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

Taiwan Semiconductor Corporation UF4002HR0G

Name: UF4002HR0G
Brand: Taiwan Semiconductor Corporation
SKU: UF4002HR0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UF4002HR0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: UF4002HR0G.pdf

Description:: DIODE GEN PURP 100V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:3,162

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Product details

Overview

UF4002HR0G from Taiwan Semiconductor is a 1A, 100V 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. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the UF4002HR0G datasheet, UF4002HR0G pinout, UF4002HR0G application, or UF4002HR0G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), ultrafast trr (≤50 ns), thermal resistance (R_θJL = 15 °C/W), AEC-Q101 qualification status, and DO-41 mechanical compatibility.

Technical Context

This device is a single-die, glass-passivated silicon junction rectifier optimized for high-efficiency DC–DC conversion. Its ultrafast recovery (trr ≤ 50 ns) and low forward voltage (VF = 1.0 V @ 1 A, 25°C) reduce switching losses and conduction losses simultaneously in high-frequency topologies.

The UF4002HR0G operates across –55°C to +150°C junction temperature range and delivers stable performance under transient surge conditions (IFSM = 30 A, 8.3 ms half-sine). Its R_θJA = 60 °C/W and R_θJL = 15 °C/W support reliable thermal management in compact layouts without forced cooling.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or boost output stages
I_F	1 A continuous - Rated average forward current; supports sustained conduction in 12–24 V DC–DC outputs
t_rr	≤50 ns - Ultrafast recovery enables >100 kHz switching without excessive reverse recovery loss
V_F	1.0 V @ 1 A, 25°C - Low conduction drop improves efficiency and reduces heat generation at full load
I_FSM	30 A @ 8.3 ms - Withstands inrush and transient surges common during startup or fault conditions
R_θJL	15 °C/W - Enables direct PCB copper pour heatsinking; simplifies thermal design vs. higher-R_θ alternatives

Pinout & Package

DO-204AL (DO-41) package with axial leads: cathode indicated by band; lead finish is pure tin, solderable per J-STD-002; weight ≈ 0.330 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck, transformer secondary in flyback)
Cathode	Forward current exit / reverse blocking terminal	Marked with band; ties to output rail or filter capacitor positive; blocks reverse voltage up to 100 V

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness
Glass passivated junction	Enhances moisture resistance and long-term stability under humid or high-bias stress conditions
Ultrafast recovery (≤50 ns)	Minimizes reverse recovery charge (Q_rr) and associated switching loss in high-frequency converters
RoHS & halogen-free	Complies with IEC 61249-2-21; suitable for environmentally regulated industrial and automotive production

Applications

DC–DC Converter Output Rectification	Switch-Mode Power Supply Freewheeling
Use Scenario: Used as secondary-side rectifier in isolated 12 V/1 A buck-derived DC–DC module operating at 250 kHz. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; timing-critical due to trr impact on switching node ringing. Use Value: 50 ns t_rr and 1.0 V V_F jointly reduce total power loss by ~18% versus standard FR107 in identical layout.	Use Scenario: Placed across inductive load (e.g., solenoid driver) in 24 V industrial control system. IC Role / Device Role / Timing Role: Freewheeling path for stored inductor energy; must clamp voltage spike within 100 V rating before MOSFET breakdown. Use Value: 30 A I_FSM safely absorbs 20 ms inductive kickback pulses without degradation; DO-41 form factor fits legacy through-hole footprints.
Automotive LED Driver Output Stage	AC–DC Adapter Secondary Rectification
Use Scenario: Output rectifier in constant-current LED driver for exterior lighting (IP67, -40°C to +125°C ambient). IC Role / Device Role / Timing Role: High-reliability rectifier sustaining continuous 1 A forward current while exposed to thermal cycling and vibration. Use Value: AEC-Q101 qualification and –55°C to +150°C T_J range ensure operation over full automotive temperature envelope without derating.	Use Scenario: Secondary-side rectifier in universal-input 5 V/2 A wall adapter using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: Converts high-frequency transformer output to low-voltage DC; operates at 65–130 kHz with minimal EMI contribution. Use Value: Low C_J (17 pF) and fast t_rr suppress high-frequency ringing, easing EMI filter design and reducing conducted emissions.

DC–DC Converter Output Rectification

Switch-Mode Power Supply Freewheeling

Use Scenario: Used as secondary-side rectifier in isolated 12 V/1 A buck-derived DC–DC module operating at 250 kHz.

IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; timing-critical due to trr impact on switching node ringing.

Use Value: 50 ns t_rr and 1.0 V V_F jointly reduce total power loss by ~18% versus standard FR107 in identical layout.

Use Scenario: Placed across inductive load (e.g., solenoid driver) in 24 V industrial control system.

IC Role / Device Role / Timing Role: Freewheeling path for stored inductor energy; must clamp voltage spike within 100 V rating before MOSFET breakdown.

Use Value: 30 A I_FSM safely absorbs 20 ms inductive kickback pulses without degradation; DO-41 form factor fits legacy through-hole footprints.

Automotive LED Driver Output Stage

AC–DC Adapter Secondary Rectification

Use Scenario: Output rectifier in constant-current LED driver for exterior lighting (IP67, -40°C to +125°C ambient).

IC Role / Device Role / Timing Role: High-reliability rectifier sustaining continuous 1 A forward current while exposed to thermal cycling and vibration.

Use Value: AEC-Q101 qualification and –55°C to +150°C T_J range ensure operation over full automotive temperature envelope without derating.

Use Scenario: Secondary-side rectifier in universal-input 5 V/2 A wall adapter using quasi-resonant flyback topology.

IC Role / Device Role / Timing Role: Converts high-frequency transformer output to low-voltage DC; operates at 65–130 kHz with minimal EMI contribution.

Use Value: Low C_J (17 pF) and fast t_rr suppress high-frequency ringing, easing EMI filter design and reducing conducted emissions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	V_RRM = 400 V, t_rr = 35 ns, V_F = 1.15 V @ 1 A; TO-220AC package	Higher voltage rating but larger footprint; requires heatsink above ~0.5 A continuous	Select when >100 V blocking or higher surge margin is required; not drop-in for DO-41 board space
ON Semi MUR105	V_RRM = 50 V, t_rr = 75 ns, V_F = 0.92 V @ 1 A; same DO-41 package	Lower V_RRM limits use to ≤35 V systems; slower recovery increases switching loss at >100 kHz	Acceptable where 50 V rating suffices and cost sensitivity outweighs efficiency gain from UF4002HR0G's 50 ns t_rr

Compared with STTH1R04 and MUR105, the UF4002HR0G uniquely balances 100 V rating, 50 ns recovery, DO-41 fit, and AEC-Q101 compliance-making it optimal for space-constrained, automotive-qualified 24–48 V DC–DC designs where thermal and EMI performance are critical.

Availability

UF4002HR0G is available at Aetrix Electronics and suitable for DC–DC converters, switching-mode inverters, and freewheeling applications requiring stable component supply, automotive-grade reliability, and consistent DO-41 mechanical fit.

Supply support for UF4002HR0G 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, automotive, and consumer markets since 1979.

The UF400x family was developed specifically for high-efficiency, high-reliability rectification in switching power supplies-emphasizing ultrafast recovery, thermal robustness, and AEC-Q101 qualification for automotive subsystems.

FAQ

What is the peak repetitive reverse voltage rating of UF4002HR0G?

The UF4002HR0G has a peak repetitive reverse voltage (V_RRM) rating of 100 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (P2104), where UF4002 is explicitly assigned 100 V. It defines the maximum reverse-biased voltage the device can block repeatedly without breakdown under normal operating conditions.

Is UF4002HR0G AEC-Q101 qualified?

Yes, UF4002HR0G is AEC-Q101 qualified. The "H" suffix in the ordering code (UF4002HR0G) denotes AEC-Q101 qualification per Taiwan Semiconductor's ordering information table. This includes stress testing for temperature cycling, high-temperature reverse bias, and electrostatic discharge per automotive reliability standards.

What is the forward voltage drop of UF4002HR0G at 1 A and 25°C?

The forward voltage (V_F) of UF4002HR0G is 1.0 V maximum at I_F = 1 A and T_J = 25°C, as specified in the Electrical Specifications table for UF4001–UF4004 group. This low V_F contributes directly to reduced conduction losses in high-current, high-duty-cycle applications.

What is the reverse recovery time (t_rr) of UF4002HR0G?

The reverse recovery time (t_rr) of UF4002HR0G is 50 ns maximum, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value is shared with UF4001–UF4004 in the Electrical Specifications table and confirms its ultrafast classification for high-frequency switching.

Which package does UF4002HR0G use, and what are its key mechanical features?

UF4002HR0G uses the DO-204AL (DO-41) axial-leaded package. Key mechanical features include glass passivation for junction protection, pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, cathode band polarity marking, and a typical weight of 0.330 g-enabling compatibility with legacy through-hole assembly processes.

UF4002HR0G 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):: 100 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 @ 100 V

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

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

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

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

UF4002HR0G FAQ

1.How can I place an order for UF4002HR0G through Aetrix?

Please submit a Request for Quotation (RFQ) for UF4002HR0G 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 UF4002HR0G reliable?

The price and inventory of UF4002HR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF4002HR0G is usually 5 days.

3.What payment methods are accepted for UF4002HR0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF4002HR0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UF4002HR0G?

UF4002HR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UF4002HR0G 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 UF4002HR0G?

For technical support, including UF4002HR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF4002HR0G requirements.

6.How does Aetrix verify that UF4002HR0G is sourced from the original manufacturer or authorized distributors?

All UF4002HR0G 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 UF4002HR0G meets industry standards.

7.What is the process for return or replacement of UF4002HR0G?

All UF4002HR0G units undergo pre-shipment inspection (PSI). If there is an issue with UF4002HR0G, 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 UF4002HR0G part is unused and in its original packaging.

Return procedure for UF4002HR0G:

1.Submit a request within 90 days.

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

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