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

Taiwan Semiconductor Corporation SR504 A0G

Name: SR504 A0G
Brand: Taiwan Semiconductor Corporation
SKU: SR504 A0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR504 A0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SR504 A0G.pdf

Description:: DIODE SCHOTTKY 40V 5A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:931

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Product details

Overview

SR504 A0G from Taiwan Semiconductor is a 5A, 40V Schottky barrier rectifier in DO-201AD package, designed for high-efficiency DC/DC conversion and SMPS output stages. It features 0.55V max forward voltage at 5A/25°C, 120A surge capability, 125°C max junction temperature, and AEC-Q101 qualification optional (not included in A0G variant).

For engineers reviewing the SR504 A0G datasheet, SR504 A0G pinout, SR504 A0G application, or SR504 A0G equivalent, key selection criteria include forward voltage drop at rated current, reverse leakage at elevated temperature, thermal resistance (R_θJA = 35°C/W), surge rating, and DO-201AD mechanical compatibility in high-density power layouts.

Technical Context

This single-die Schottky rectifier operates with unidirectional conduction and no minority-carrier storage delay. Its guard ring structure enhances ruggedness against transient overvoltage events, while pure tin-plated leads ensure J-STD-002 solderability and JESD201 Class 2 whisker resistance.

The device exhibits low reverse recovery charge (Q_rr ≈ 0 nC) due to majority-carrier conduction, enabling high-frequency switching up to several hundred kHz without commutation loss penalties. Reverse leakage remains ≤500 µA at 25°C and ≤15 mA at 100°C under rated 40V reverse bias.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for output capacitor and snubber design in 12–24V output rails.
I_F	5 A - Continuous average forward current at case temperature ≤75°C; defines minimum heatsinking requirement for sustained load.
V_F @ 5A, 25°C	≤0.55 V - Low conduction loss enables >92% efficiency in 5V/5A buck converter output stage at room temperature.
I_FSM	120 A - Non-repetitive 8.3ms surge rating; supports inrush current handling during cold-start of industrial power modules.
R_θJA	35 °C/W - Junction-to-ambient thermal resistance on FR-4 PCB with 1 sq-in copper pad; determines temperature rise under full load without forced air.
T_J max	125 °C - Maximum operating junction temperature; requires thermal derating above 75°C ambient in sealed enclosures.
I_R @ 40V, 100°C	≤15 mA - Reverse leakage at elevated temperature; impacts standby power loss in always-on auxiliary supplies.

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; 1.10g mass; UL 94V-0 molded compound; polarity indicated by single black band on cathode end.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Input current source node	Connected to switch node or transformer secondary; must withstand peak reverse voltage and di/dt stress.
Cathode (banded end)	Output current sink node	Connects to output capacitor and load; carries full DC output current plus ripple; lowest impedance path to ground return.

Key Features

Feature	Design Value
Low forward voltage drop	0.55 V max at 5A/25°C reduces conduction loss by ~30% vs. comparable 40V fast recovery diodes.
Guard ring overvoltage protection	Enhances ruggedness against line transients and inductive kickback in automotive and industrial DC/DC converters.
High surge current capability	120A non-repetitive rating supports repeated cold-start cycles without degradation in 24V system supplies.
RoHS & halogen-free compliance	Meets IEC 61249-2-21; suitable for consumer, industrial, and Tier-1 automotive sub-systems requiring green material declarations.

Applications

Server VRM Output Rectification	Industrial 24V DC/DC Converter
Use Scenario: High-current, high-frequency synchronous rectification replacement in 48V-to-12V server voltage regulator modules. IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier conducting during low-side FET off-time; critical for minimizing output ripple and thermal stress. Use Value: 0.55V V_F limits conduction loss to <1.4W at 5A, reducing heatsink size and improving power density vs. Si PN alternatives.	Use Scenario: Secondary-side rectification in isolated 24V input, 5V/3A industrial DC/DC power supply with wide ambient range. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated output; handles continuous 5A load and 120A surge during motor startup. Use Value: 125°C T_J max and 35°C/W R_θJA enable operation at 70°C ambient without forced cooling in enclosed DIN-rail mounts.
USB-C PD Adapter Output Stage	Automotive Body Control Module Supply
Use Scenario: 20V output rectification in compact 65W USB-C Power Delivery adapters with tight thermal constraints. IC Role / Device Role / Timing Role: Primary output rectifier in quasi-resonant flyback topology; conducts during transformer reset phase. Use Value: Low V_F and negligible Q_rr prevent efficiency drop at 100–300kHz switching, maintaining >90% efficiency across load range.	Use Scenario: 12V-to-5V local supply for microcontroller and CAN transceiver in body control unit with 40V load dump immunity. IC Role / Device Role / Timing Role: Input protection and rectification stage upstream of LDO; clamps reverse polarity and filters alternator ripple. Use Value: Guard ring structure sustains 40V reverse rating during ISO 7637-2 pulse 5a (load dump), avoiding catastrophic failure.

Server VRM Output Rectification

Industrial 24V DC/DC Converter

Use Scenario: High-current, high-frequency synchronous rectification replacement in 48V-to-12V server voltage regulator modules.

IC Role / Device Role / Timing Role: Freewheeling Schottky rectifier conducting during low-side FET off-time; critical for minimizing output ripple and thermal stress.

Use Value: 0.55V V_F limits conduction loss to <1.4W at 5A, reducing heatsink size and improving power density vs. Si PN alternatives.

Use Scenario: Secondary-side rectification in isolated 24V input, 5V/3A industrial DC/DC power supply with wide ambient range.

IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated output; handles continuous 5A load and 120A surge during motor startup.

Use Value: 125°C T_J max and 35°C/W R_θJA enable operation at 70°C ambient without forced cooling in enclosed DIN-rail mounts.

USB-C PD Adapter Output Stage

Automotive Body Control Module Supply

Use Scenario: 20V output rectification in compact 65W USB-C Power Delivery adapters with tight thermal constraints.

IC Role / Device Role / Timing Role: Primary output rectifier in quasi-resonant flyback topology; conducts during transformer reset phase.

Use Value: Low V_F and negligible Q_rr prevent efficiency drop at 100–300kHz switching, maintaining >90% efficiency across load range.

Use Scenario: 12V-to-5V local supply for microcontroller and CAN transceiver in body control unit with 40V load dump immunity.

IC Role / Device Role / Timing Role: Input protection and rectification stage upstream of LDO; clamps reverse polarity and filters alternator ripple.

Use Value: Guard ring structure sustains 40V reverse rating during ISO 7637-2 pulse 5a (load dump), avoiding catastrophic failure.

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-50SQ040	Same 5A/40V rating, TO-220AC package; R_θJA = 25°C/W (lower thermal resistance); VF = 0.52V typ.	Requires PCB footprint change and heatsink mounting; better for >5A continuous or higher ambient environments.	Select when thermal margin is constrained and board space allows TO-220 mounting.
ON Semiconductor SB540	5A/40V, DO-201AD package; VF = 0.55V max but IR = 1.0 mA @ 100°C (vs. 15 mA for SR504 A0G); T_J max = 125°C.	Lower leakage improves light-load efficiency in battery-backed systems; identical mechanical fit.	Prefer for always-on auxiliary rails where standby current below 1mA is critical.

Compared with VS-50SQ040 and SB540, the SR504 A0G offers optimal balance of DO-201AD compatibility, 120A surge robustness, and cost-effective performance for mid-power industrial and adapter designs-without requiring layout changes or premium packaging.

Availability

SR504 A0G 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 industrial availability.

Supply support for SR504 A0G 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 power, automotive, and industrial markets since 1979.

The SR502–SR520 series targets high-reliability, cost-sensitive power conversion applications where Schottky efficiency, surge resilience, and standardized DO-201AD assembly are prioritized over ultra-low leakage or AEC-Q101 certification.

FAQ

What is the maximum junction temperature rating for SR504 A0G?

The SR504 A0G has a maximum junction temperature (T_J) of 125°C. This rating applies under steady-state conditions with appropriate thermal management. Derating is required above 75°C ambient temperature per the forward current derating curve in the datasheet. The SR504 A0G does not share the 150°C option available in higher-voltage variants like SR509–SR520.

Is SR504 A0G AEC-Q101 qualified?

No, the SR504 A0G is not AEC-Q101 qualified. The "A0G" suffix denotes DO-201AD packaging in 500-unit ammo box packaging. AEC-Q101 qualification is indicated by the "H" or "HA0G" suffix (e.g., SR504H or SR504HA0G). The SR504 A0G meets industrial reliability standards but lacks automotive-grade stress test validation.

What is the reverse leakage current of SR504 A0G at 100°C?

At 100°C junction temperature and rated 40V reverse voltage, the SR504 A0G exhibits a maximum reverse leakage current (I_R) of 15 mA. This value is confirmed in the Electrical Specifications table on page 2 of the J2105 datasheet revision and reflects worst-case behavior under thermal stress in high-ambient environments.

Does SR504 A0G have the same pinout as other DO-201AD Schottky rectifiers?

Yes, the SR504 A0G uses the standard DO-201AD axial package with anode at the unbanded lead and cathode at the banded lead-identical pinout to industry-standard equivalents like SB540, 1N5822, and MBR540. No PCB redesign is needed when substituting within the same package outline and polarity marking convention.

What is the thermal resistance from junction to ambient for SR504 A0G?

The SR504 A0G has a junction-to-ambient thermal resistance (R_θJA) of 35°C/W when mounted on a standard FR-4 PCB with 1 square inch of 2-oz copper on the component side. This value assumes natural convection and is used to calculate temperature rise: ΔT = R_θJA × P_loss. R_θJC is 6°C/W for case-to-heatsink interface evaluation.

SR504 A0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Cut Tape (CT)

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:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

Operating Temperature - Junction:: -55°C ~ 150°C

SR504 A0G FAQ

1.How can I place an order for SR504 A0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SR504 A0G 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 SR504 A0G reliable?

The price and inventory of SR504 A0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR504 A0G is usually 5 days.

3.What payment methods are accepted for SR504 A0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR504 A0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR504 A0G?

SR504 A0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR504 A0G 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 SR504 A0G?

For technical support, including SR504 A0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR504 A0G requirements.

6.How does Aetrix verify that SR504 A0G is sourced from the original manufacturer or authorized distributors?

All SR504 A0G 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 SR504 A0G meets industry standards.

7.What is the process for return or replacement of SR504 A0G?

All SR504 A0G units undergo pre-shipment inspection (PSI). If there is an issue with SR504 A0G, 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 SR504 A0G part is unused and in its original packaging.

Return procedure for SR504 A0G:

1.Submit a request within 90 days.

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

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