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

Taiwan Semiconductor Corporation UF4003 R0G

Name: UF4003 R0G
Brand: Taiwan Semiconductor Corporation
SKU: UF4003 R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UF4003 R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: UF4003 R0G.pdf

Description:: DIODE GEN PURP 200V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:2,534

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Product details

Overview

UF4003 R0G from Taiwan Semiconductor is a 1A, 200V ultrafast recovery rectifier diode in DO-204AL (DO-41) package, featuring 50 ns reverse recovery time, 1.0 V forward voltage at 1 A, and 30 A surge current capability; used in switching-mode power supplies and freewheeling paths.

For engineers reviewing the UF4003 R0G datasheet, UF4003 R0G pinout, UF4003 R0G application, or UF4003 R0G equivalent, key selection criteria include V_RRM = 200 V, t_rr = 50 ns, I_F = 1 A, thermal resistance R_θJL = 15 °C/W, and AEC-Q101 qualification availability.

Technical Context

This single-die silicon rectifier uses glass-passivated junction technology to sustain 150 °C maximum junction temperature and deliver stable performance under high-frequency switching conditions. Its ultrafast recovery enables efficient operation in DC–DC converters operating above 50 kHz.

The device exhibits low forward voltage drop (1.0 V @ 1 A, 25 °C) and minimal junction capacitance (17 pF @ 4 V), supporting reduced conduction loss and fast turn-off behavior critical for high-efficiency SMPS topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking range in flyback/freewheeling circuits
t_rr	50 ns - Ultrafast reverse recovery time; minimizes switching loss and EMI in >50 kHz converters
V_F	1.0 V @ 1 A, 25 °C - Low forward voltage reduces conduction loss and thermal stress at rated current
I_FSM	30 A - Peak non-repetitive surge current handling; supports inrush and transient overload tolerance
R_θJL	15 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pour heat sinking without heatsink
I_R	5 µA @ 200 V, 25 °C - Low leakage ensures minimal standby power loss in offline power stages

Pinout & Package

Package: DO-204AL (DO-41), axial leaded, glass-passivated silicon die, cathode indicated by band. Weight: 0.330 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path
Cathode	Forward current exit / reverse blocking terminal	Marked with band; connects to higher-potential rail (e.g., output capacitor positive or inductor output)

Key Features

Feature	Design Value
Glass-passivated junction	Enables reliable operation at T_J = 150 °C and improves moisture resistance vs. epoxy-only passivation
AEC-Q101 qualified option available	Supports automotive-grade reliability requirements including temperature cycling, HTRB, and ESD testing
Ultrafast 50 ns recovery	Reduces switching losses and diode-induced ringing in high-frequency synchronous rectification designs
RoHS & halogen-free compliant	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications

Applications

DC–DC Converter	Switching Inverter
Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs. IC Role / Device Role / Timing Role: Ultrafast rectifier conducting during transformer reset phase; blocks reverse voltage during primary switch on-time. Use Value: 50 ns t_rr and 1.0 V V_F jointly reduce total power loss by ≥12% vs. standard FR107 in 100 kHz designs.	Use Scenario: Freewheeling path in half-bridge motor drive inverters for HVAC blowers and power tools. IC Role / Device Role / Timing Role: Clamps inductive kickback during MOSFET off-state; conducts reverse recovery current within defined t_rr. Use Value: 30 A I_FSM withstands motor startup surges; 15 °C/W R_θJL allows direct lead soldering to thermal pads without derating.
AC–DC Adapter	Industrial Power Supply
Use Scenario: Output rectification in compact 12 V/2 A wall adapters with <15 mm height constraint. IC Role / Device Role / Timing Role: Single-diode output stage replacing dual Schottky in cost-sensitive designs; operates at 60–132 kHz. Use Value: DO-41 package fits tight layouts; 5 µA I_R at 200 V ensures <10 mW no-load loss in energy-efficient adapters.	Use Scenario: Input bridge leg or auxiliary bias supply rectification in 24 V/10 A industrial PSUs. IC Role / Device Role / Timing Role: High-reliability rectifier in continuous conduction mode (CCM) PFC front-end or hold-up capacitor charging path. Use Value: 150 °C T_JMAX and JESD201 Class 2 whisker resistance support 10+ year field life in unventilated enclosures.

DC–DC Converter

Switching Inverter

Use Scenario: Secondary-side rectification in isolated flyback or forward converters delivering 5–24 V outputs.

IC Role / Device Role / Timing Role: Ultrafast rectifier conducting during transformer reset phase; blocks reverse voltage during primary switch on-time.

Use Value: 50 ns t_rr and 1.0 V V_F jointly reduce total power loss by ≥12% vs. standard FR107 in 100 kHz designs.

Use Scenario: Freewheeling path in half-bridge motor drive inverters for HVAC blowers and power tools.

IC Role / Device Role / Timing Role: Clamps inductive kickback during MOSFET off-state; conducts reverse recovery current within defined t_rr.

Use Value: 30 A I_FSM withstands motor startup surges; 15 °C/W R_θJL allows direct lead soldering to thermal pads without derating.

AC–DC Adapter

Industrial Power Supply

Use Scenario: Output rectification in compact 12 V/2 A wall adapters with <15 mm height constraint.

IC Role / Device Role / Timing Role: Single-diode output stage replacing dual Schottky in cost-sensitive designs; operates at 60–132 kHz.

Use Value: DO-41 package fits tight layouts; 5 µA I_R at 200 V ensures <10 mW no-load loss in energy-efficient adapters.

Use Scenario: Input bridge leg or auxiliary bias supply rectification in 24 V/10 A industrial PSUs.

IC Role / Device Role / Timing Role: High-reliability rectifier in continuous conduction mode (CCM) PFC front-end or hold-up capacitor charging path.

Use Value: 150 °C T_JMAX and JESD201 Class 2 whisker resistance support 10+ year field life in unventilated enclosures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R02	V_RRM = 200 V, t_rr = 35 ns, V_F = 1.15 V @ 1 A; TO-220AC package, higher thermal mass	Requires PCB footprint change and heatsink mounting; better for >5 A average current	Select when higher surge robustness and board-level thermal management are prioritized over size/cost
ON Semi MUR120	V_RRM = 200 V, t_rr = 75 ns, V_F = 0.92 V @ 1 A; same DO-41 package, slightly lower V_F	Higher leakage (10 µA @ 200 V) and slower recovery increase EMI in >100 kHz designs	Select for cost-sensitive 50–80 kHz applications where lowest V_F outweighs t_rr sensitivity

Compared with STTH1R02 and MUR120, UF4003 R0G delivers optimal balance of speed (50 ns), forward loss (1.0 V), and DO-41 form factor-making it preferred for space-constrained, medium-frequency SMPS where thermal design relies on lead conduction rather than case dissipation.

Availability

UF4003 R0G is available at Aetrix Electronics and suitable for DC–DC converters, switching inverters, and industrial power supplies requiring stable component supply, long-term lifecycle assurance, and AEC-Q101-qualified variants.

Supply support for UF4003 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 industrial, computing, and consumer markets since 1979.

The UF400x series targets high-efficiency power conversion systems demanding ultrafast recovery, low forward voltage, and rugged thermal performance in compact axial packages.

FAQ

What is the maximum junction temperature rating for UF4003 R0G?

The UF4003 R0G has a maximum junction temperature (T_J) of +150 °C, verified per absolute maximum ratings in the official Taiwan Semiconductor datasheet P2104. This rating enables reliable operation in enclosed industrial power supplies and automotive auxiliary modules where ambient temperatures exceed 85 °C. Derating curves confirm usable current capacity down to 0.6 A at 125 °C ambient with standard PCB copper.

Does UF4003 R0G have AEC-Q101 qualification?

UF4003 R0G itself is not AEC-Q101 qualified; however, the UF4003H variant (same electrical specs, marked "H") meets AEC-Q101 stress test requirements. The R0G suffix indicates green compound and tape-and-reel packaging-not qualification status. For automotive applications, specify UF4003H or verify qualification status via Taiwan Semiconductor's official part number cross-reference tool.

What is the reverse recovery time (t_rr) of UF4003 R0G and how is it measured?

The UF4003 R0G has a typical reverse recovery time (t_rr) of 50 ns, measured under conditions: I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, per the Taiwan Semiconductor P2104 datasheet. This value applies specifically to UF4001–UF4004 variants and is confirmed using standardized double-pulse test circuitry shown in Figure 6 of the datasheet.

Can UF4003 R0G replace UF4007 in a 600 V circuit?

No, UF4003 R0G cannot replace UF4007 in a 600 V circuit. UF4003 R0G has V_RRM = 200 V, while UF4007 specifies V_RRM = 1000 V. Operating UF4003 R0G at 600 V exceeds its absolute maximum rating and risks catastrophic avalanche failure. Always match V_RRM to peak reverse voltage in the application, with ≥20% margin.

What does the "R0G" suffix mean in UF4003 R0G?

The "R0G" suffix in UF4003 R0G denotes green molding compound (RoHS/halogen-free) and tape-and-reel packaging (5,000 pcs/reel), per Taiwan Semiconductor's ordering code table in datasheet P2104. It does not indicate AEC-Q101 qualification (that requires "H"), temperature grade, or special screening-only environmental compliance and packaging format.

UF4003 R0G Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 1 A

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

Reverse Recovery Time (trr):: 50 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 200 V

Capacitance @ Vr, F:: 17pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

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

UF4003 R0G FAQ

1.How can I place an order for UF4003 R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for UF4003 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 UF4003 R0G reliable?

The price and inventory of UF4003 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF4003 R0G is usually 5 days.

3.What payment methods are accepted for UF4003 R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF4003 R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UF4003 R0G?

UF4003 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UF4003 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 UF4003 R0G?

For technical support, including UF4003 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF4003 R0G requirements.

6.How does Aetrix verify that UF4003 R0G is sourced from the original manufacturer or authorized distributors?

All UF4003 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 UF4003 R0G meets industry standards.

7.What is the process for return or replacement of UF4003 R0G?

All UF4003 R0G units undergo pre-shipment inspection (PSI). If there is an issue with UF4003 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 UF4003 R0G part is unused and in its original packaging.

Return procedure for UF4003 R0G:

1.Submit a request within 90 days.

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

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