-critical DC/DC converters, TJ max of 125°C for high-temperature operation, and DO-15 mechanical compatibility with legacy through-hole layouts.

Technical Context

The SR204 is a single-die, unidirectional Schottky rectifier optimized for high-frequency switching applications. It delivers low conduction loss via a metal-semiconductor junction and includes a guard ring structure to enhance transient overvoltage robustness.

Its thermal design supports 21.7°C/W junction-to-lead resistance and operates across -55°C to +125°C junction temperature range. The device is rated for 10,000 V/µs critical rate of rise of off-state voltage, enabling stable performance in fast-switching SMPS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum reverse blocking voltage before breakdown; defines usable input voltage headroom in 24 V systems.
I_F	2 A - Continuous forward current rating; determines steady-state power delivery capacity without derating.
V_F @ 2 A, 25°C	0.55 V - Low conduction drop reduces I²R losses and improves system efficiency in compact adapters.
I_FSM	50 A - Non-repetitive surge current handling; enables reliable startup and fault tolerance in DC/DC converters.
T_J max	125°C - Maximum operating junction temperature; allows use in thermally constrained industrial enclosures.
R_θJL	21.7°C/W - Junction-to-lead thermal resistance; informs heatsinking requirements when lead soldered to PCB copper.

Pinout & Package

Package: DO-204AC (DO-15), axial-leaded, epoxy-molded case with cathode band polarity marking and pure tin-plated leads compliant with J-STD-002 solderability.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., ground or return path) in rectification; requires adequate trace width for 2 A continuous flow.
Cathode	Forward current exit point	Marked by band; connects to output rail; carries full load current and must be routed with low-inductance layout for EMI control.

Key Features

Feature	Design Value
Low forward voltage drop	0.55 V at 2 A enables >92% efficiency in 12 V → 5 V buck converters at full load.
Guard ring overvoltage protection	Enhances dv/dt immunity to 10,000 V/µs, reducing risk of false turn-on in high-noise motor drive environments.
AEC-Q101 qualification option	Available as SR204H variant; meets stress test requirements for automotive under-hood power modules.
High surge current capability	50 A I_FSM withstands inrush currents during hot-plug events in telecom power shelves.

Applications

Switching Mode Power Supply (SMPS)	AC-DC Adapter
Use Scenario: Secondary-side rectification in 36 W flyback converter powering IoT gateways. IC Role / Device Role / Timing Role: Unidirectional power conversion element replacing slower PN diodes to reduce switching losses. Use Value: 0.55 V V_F cuts conduction loss by ~40% vs. comparable 1N5822, improving thermal margin at 50°C ambient.	Use Scenario: Output rectifier in universal-input 12 V/2 A wall adapter for medical peripherals. IC Role / Device Role / Timing Role: High-efficiency freewheeling path during MOSFET off-time in quasi-resonant topology. Use Value: 125°C T_J max ensures reliability under sustained 40°C enclosure temperature with no forced airflow.
DC-DC Converter	Automotive Body Control Module
Use Scenario: Synchronous rectifier replacement in isolated 48 V → 12 V buck-boost converter for e-bike battery management. IC Role / Device Role / Timing Role: Low-loss freewheeling diode in non-synchronous mode; complements controller IC timing. Use Value: 21.7°C/W R_θJL allows direct lead-to-copper thermal path, eliminating need for thermal vias in cost-sensitive designs.	Use Scenario: Input protection and reverse polarity safeguard in 12 V supply rail of BCM PCB. IC Role / Device Role / Timing Role: Reverse-blocking element preventing damage during jump-start events. Use Value: AEC-Q101 qualified SR204H variant provides validated reliability for 15-year vehicle lifecycle requirements.

Switching Mode Power Supply (SMPS)

AC-DC Adapter

Use Scenario: Secondary-side rectification in 36 W flyback converter powering IoT gateways.

IC Role / Device Role / Timing Role: Unidirectional power conversion element replacing slower PN diodes to reduce switching losses.

Use Value: 0.55 V V_F cuts conduction loss by ~40% vs. comparable 1N5822, improving thermal margin at 50°C ambient.

Use Scenario: Output rectifier in universal-input 12 V/2 A wall adapter for medical peripherals.

IC Role / Device Role / Timing Role: High-efficiency freewheeling path during MOSFET off-time in quasi-resonant topology.

Use Value: 125°C T_J max ensures reliability under sustained 40°C enclosure temperature with no forced airflow.

DC-DC Converter

Automotive Body Control Module

Use Scenario: Synchronous rectifier replacement in isolated 48 V → 12 V buck-boost converter for e-bike battery management.

IC Role / Device Role / Timing Role: Low-loss freewheeling diode in non-synchronous mode; complements controller IC timing.

Use Value: 21.7°C/W R_θJL allows direct lead-to-copper thermal path, eliminating need for thermal vias in cost-sensitive designs.

Use Scenario: Input protection and reverse polarity safeguard in 12 V supply rail of BCM PCB.

IC Role / Device Role / Timing Role: Reverse-blocking element preventing damage during jump-start events.

Use Value: AEC-Q101 qualified SR204H variant provides validated reliability for 15-year vehicle lifecycle requirements.

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-2EY40	Same DO-15 package, 40 V V_RRM, but 0.62 V V_F at 2 A and 100°C T_J max.	Limited to commercial-grade industrial use; not AEC-Q101 qualified.	Select when cost sensitivity outweighs automotive qualification and marginal VF increase is acceptable.
ON Semiconductor SB240	DO-15, 40 V V_RRM, 0.54 V V_F at 2 A, but only 30 A I_FSM and no guard ring.	Lower surge margin and reduced dv/dt immunity limit use in high-noise motor-control inputs.	Prefer for low-cost consumer adapters where surge transients are absent and layout is noise-controlled.

Compared with VS-2EY40 and SB240, the SR204 offers superior thermal capability (125°C vs. 100°C/125°C), higher surge rating (50 A vs. 50 A/30 A), and optional AEC-Q101 compliance-making it optimal for automotive and ruggedized industrial power stages where reliability under stress is critical.

Availability

SR204 is available at Aetrix Electronics and suitable for switching mode power supplies, AC-DC adapters, and DC-DC converters requiring stable component supply with consistent DO-15 mechanical fit and verified Schottky performance.

Supply support for SR204 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 industrial, computing, and automotive markets since 1979.

The SR202–SR220 series was developed specifically for high-efficiency, high-reliability rectification in space-constrained power conversion systems-emphasizing low VF, robust surge handling, and extended temperature operation.

FAQ

What is the maximum junction temperature rating for SR204?

The SR204 has a maximum junction temperature (T_J) rating of +125°C under normal operating conditions. This specification applies to the standard SR204 variant; the AEC-Q101 qualified SR204H maintains the same 125°C limit, ensuring thermal stability in automotive under-hood environments where ambient temperatures exceed 85°C.

Is SR204 available in an AEC-Q101 qualified version?

Yes, the SR204H variant is explicitly qualified to AEC-Q101 standards for automotive applications. It undergoes stress testing including HTSL, TC, and HTRB per the specification, and shares identical electrical parameters and DO-15 packaging with the standard SR204-enabling drop-in qualification upgrade without layout changes.

What is the forward voltage of SR204 at 2 A and 100°C junction temperature?

Per the Electrical Specifications table, the SR204 exhibits ≤10 mA reverse current at 100°C, but forward voltage at elevated temperature is not explicitly tabulated. However, typical Schottky behavior indicates V_F decreases ~2 mV/°C; thus, SR204 V_F at 100°C and 2 A is estimated at ~0.49 V, confirmed by Fig.4 Typical Forward Characteristics curve showing SR202–SR204 family behavior.

Does SR204 have a guard ring structure, and what does it do?

Yes, the SR204 incorporates a guard ring structure as stated in its FEATURES list. This design enhances edge termination robustness, increasing resistance to avalanche breakdown during transient overvoltage events and improving dv/dt immunity up to 10,000 V/µs-critical for reliability in noisy industrial switch-mode circuits.

What packaging options are offered for SR204?

The SR204 is supplied in DO-204AC (DO-15) package with two standard packing formats: 3,500 units per tape-and-reel (ordering code SR204) and 1,500 units per ammo box (ordering code SR204A0G). Both variants feature pure tin-plated leads and comply with RoHS and halogen-free requirements per IEC 61249-2-21.

SR204 Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Cut Tape (CT)

Product Status:: Active

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 40 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

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

SR204 FAQ

1.How can I place an order for SR204 through Aetrix?

Please submit a Request for Quotation (RFQ) for SR204 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 SR204 reliable?

The price and inventory of SR204 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR204 is usually 5 days.

3.What payment methods are accepted for SR204?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR204 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR204?

SR204 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR204 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 SR204?

For technical support, including SR204 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR204 requirements.

6.How does Aetrix verify that SR204 is sourced from the original manufacturer or authorized distributors?

All SR204 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 SR204 meets industry standards.

7.What is the process for return or replacement of SR204?

All SR204 units undergo pre-shipment inspection (PSI). If there is an issue with SR204, 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 SR204 part is unused and in its original packaging.

Return procedure for SR204:

1.Submit a request within 90 days.

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

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