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

Taiwan Semiconductor Corporation SR803 R0G

Name: SR803 R0G
Brand: Taiwan Semiconductor Corporation
SKU: SR803 R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SR803 R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-201AD, Axial

Datasheet:: SR803 R0G.pdf

Description:: DIODE SCHOTTKY 30V 8A DO201AD

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Product details

Overview

SR803 R0G from Taiwan Semiconductor is an AEC-Q101-qualified 8A, 30V Schottky barrier rectifier in DO-201AD package, featuring 0.55V forward voltage at 8A/25°C, 150A surge capability, and guard ring overvoltage protection - deployed in automotive-grade DC-DC converters and industrial SMPS.

For engineers reviewing the SR803 R0G datasheet, SR803 R0G pinout, SR803 R0G application, or SR803 R0G equivalent, key selection criteria include V_RRM = 30 V, I_F = 8 A, T_J max = 125 °C (standard) / 150 °C (AEC-Q101), low VF for thermal efficiency, and DO-201AD mechanical compatibility with high-surge power rails.

Technical Context

This single-die Schottky rectifier uses a planar junction structure with integrated guard ring to sustain repetitive reverse voltages up to 30 V while maintaining low conduction loss. Its 150 A non-repetitive surge rating supports transient load conditions in switching power supplies without thermal runaway.

The device operates across –55 °C to +125 °C (standard) or +150 °C (AEC-Q101 grade), with R_θJA = 40 °C/W enabling compact heatsink-free designs up to ~2 W dissipation at ambient. Reverse leakage remains ≤500 µA at 25 °C and ≤15 mA at 100 °C under rated V_R.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	30 V - Maximum repetitive reverse blocking voltage; defines safe operating range in 24 V system rails.
I_F	8 A - Continuous average forward current; supports 100 W+ output in 12–24 V DC-DC stages.
V_F @ 8A, 25°C	0.55 V - Low conduction loss reduces power dissipation by ~4.4 W vs. higher-VF alternatives.
I_FSM	150 A - Peak surge current handling for 8.3 ms half-sine; withstands cold-start inrush in adapters.
T_J max	125 °C (standard) / 150 °C (AEC-Q101) - Enables operation in under-hood automotive environments.
R_θJA	40 °C/W - Junction-to-ambient thermal resistance; allows ~2 W continuous dissipation at 70 °C ambient.
I_R @ V_R, 25°C	≤500 µA - Low reverse leakage preserves efficiency in high-impedance bias networks.

Pinout & Package

DO-201AD axial-leaded package with cathode band marking; leads are pure tin-plated, solderable per J-STD-002, and pass JESD201 Class 2 whisker test. Weight: 1.10 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (lead without band)	Forward current entry	Connected to input/source side of rectification path; handles full 8 A DC and 150 A surge.
Cathode (lead with band)	Forward current exit / reverse blocking terminal	Connected to output/load side; blocks up to 30 V reverse voltage with ≤500 µA leakage at 25 °C.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive under-hood use with extended temperature and reliability testing.
Guard ring structure	Prevents edge breakdown at high dv/dt (10,000 V/µs), improving ruggedness in fast-switching SMPS.
Low VF (0.55 V @ 8A)	Reduces conduction loss by >30% vs. comparable 40–60 V Schottkys, lowering thermal design burden.
RoHS & halogen-free	Complies with IEC 61249-2-21; enables use in environmentally regulated industrial and automotive assemblies.
DO-201AD mechanical robustness	UL 94V-0 molding compound and 1.10 g mass support vibration-resistant mounting in transport electronics.

Applications

Automotive DC-DC Converters	Industrial SMPS Front-End
Use Scenario: 12 V to 5 V/3.3 V point-of-load conversion in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Primary output rectifier in synchronous or quasi-resonant flyback topologies. Use Value: 0.55 V V_F minimizes heat generation in confined ECU enclosures; AEC-Q101 rating ensures 15-year field reliability.	Use Scenario: Output rectification in 24 V input, 48 V output telecom PSUs with high-efficiency requirements. IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in phase-shifted full-bridge converters. Use Value: 150 A I_FSM sustains repeated startup surges; 40 °C/W R_θJA enables natural-convection cooling.
Consumer Adapters	LED Driver Power Stages
Use Scenario: Compact wall adapters delivering 5–20 W at USB-C PD-compatible voltages. IC Role / Device Role / Timing Role: Output rectifier in high-frequency flyback converters operating at 65–130 kHz. Use Value: Low V_F and 30 V V_RRM match typical 5–12 V output specs while reducing heatsink size and cost.	Use Scenario: Constant-current LED string drivers for commercial lighting with 24–48 V bus inputs. IC Role / Device Role / Timing Role: Freewheeling path in buck-derived constant-current regulators. Use Value: Guard ring prevents failure during LED open-circuit transients; ≤500 µA I_R avoids standby power penalty.

Automotive DC-DC Converters

Industrial SMPS Front-End

Use Scenario: 12 V to 5 V/3.3 V point-of-load conversion in engine control units and ADAS domain controllers.

IC Role / Device Role / Timing Role: Primary output rectifier in synchronous or quasi-resonant flyback topologies.

Use Value: 0.55 V V_F minimizes heat generation in confined ECU enclosures; AEC-Q101 rating ensures 15-year field reliability.

Use Scenario: Output rectification in 24 V input, 48 V output telecom PSUs with high-efficiency requirements.

IC Role / Device Role / Timing Role: Secondary-side freewheeling diode in phase-shifted full-bridge converters.

Use Value: 150 A I_FSM sustains repeated startup surges; 40 °C/W R_θJA enables natural-convection cooling.

Consumer Adapters

LED Driver Power Stages

Use Scenario: Compact wall adapters delivering 5–20 W at USB-C PD-compatible voltages.

IC Role / Device Role / Timing Role: Output rectifier in high-frequency flyback converters operating at 65–130 kHz.

Use Value: Low V_F and 30 V V_RRM match typical 5–12 V output specs while reducing heatsink size and cost.

Use Scenario: Constant-current LED string drivers for commercial lighting with 24–48 V bus inputs.

IC Role / Device Role / Timing Role: Freewheeling path in buck-derived constant-current regulators.

Use Value: Guard ring prevents failure during LED open-circuit transients; ≤500 µA I_R avoids standby power penalty.

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-8EWH03-M3/45	Same DO-201AD package, 8 A / 30 V, V_F = 0.54 V @ 8 A, but not AEC-Q101 qualified.	Suitable for industrial/commercial SMPS where automotive qualification is not required.	Choose when cost sensitivity outweighs AEC-Q101 need and thermal margin permits slightly higher leakage (1 mA max).
ON Semiconductor SB830-E3/45	DO-201AD, 8 A / 30 V, V_F = 0.57 V @ 8 A, AEC-Q101 qualified, but I_FSM = 120 A (vs. 150 A).	Better fit for space-constrained automotive modules needing qualification but lower surge demand.	Select when footprint compatibility and AEC-Q101 are mandatory, and peak surge stays below 120 A.

Compared with VS-8EWH03-M3/45 and SB830-E3/45, SR803 R0G uniquely combines AEC-Q101 qualification, 150 A surge rating, and 0.55 V V_F - making it optimal for thermally constrained, high-reliability automotive DC-DC stages where both ruggedness and efficiency are critical.

Availability

SR803 R0G is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial SMPS front-end designs, and consumer adapter power stages requiring stable component supply and long-term lifecycle assurance.

Supply support for SR803 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 global automotive, industrial, and consumer markets since 1979.

The SR802–SR820 series was designed specifically for high-efficiency, high-reliability rectification in automotive-grade and industrial switching power supplies - emphasizing low VF, surge robustness, and AEC-Q101 compliance.

FAQ

What is the maximum junction temperature rating for SR803 R0G?

The SR803 R0G has a standard maximum junction temperature of +125 °C. When ordered with the "H" suffix (e.g., SR803H R0G), it is AEC-Q101 qualified and rated for +150 °C operation. The SR803 R0G variant itself is specified for –55 °C to +125 °C junction range per the J2105 datasheet revision.

Is SR803 R0G pin-compatible with other devices in the SR802–SR820 family?

Yes, all SR802–SR820 devices share identical DO-201AD packaging, anode/cathode pinout, and mechanical dimensions. The SR803 R0G uses the same axial-leaded configuration with cathode band marking as SR802, SR804, and SR820 - enabling direct board-level substitution within voltage-rated limits.

What does the "R0G" suffix indicate in SR803 R0G?

The "R0G" suffix denotes RoHS-compliant, halogen-free construction per IEC 61249-2-21, with green molding compound. It corresponds to the standard-grade (non-AEC-Q101) version in tape-and-reel packaging (1,250 pcs/reel). The "H" suffix (e.g., SR803H R0G) adds AEC-Q101 qualification.

How does SR803 R0G perform at elevated temperatures?

At 100 °C junction temperature, SR803 R0G maintains ≤15 mA reverse leakage under rated 30 V reverse bias. Its forward voltage increases to ~0.48 V at 8 A, preserving conduction efficiency. Derating curves confirm usable 8 A average current up to ~95 °C ambient with minimal heatsinking.

Can SR803 R0G replace a 40 V Schottky rectifier like SR804 in a 24 V system?

No - SR803 R0G is rated for 30 V V_RRM, while SR804 is rated for 40 V. In a 24 V system with potential transients exceeding 30 V (e.g., load dump), SR803 R0G may experience avalanche breakdown. SR803 R0G is appropriate only where worst-case reverse voltage remains ≤30 V, such as tightly regulated 12 V or 24 V outputs with clamping.

SR803 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):: 30 V

Current - Average Rectified (Io):: 8A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 8 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 500 µA @ 30 V

Capacitance @ Vr, F:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-201AD

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

SR803 R0G FAQ

1.How can I place an order for SR803 R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for SR803 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 SR803 R0G reliable?

The price and inventory of SR803 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR803 R0G is usually 5 days.

3.What payment methods are accepted for SR803 R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR803 R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SR803 R0G?

SR803 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SR803 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 SR803 R0G?

For technical support, including SR803 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR803 R0G requirements.

6.How does Aetrix verify that SR803 R0G is sourced from the original manufacturer or authorized distributors?

All SR803 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 SR803 R0G meets industry standards.

7.What is the process for return or replacement of SR803 R0G?

All SR803 R0G units undergo pre-shipment inspection (PSI). If there is an issue with SR803 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 SR803 R0G part is unused and in its original packaging.

Return procedure for SR803 R0G:

1.Submit a request within 90 days.

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

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