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

Taiwan Semiconductor Corporation SR504H

Name: SR504H
Brand: Taiwan Semiconductor Corporation
SKU: SR504H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR504H

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SR504H.pdf

Description:: DIODE SCHOTTKY 40V 5A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:9,894

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Product details

Overview

SR504H from Taiwan Semiconductor is an AEC-Q101 qualified 5A, 40V Schottky barrier rectifier in DO-201AD package, featuring low forward voltage (0.55 V at 5A, 25°C), high surge current capability (120 A), and guard ring overvoltage protection - deployed in automotive-grade DC/DC converters and industrial power adapters.

For engineers reviewing the SR504H datasheet, SR504H pinout, SR504H application, or SR504H equivalent, key selection criteria include its 40 V repetitive peak reverse voltage, 125°C maximum junction temperature, RoHS/halogen-free compliance, and suitability for high-efficiency switching power supplies requiring robust thermal performance and AEC-Q101 reliability validation.

Technical Context

This single-die Schottky rectifier operates with a low VF to minimize conduction loss in high-frequency switching topologies. Its 10,000 V/µs critical dv/dt rating supports stable operation under fast transient conditions in SMPS and DC/DC stages.

The device uses pure tin-plated leads compliant with J-STD-002 solderability and meets JESD201 Class 2 whisker resistance. Thermal design is enabled by R_θJA = 35°C/W and R_θJC = 6°C/W, supporting continuous 5A operation within defined junction temperature limits.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 36V nominal automotive or 24V industrial bus applications.
I_F	5 A - Continuous average forward current; supports mid-power converter output stages without forced air cooling.
V_F	0.55 V @ 5A, 25°C - Low conduction loss enables >92% efficiency in 12V–24V output buck converters.
I_FSM	120 A - Non-repetitive surge rating allows tolerance of inrush and fault transients in unregulated input stages.
T_J max	125°C - Junction temperature limit compatible with under-hood automotive environments per AEC-Q101 stress testing.
R_θJA	35°C/W - Enables thermal management on standard FR-4 PCBs with minimal copper area for 5A steady-state operation.
Package	DO-201AD - Industry-standard axial leaded package with cathode band polarity marking and UL 94V-0 molding compound.

Pinout & Package

DO-201AD package: axial-leaded, single-diode configuration with cathode indicated by a painted band on the body. Leads are pure tin-plated and solderable per J-STD-002. Polarity-sensitive mounting required.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry point	Connected to lower-potential side (e.g., switch node in synchronous rectification or input rail in freewheeling path).
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to higher-potential output or return path; reverse voltage applied between cathode and anode.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive electronics per stress test requirements including HTOL, TC, HTRB, and UHAST - enables use in engine control, ADAS, and infotainment power rails.
Guard ring structure	Enhances edge termination robustness against localized electric field crowding, improving reliability under repetitive overvoltage transients up to V_RRM.
Low I_R @ 100°C	15 mA max reverse leakage at 100°C ensures minimal standby power loss in thermally stressed DC/DC modules.
RoHS & halogen-free	Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements.

Applications

Automotive DC/DC Converters	Industrial Power Adapters
Use Scenario: Step-down conversion from 48V battery to 12V subsystem rail in mild-hybrid vehicles. IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology, conducting during low-side switch off-time. Use Value: 0.55 V V_F reduces conduction loss by ~30% vs. comparable 40V Si diodes, directly improving system efficiency and thermal margin.	Use Scenario: Secondary-side rectification in universal-input 24V/5A wall-mounted industrial adapter. IC Role / Device Role / Timing Role: Freewheeling diode in flyback or forward converter output stage. Use Value: 120 A I_FSM withstands cold-start inrush surges without degradation, extending product lifetime in factory automation equipment.
Telecom Power Supplies	LED Driver Power Stages
Use Scenario: OR-ing diode in redundant 48V telecom rectifier modules. IC Role / Device Role / Timing Role: Unidirectional current path enabling hot-swap redundancy with minimal forward drop penalty. Use Value: Low V_F minimizes voltage mismatch between parallel power feeds, reducing circulating current and thermal imbalance.	Use Scenario: High-efficiency constant-current LED driver for outdoor signage with 36V string voltage. IC Role / Device Role / Timing Role: Output rectifier in boost-derived topology handling 5A continuous LED load current. Use Value: 125°C T_J max supports sealed, thermally constrained enclosures without derating at ambient temperatures up to 85°C.

Automotive DC/DC Converters

Industrial Power Adapters

Use Scenario: Step-down conversion from 48V battery to 12V subsystem rail in mild-hybrid vehicles.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or asynchronous buck topology, conducting during low-side switch off-time.

Use Value: 0.55 V V_F reduces conduction loss by ~30% vs. comparable 40V Si diodes, directly improving system efficiency and thermal margin.

Use Scenario: Secondary-side rectification in universal-input 24V/5A wall-mounted industrial adapter.

IC Role / Device Role / Timing Role: Freewheeling diode in flyback or forward converter output stage.

Use Value: 120 A I_FSM withstands cold-start inrush surges without degradation, extending product lifetime in factory automation equipment.

Telecom Power Supplies

LED Driver Power Stages

Use Scenario: OR-ing diode in redundant 48V telecom rectifier modules.

IC Role / Device Role / Timing Role: Unidirectional current path enabling hot-swap redundancy with minimal forward drop penalty.

Use Value: Low V_F minimizes voltage mismatch between parallel power feeds, reducing circulating current and thermal imbalance.

Use Scenario: High-efficiency constant-current LED driver for outdoor signage with 36V string voltage.

IC Role / Device Role / Timing Role: Output rectifier in boost-derived topology handling 5A continuous LED load current.

Use Value: 125°C T_J max supports sealed, thermally constrained enclosures without derating at ambient temperatures up to 85°C.

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-50SQ040ST	Same 40V V_RRM, 5A I_F, but TO-220AC package; higher R_θJA (50°C/W) and no AEC-Q101 qualification.	Requires heatsink for 5A continuous operation; not approved for automotive under-hood use.	Select when board space permits TO-220 mounting and AEC-Q101 is not required.
ON Semiconductor SB540-E3/54	40V V_RRM, 5A I_F, DO-201AD package, but rated only to 125°C TJ and not AEC-Q101 qualified.	Lacks automotive stress validation; reverse leakage at 100°C is 20 mA (vs. SR504H's 15 mA max).	Acceptable for industrial adapters where AEC-Q101 is unnecessary and slightly higher leakage is tolerable.

Compared with VS-50SQ040ST and SB540-E3/54, the SR504H uniquely combines DO-201AD form factor, AEC-Q101 qualification, and 15 mA max I_R at 100°C - making it the only option among the three validated for automotive-grade 40V rectification without thermal derating or package change.

Availability

SR504H is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial power adapters, and telecom rectifier modules requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.

Supply support for SR504H 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 devices, and MOSFETs for industrial and automotive markets.

The SR500 series was designed specifically for high-reliability, medium-current Schottky rectification in automotive and industrial power conversion - emphasizing low VF, AEC-Q101 qualification, and robust thermal performance in standard DO-201AD packaging.

FAQ

What is the peak repetitive reverse voltage rating of the SR504H?

The SR504H has a peak repetitive reverse voltage (V_RRM) rating of 40 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version J2105), and defines the maximum reverse-biased voltage the device can block continuously without breakdown under normal operating conditions.

Is the SR504H qualified to AEC-Q101 standards?

Yes, the SR504H is explicitly AEC-Q101 qualified, as indicated by the "H" suffix in its ordering code and confirmed in the FEATURES section of the Taiwan Semiconductor datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for automotive under-hood applications.

What is the forward voltage drop of the SR504H at 5A and 25°C?

The SR504H exhibits a maximum forward voltage drop (V_F) of 0.55 V at 5 A forward current and 25°C junction temperature, per the Electrical Specifications table. This value is measured under pulsed conditions (PW = 0.3 ms) and represents the conduction loss baseline for efficiency calculations in switching power supplies.

Does the SR504H have a specified junction-to-ambient thermal resistance?

Yes, the SR504H has a typical junction-to-ambient thermal resistance (R_θJA) of 35°C/W, as published in the THERMAL PERFORMANCE section of the datasheet. This value assumes standard mounting on FR-4 PCB with minimum copper pad area and is used to estimate junction temperature rise under steady-state 5A operation.

What package type does the SR504H use, and how is polarity marked?

The SR504H uses the DO-201AD axial-leaded package. Polarity is marked by a cathode band - a painted stripe on the body near one lead - identifying the cathode terminal. The unmarked lead is the anode, consistent with industry-standard Schottky diode marking conventions.

SR504H Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Schottky

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

Current - Average Rectified (Io):: 5A

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

Capacitance @ Vr, F:: -

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SR504H FAQ

1.How can I place an order for SR504H through Aetrix?

Please submit a Request for Quotation (RFQ) for SR504H 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 SR504H reliable?

The price and inventory of SR504H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR504H is usually 5 days.

3.What payment methods are accepted for SR504H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR504H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR504H?

SR504H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR504H 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 SR504H?

For technical support, including SR504H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR504H requirements.

6.How does Aetrix verify that SR504H is sourced from the original manufacturer or authorized distributors?

All SR504H 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 SR504H meets industry standards.

7.What is the process for return or replacement of SR504H?

All SR504H units undergo pre-shipment inspection (PSI). If there is an issue with SR504H, 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 SR504H part is unused and in its original packaging.

Return procedure for SR504H:

1.Submit a request within 90 days.

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

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