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

Diodes Incorporated UF2003-T

Name: UF2003-T
Brand: Diodes Incorporated
SKU: UF2003-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UF2003-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: UF2003-T.pdf

Description:: DIODE GEN PURP 200V 2A DO15

Quantity:: RFQ Add To RFQ list

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Inventory:8,113

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Product details

Overview

UF2003-T from Diodes Incorporated is a 2.0A ultra-fast rectifier diode in DO-15 package, rated for 200V peak repetitive reverse voltage (V_RRM), with 1.7V forward voltage at 2.0A, 50ns reverse recovery time (t_rr), and 5.0µA reverse leakage at 25°C - used in high-frequency AC/DC converters and switch-mode power supplies.

For engineers reviewing the UF2003-T datasheet, UF2003-T pinout, UF2003-T application, or UF2003-T equivalent, key selection criteria include V_RRM, t_rr, V_F, I_O, and thermal resistance to ensure reliable operation in high-efficiency SMPS, DC-DC flyback stages, and automotive auxiliary power modules.

Technical Context

This ultra-fast rectifier employs a diffused junction structure optimized for low switching losses and minimal reverse recovery charge (Q_rr). Its 50ns t_rr enables efficient operation up to several hundred kHz in discontinuous conduction mode (DCM) topologies.

Rated for 2.0A average forward current at T_A = +50°C with 50°C/W junction-to-ambient thermal resistance, it supports compact board layouts when leads are maintained at ambient temperature at 9.5mm from case - critical for thermally constrained industrial adapters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum non-repetitive reverse voltage before breakdown; defines safe operating range in 120VAC-derived DC bus applications.
I_O	2.0 A - Average forward current capability at T_A = +50°C; sets continuous power handling in 24W–30W SMPS designs.
V_F @ 2.0A	1.7 V - Forward voltage drop at rated current; determines conduction loss (3.4W max) and thermal load in rectification stage.
t_rr	50 ns - Reverse recovery time measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables stable operation in 200–500kHz flyback converters.
I_RM @ 25°C	5.0 µA - Reverse leakage at rated V_R; ensures low standby power loss in energy-efficient adapters meeting Level VI standards.
R_θJA	50 °C/W - Junction-to-ambient thermal resistance; requires ≥100 mm² copper pour for ≤100°C junction rise at full load.
I_FSM	60 A - Non-repetitive surge rating (8.3ms half-sine); withstands inrush currents during cold-start of offline power supplies.

Pinout & Package

Package: DO-15 molded plastic case (UL 94V-0), cathode indicated by band, tin-plated terminals, 0.4g weight. Lead spacing: 5.5–7.62mm (B), body length: 25.4mm (A).

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC input or transformer secondary; must handle 2.0A continuous and 60A surge without bond wire failure.
Cathode	Forward current exit / reverse blocking node	Connected to output capacitor or switching node; polarity band identifies this terminal for correct PCB placement.

Key Features

Feature	Design Value
Ultra-fast switching	50ns t_rr reduces switching loss and EMI generation in high-frequency SMPS compared to standard rectifiers (e.g., 1N4007: >2µs).
Diffused junction	Enables controlled carrier lifetime for predictable reverse recovery behavior and stable Q_rr across temperature.
60A surge rating	Supports robust cold-start performance in universal-input AC/DC adapters without external inrush limiting.
Low IR (5.0µA)	Minimizes no-load power consumption in standby mode - critical for meeting DOE Level VI and EU CoC Tier 2 efficiency requirements.

Applications

AC/DC Adapter Rectification

DC-DC Flyback Output Stage

Use Scenario: 12V/2A universal-input wall adapter for IoT gateways.

IC Role / Device Role / Timing Role: Primary-side ultra-fast rectifier converting transformer secondary AC to regulated DC output.

Use Value: 50ns t_rr prevents cross-conduction loss with synchronous MOSFETs and maintains >85% efficiency at 230VAC/50Hz input.

Use Scenario: Isolated 5V/1.5A auxiliary supply in industrial PLC power module.

IC Role / Device Role / Timing Role: Secondary-side freewheeling rectifier in discontinuous conduction mode (DCM) flyback converter.

Use Value: 1.7V V_F limits conduction loss to <3.5W, enabling natural convection cooling without heatsink.

Automotive Auxiliary Power

LED Driver Input Stage

Use Scenario: 12V-to-5V buck-boost pre-regulator in vehicle infotainment USB port.

IC Role / Device Role / Timing Role: Input rectifier handling 12–24V battery-supplied AC ripple from alternator-fed transformer.

Use Value: 60A I_FSM withstands load-dump transients up to ISO 7637-2 Pulse 5a without degradation.

Use Scenario: Constant-current LED driver for commercial signage with dimmable AC input.

IC Role / Device Role / Timing Role: Bridge rectifier input stage feeding bulk capacitor in quasi-resonant topology.

Use Value: Low 5.0µA I_RM at 100°C ensures <100µW leakage in high-ambient outdoor enclosures, preserving dimming linearity.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R02	V_RRM = 200V, t_rr = 35ns, V_F = 1.15V @ 2A - faster but lower V_F.	Better for >500kHz resonant converters; higher cost and tighter layout tolerance due to lower Q_rr.	Select when minimizing EMI and improving light-load efficiency outweighs cost sensitivity.
ES2D	V_RRM = 200V, t_rr = 35ns, V_F = 1.15V @ 2A, DO-214AA package - surface-mount alternative.	Requires rework of through-hole footprint; better thermal performance on 2-layer boards with thermal pads.	Choose for automated assembly and improved thermal management where board space permits SMT conversion.

Compared with STTH2R02 and ES2D, UF2003-T offers lower cost and proven reliability in legacy through-hole designs, while trading 15ns in t_rr and ~0.55V in V_F for broader manufacturing compatibility and simpler thermal design.

Availability

UF2003-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial DC-DC converters, and automotive auxiliary power supplies requiring stable component supply despite its obsolete status.

Supply support for UF2003-T 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The UF200x series belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-frequency switching power supplies where low t_rr and controlled Q_rr are essential to minimize loss and EMI.

FAQ

Is UF2003-T still in production?

No - UF2003-T is officially obsolete per Diodes' DS25007 Rev. 5-4 (May 2023). Aetrix Electronics maintains limited legacy stock and supports last-time buys with full traceability and documentation for ongoing production programs.

What is the maximum operating temperature for UF2003-T?

The junction and storage temperature range is –65°C to +150°C. At 2.0A average forward current, derating begins at +50°C ambient; with R_θJA = 50°C/W, maximum allowable power dissipation drops to 1.0W above +50°C ambient.

Can UF2003-T replace UF2002-T in a design?

Yes - UF2003-T (200V V_RRM) can directly replace UF2002-T (100V V_RRM) if the circuit's peak reverse voltage does not exceed 200V. No changes to layout or thermal design are needed, though forward voltage increases slightly (1.3V → 1.7V).

Does UF2003-T meet AEC-Q101 for automotive use?

No - UF2003-T is not AEC-Q101 qualified. Diodes states that automotive-grade versions require specific change control and PPAP capability; users needing automotive qualification should contact Diodes directly for approved alternatives such as the B120AF series.

UF2003-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-204AC, DO-15, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Technology:: Standard

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

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 1 V @ 2 A

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

Reverse Recovery Time (trr):: 50 ns

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

Capacitance @ Vr, F:: 50pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-15

Operating Temperature - Junction:: -65°C ~ 150°C

UF2003-T FAQ

1.How can I place an order for UF2003-T through Aetrix?

Please submit a Request for Quotation (RFQ) for UF2003-T 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 UF2003-T reliable?

The price and inventory of UF2003-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF2003-T is usually 5 days.

3.What payment methods are accepted for UF2003-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF2003-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UF2003-T?

UF2003-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UF2003-T 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 UF2003-T?

For technical support, including UF2003-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF2003-T requirements.

6.How does Aetrix verify that UF2003-T is sourced from the original manufacturer or authorized distributors?

All UF2003-T 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 UF2003-T meets industry standards.

7.What is the process for return or replacement of UF2003-T?

All UF2003-T units undergo pre-shipment inspection (PSI). If there is an issue with UF2003-T, 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 UF2003-T part is unused and in its original packaging.

Return procedure for UF2003-T:

1.Submit a request within 90 days.

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

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