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

Taiwan Semiconductor Corporation SR502 R0G

Name: SR502 R0G
Brand: Taiwan Semiconductor Corporation
SKU: SR502 R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR502 R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SR502 R0G.pdf

Description:: DIODE SCHOTTKY 20V 5A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:9,084

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Product details

Overview

SR502 R0G from Taiwan Semiconductor is a 5A, 20V AEC-Q101-qualified Schottky barrier rectifier in DO-201AD package, featuring 0.55V max forward voltage at 5A/25°C, 120A surge capability, and guard-ring overvoltage protection - used in high-efficiency AC/DC adapters and DC-DC converters.

For engineers reviewing the SR502 R0G datasheet, SR502 R0G pinout, SR502 R0G application, or SR502 R0G equivalent, key selection criteria include its 20V V_RRM, 125°C max junction temperature, DO-201AD thermal resistance (R_θJA = 35°C/W), low I_R ≤ 500 µA at 25°C, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This single-die Schottky rectifier operates with unidirectional conduction and uses a guard ring structure to enhance dv/dt immunity (10,000 V/µs) and transient overvoltage robustness. Its pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.

The device delivers high efficiency via low conduction loss (VF ≤ 0.55 V @ 5A, 25°C) and supports continuous operation up to 125°C junction temperature, with derating to zero average current at 150°C ambient per thermal curves. R_θJC = 6°C/W enables effective heat transfer to PCB copper or heatsink.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	20 V - Maximum repetitive reverse blocking voltage; defines minimum input/output isolation margin in 12–24 V DC-DC stages.
I_F	5 A - Continuous average forward current; supports 60 W+ power conversion at typical efficiency levels.
I_FSM	120 A - Non-repetitive surge rating (8.3 ms half-sine); handles inrush and fault transients in SMPS primary-side rectification.
V_F @ 5A, 25°C	≤ 0.55 V - Low conduction loss reduces thermal load and improves system efficiency vs. standard PN diodes.
R_θJA	35 °C/W - Junction-to-ambient thermal resistance in standard JEDEC PCB layout; determines required copper area for thermal management.
T_J max	125 °C - Maximum operating junction temperature; enables use in sealed enclosures without active cooling.
I_R @ V_R=20V, 25°C	≤ 500 µA - Low leakage preserves standby power budget in energy-sensitive adapter designs.

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; body length 7.62 mm, diameter 2.72 mm, lead spacing 5.08 mm; RoHS-compliant, halogen-free molding compound (UL 94V-0), pure tin-plated leads.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., transformer secondary center-tap or buck converter switch node).
Cathode	Forward current exit / reverse-blocking terminal	Marked by band; ties to output rail or filter capacitor positive; must withstand full V_RRM during off-state.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive under-hood and infotainment power supplies requiring stress-tested reliability.
Guard ring structure	Improves ruggedness against voltage transients and edge breakdown, enabling stable operation in noisy SMPS environments.
Low V_F (≤ 0.55 V)	Reduces conduction loss by >40% vs. comparable 20V fast recovery diodes, lowering thermal design burden.
J-STD-002 solderable leads	Ensures consistent wetting and joint integrity during wave or reflow assembly without flux additives.
120 A I_FSM	Withstands repeated cold-start surges in 50–100 W adapters without degradation or parametric shift.

Applications

AC/DC Adapters	DC-DC Converters
Use Scenario: 12–24 V output wall adapters for consumer electronics and industrial peripherals. IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter secondary side. Use Value: 0.55 V V_F minimizes dropout and thermal rise at 5 A load, supporting compact form factors.	Use Scenario: Point-of-load (POL) modules in telecom base stations and network switches. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in non-isolated buck topologies. Use Value: Low leakage (≤500 µA) maintains tight regulation during light-load burst-mode operation.
Automotive Infotainment Power	Industrial SMPS
Use Scenario: 12 V input power rails for head units, display controllers, and USB hubs. IC Role / Device Role / Timing Role: Input or output rectifier in AEC-Q101-compliant auxiliary power supplies. Use Value: AEC-Q101 qualification ensures validated performance across -40°C to +125°C ambient range.	Use Scenario: DIN-rail mounted 24 V/48 V industrial PSUs with high reliability requirements. IC Role / Device Role / Timing Role: Primary-side snubber or secondary-side freewheeling diode. Use Value: 10,000 V/µs dv/dt rating prevents false turn-on during fast-switching MOSFET transitions.

AC/DC Adapters

DC-DC Converters

Use Scenario: 12–24 V output wall adapters for consumer electronics and industrial peripherals.

IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter secondary side.

Use Value: 0.55 V V_F minimizes dropout and thermal rise at 5 A load, supporting compact form factors.

Use Scenario: Point-of-load (POL) modules in telecom base stations and network switches.

IC Role / Device Role / Timing Role: Synchronous rectifier replacement in non-isolated buck topologies.

Use Value: Low leakage (≤500 µA) maintains tight regulation during light-load burst-mode operation.

Automotive Infotainment Power

Industrial SMPS

Use Scenario: 12 V input power rails for head units, display controllers, and USB hubs.

IC Role / Device Role / Timing Role: Input or output rectifier in AEC-Q101-compliant auxiliary power supplies.

Use Value: AEC-Q101 qualification ensures validated performance across -40°C to +125°C ambient range.

Use Scenario: DIN-rail mounted 24 V/48 V industrial PSUs with high reliability requirements.

IC Role / Device Role / Timing Role: Primary-side snubber or secondary-side freewheeling diode.

Use Value: 10,000 V/µs dv/dt rating prevents false turn-on during fast-switching MOSFET transitions.

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-50WQ03FNTR-M3	30 V V_RRM, same 5 A I_F, VF = 0.45 V @ 5 A, TO-220AC package	Higher thermal mass but requires mounting hardware; not axial-leaded	Select when higher surge margin or heatsink integration is needed; not drop-in for DO-201AD footprint.
ON Semiconductor SB520-E3/54	20 V V_RRM, 5 A I_F, VF = 0.52 V @ 5 A, DO-201AD package, no AEC-Q101	Lacks automotive qualification; identical mechanical fit and electrical envelope	Choose for cost-sensitive non-automotive applications where AEC-Q101 is not mandated.

Compared with VS-50WQ03FNTR-M3 and SB520-E3/54, SR502 R0G uniquely combines AEC-Q101 compliance, DO-201AD axial form factor, and 20 V/5 A rating optimized for space-constrained automotive and adapter designs - offering verified reliability without layout change or thermal redesign.

Availability

SR502 R0G is available at Aetrix Electronics and suitable for AC/DC adapters, DC-DC converters, and automotive infotainment power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for SR502 R0G 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 devices, rectifiers, and protection components since 1979.

The SR502 R0G belongs to TSC's AEC-Q101-qualified Schottky rectifier product line, engineered for high-efficiency, high-reliability power conversion in automotive, industrial, and consumer power supplies.

FAQ

What is the maximum junction temperature rating for SR502 R0G?

The SR502 R0G has a maximum junction temperature (T_J) of +125°C under continuous operation. It supports short-term exposure up to +150°C per derating curves, but sustained operation above 125°C requires thermal design validation using its R_θJA = 35°C/W and R_θJC = 6°C/W values. The SR502 R0G datasheet specifies this limit in Absolute Maximum Ratings Table 1.

Is SR502 R0G pin-compatible with other SR5xx series parts?

Yes - all SR5xx parts including SR502 R0G share identical DO-201AD package dimensions, anode/cathode polarity marking, and lead finish. However, V_RRM varies (20–200 V), so substituting SR502 R0G for SR510 or SR520 risks reverse breakdown. The SR502 R0G is mechanically interchangeable but electrically distinct.

Does SR502 R0G meet automotive qualification standards?

Yes - SR502 R0G is AEC-Q101 qualified, confirmed in the "Features" section and Ordering Information table (suffix "H" denotes qualification; "R0G" indicates green, halogen-free variant). This validates its suitability for automotive power supplies, including infotainment and body control modules. The SR502 R0G qualification report is available upon request from Taiwan Semiconductor.

What is the forward voltage specification for SR502 R0G at 5 A and 100°C junction temperature?

The SR502 R0G datasheet does not specify V_F at 100°C - only at 25°C (≤ 0.55 V) and 125°C (not published). However, typical Schottky V_F decreases ~2 mV/°C, so at 100°C it would be approximately 0.45–0.48 V. For design-critical applications, the SR502 R0G should be modeled using the Fig.4 Forward Characteristics curve or validated with thermal testing.

How is polarity indicated on the SR502 R0G package?

Polarity is indicated by a cathode band - a single black or dark-colored stripe near one end of the DO-201AD cylindrical body. That banded end is the cathode terminal; the opposite end is the anode. This marking aligns with JEDEC DO-201AD standard and is visible in the Marking Diagram on page 6 of the SR502 R0G datasheet.

SR502 R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-201AD, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 20 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 @ 20 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SR502 R0G FAQ

1.How can I place an order for SR502 R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SR502 R0G 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 SR502 R0G reliable?

The price and inventory of SR502 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR502 R0G is usually 5 days.

3.What payment methods are accepted for SR502 R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR502 R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR502 R0G?

SR502 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR502 R0G 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 SR502 R0G?

For technical support, including SR502 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR502 R0G requirements.

6.How does Aetrix verify that SR502 R0G is sourced from the original manufacturer or authorized distributors?

All SR502 R0G 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 SR502 R0G meets industry standards.

7.What is the process for return or replacement of SR502 R0G?

All SR502 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR502 R0G, 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 SR502 R0G part is unused and in its original packaging.

Return procedure for SR502 R0G:

1.Submit a request within 90 days.

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

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