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

Taiwan Semiconductor Corporation SR505 R0G

Name: SR505 R0G
Brand: Taiwan Semiconductor Corporation
SKU: SR505 R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR505 R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SR505 R0G.pdf

Description:: DIODE SCHOTTKY 50V 5A DO201AD

Quantity:: RFQ Add To RFQ list

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Inventory:4,196

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Product details

Overview

SR505 R0G from Taiwan Semiconductor is a 5A, 50V Schottky barrier rectifier in DO-201AD package, featuring 0.70V max forward voltage at 5A and 120A surge capability, used in high-efficiency DC/DC converters and industrial power adapters.

For engineers reviewing the SR505 R0G datasheet, SR505 R0G pinout, SR505 R0G application, or SR505 R0G equivalent, key selection criteria include V_RRM = 50 V, I_F = 5 A, T_J up to +150°C, low VF for thermal efficiency, and AEC-Q101 qualification status (R0G suffix indicates standard grade, not AEC-Q101).

Technical Context

This single-die Schottky rectifier operates with guard ring overvoltage protection and supports repetitive reverse voltages up to 50 V. Its 6°C/W junction-to-case thermal resistance enables effective heat transfer in compact power designs.

Rated for continuous forward current of 5 A at case temperature ≤85°C, it delivers stable performance across -55°C to +150°C junction range and withstands 8.3 ms half-sine surge currents up to 120 A without degradation.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse voltage; defines safe blocking capability in DC/DC flyback or buck output stage
I_F	5 A - Continuous average forward current; sets minimum heatsink requirement at rated ambient
V_F @ 5A, 25°C	≤0.70 V - Low conduction loss; reduces power dissipation to ≤3.5 W at full load
I_FSM	120 A - Non-repetitive surge rating; handles inrush and transient overload without failure
T_J max	+150°C - Extended junction temperature rating; supports operation in sealed or high-ambient environments
R_θJC	6°C/W - Thermal resistance from junction to case; enables direct mounting to metal chassis for passive cooling
I_R @ 50V, 25°C	≤500 µA - Low leakage; minimizes standby power loss in energy-sensitive applications

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, J-STD-002 solderable, and meet JESD201 Class 2 whisker resistance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry point	Connected to lower-potential side (e.g., ground or switch node) in freewheeling path
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to output rail; blocks reverse voltage during off-state of switching transistor

Key Features

Feature	Design Value
Guard ring structure	Enhances ruggedness against transient overvoltage events without external snubbers
Low V_F (≤0.70 V)	Reduces conduction loss by ~30% vs. comparable 50V silicon rectifiers, improving system efficiency
120 A I_FSM	Supports high-energy input surges common in automotive and industrial 24V/48V systems
UL 94V-0 molding compound	Meets flame-retardancy requirements for enclosed power supplies and safety-critical enclosures
RoHS & halogen-free	Complies with IPC-J-STD-609 and IEC 61249-2-21 for environmentally regulated production

Applications

Industrial DC/DC Converter	Telecom Power Adapter
Use Scenario: Secondary-side synchronous rectification in isolated 48V-to-12V telecom brick converters operating at 200–500 kHz. IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side MOSFET off-time. Use Value: 0.70 V V_F limits conduction loss to 3.5 W at 5 A, reducing thermal stress on PCB layout and enabling smaller heatsinks.	Use Scenario: Output rectification in universal-input (90–264 VAC), 65W AC/DC adapter for network infrastructure equipment. IC Role / Device Role / Timing Role: Output rectifier in discontinuous conduction mode (DCM) flyback topology. Use Value: 120 A surge rating absorbs line-induced transients; 150°C T_J max ensures reliability under sustained 50°C ambient + self-heating.
Automotive Body Control Module	Programmable Logic Controller (PLC) Power Supply
Use Scenario: Reverse polarity protection and load dump clamping in 12V auxiliary power rails of BCMs. IC Role / Device Role / Timing Role: Unidirectional current valve preventing battery reversal damage and absorbing ISO 7637-2 pulse 5a energy. Use Value: Guard ring design sustains >100 V transient spikes; 50 V V_RRM provides margin above nominal 14 V system voltage.	Use Scenario: Input rectification in 24V DC-powered PLC I/O module with wide-temperature operation (-40°C to +70°C ambient). IC Role / Device Role / Timing Role: Primary AC input rectifier feeding bulk capacitor in unregulated linear or buck-derived supply. Use Value: -55°C to +150°C T_J range ensures startup at cold ambient and stability under full-load enclosure heating.

Industrial DC/DC Converter

Telecom Power Adapter

Use Scenario: Secondary-side synchronous rectification in isolated 48V-to-12V telecom brick converters operating at 200–500 kHz.

IC Role / Device Role / Timing Role: Freewheeling diode providing low-loss current path during high-side MOSFET off-time.

Use Value: 0.70 V V_F limits conduction loss to 3.5 W at 5 A, reducing thermal stress on PCB layout and enabling smaller heatsinks.

Use Scenario: Output rectification in universal-input (90–264 VAC), 65W AC/DC adapter for network infrastructure equipment.

IC Role / Device Role / Timing Role: Output rectifier in discontinuous conduction mode (DCM) flyback topology.

Use Value: 120 A surge rating absorbs line-induced transients; 150°C T_J max ensures reliability under sustained 50°C ambient + self-heating.

Automotive Body Control Module

Programmable Logic Controller (PLC) Power Supply

Use Scenario: Reverse polarity protection and load dump clamping in 12V auxiliary power rails of BCMs.

IC Role / Device Role / Timing Role: Unidirectional current valve preventing battery reversal damage and absorbing ISO 7637-2 pulse 5a energy.

Use Value: Guard ring design sustains >100 V transient spikes; 50 V V_RRM provides margin above nominal 14 V system voltage.

Use Scenario: Input rectification in 24V DC-powered PLC I/O module with wide-temperature operation (-40°C to +70°C ambient).

IC Role / Device Role / Timing Role: Primary AC input rectifier feeding bulk capacitor in unregulated linear or buck-derived supply.

Use Value: -55°C to +150°C T_J range ensures startup at cold ambient and stability under full-load enclosure heating.

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	40 V V_RRM, 0.52 V V_F @ 5A, DO-201AD, same I_F/I_FSM	Limited to ≤40 V systems; unsuitable where 50 V margin is required for transient tolerance	Select only if system peak reverse voltage stays below 40 V and lowest possible VF is critical
ON Semiconductor SB550	50 V V_RRM, 0.72 V V_F @ 5A, DO-201AD, 100 A I_FSM, no AEC-Q101 option	Lower surge rating; lacks guard ring per datasheet; slightly higher VF increases conduction loss	Acceptable for cost-sensitive non-automotive applications where 120 A surge headroom is not required

Compared with VS-50SQ040 and SB550, SR505 R0G uniquely balances 50 V blocking, 0.70 V VF, 120 A surge, and guard ring protection-making it optimal for industrial and automotive-adjacent 24V/48V power stages requiring robustness and efficiency.

Availability

SR505 R0G is available at Aetrix Electronics and suitable for industrial DC/DC converters, telecom power adapters, and programmable logic controller (PLC) power supplies requiring stable component supply and long-term manufacturability.

Supply support for SR505 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, serving industrial, computing, and consumer markets since 1979.

The SR502–SR520 series targets high-reliability power conversion applications, emphasizing low VF, high surge tolerance, and extended temperature operation in space-constrained axial-leaded packages.

FAQ

What is the maximum junction temperature rating for SR505 R0G?

The SR505 R0G has a maximum junction temperature (T_J) rating of +150°C, verified per its absolute maximum ratings table. This allows reliable operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive auxiliary modules when properly heatsinked. The SR505 R0G maintains specified electrical parameters up to this limit.

Does SR505 R0G meet AEC-Q101 reliability standards?

No, SR505 R0G does not meet AEC-Q101. The "R0G" suffix denotes standard commercial/industrial grade; AEC-Q101 qualified versions use the "H" suffix (e.g., SR505H). While SR505 R0G shares the same die and DO-201AD package, only SR505H undergoes the full stress test sequence defined in AEC-Q101 Rev D. SR505 R0G remains suitable for non-automotive applications requiring high surge and thermal robustness.

What is the forward voltage drop of SR505 R0G at 5 A and 100°C junction temperature?

The SR505 R0G datasheet specifies V_F ≤ 0.70 V at 5 A and 25°C. At 100°C, V_F decreases due to Schottky's negative temperature coefficient; typical curves show ~0.62–0.65 V. No maximum value is published at 100°C, but design margins should assume ≤0.70 V for worst-case conduction loss calculation. The SR505 R0G maintains stable performance across its full -55°C to +150°C T_J range.

Is SR505 R0G compatible with lead-free reflow soldering processes?

Yes, SR505 R0G features pure tin-plated leads compliant with J-STD-002 for solderability, and its DO-201AD package is rated for lead-free reflow profiles (peak ≤260°C, 10 s max). The molding compound meets UL 94V-0 and is halogen-free per IEC 61249-2-21. SR505 R0G has been validated for standard IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) 1 handling.

How does the guard ring in SR505 R0G improve reliability?

The guard ring in SR505 R0G is a diffusion-based edge termination structure that distributes electric field stress away from the active junction periphery. This prevents premature avalanche breakdown during voltage transients (e.g., ISO 7637-2 pulses), increasing ruggedness without external components. Unlike planar-edge devices, SR505 R0G sustains rated V_RRM under fast dv/dt conditions up to 10,000 V/µs-critical in high-frequency SMPS and motor drive applications.

SR505 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):: 50 V

Current - Average Rectified (Io):: 5A

Voltage - Forward (Vf) (Max) @ If:: 700 mV @ 5 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 50 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SR505 R0G FAQ

1.How can I place an order for SR505 R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SR505 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 SR505 R0G reliable?

The price and inventory of SR505 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR505 R0G is usually 5 days.

3.What payment methods are accepted for SR505 R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR505 R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR505 R0G?

SR505 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR505 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 SR505 R0G?

For technical support, including SR505 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR505 R0G requirements.

6.How does Aetrix verify that SR505 R0G is sourced from the original manufacturer or authorized distributors?

All SR505 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 SR505 R0G meets industry standards.

7.What is the process for return or replacement of SR505 R0G?

All SR505 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR505 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 SR505 R0G part is unused and in its original packaging.

Return procedure for SR505 R0G:

1.Submit a request within 90 days.

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

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