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

Taiwan Semiconductor Corporation UF4002 R0G

Name: UF4002 R0G
Brand: Taiwan Semiconductor Corporation
SKU: UF4002 R0G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UF4002 R0G

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

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

Datasheet:: UF4002 R0G.pdf

Description:: DIODE GEN PURP 100V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:3,759

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Product details

Overview

UF4002 R0G 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 rating. It serves as a freewheeling or output rectifier in high-frequency switching power supplies.

For engineers reviewing the UF4002 R0G datasheet, UF4002 R0G pinout, UF4002 R0G application, or UF4002 R0G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), ultrafast trr (≤50 ns), thermal resistance (R_θJL = 15 °C/W), RoHS/halogen-free compliance, and AEC-Q101 qualification availability.

Technical Context

This discrete silicon PN junction rectifier uses glass passivated chip construction for stable high-temperature operation up to 150 °C junction temperature. Its ultrafast recovery enables efficient operation in DC–DC converters and SMPS operating above 50 kHz.

The device exhibits low forward voltage drop (VF ≤ 1.0 V @ IF = 1 A, TJ = 25 °C) and low junction capacitance (CJ = 17 pF @ 1 MHz, VR = 4 V), supporting reduced conduction loss and minimized switching noise in high-speed rectification paths.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking range in 12–48 V output circuits.
I_F	1 A continuous - Rated average forward current; supports sustained 12 W dissipation with proper heatsinking.
t_rr	≤50 ns - Ultrafast reverse recovery time; minimizes switching loss and EMI in >100 kHz converters.
V_F	≤1.0 V @ 1 A - Low forward voltage drop; reduces conduction loss by ~15% vs standard 1N400x series.
R_θJL	15 °C/W - Junction-to-lead thermal resistance; enables direct PCB copper pad heat transfer without external heatsink.
I_FSM	30 A - Non-repetitive surge rating; withstands inrush currents during cold-start of buck or flyback converters.

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 (unbanded end)	Forward current entry	Connected to lower-potential node (e.g., switch node in buck converter); accepts 1 A DC or 30 A surge.
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to output rail or ground return; blocks up to 100 V reverse bias with <5 µA leakage at 25 °C.

Key Features

Feature	Design Value
Glass passivated junction	Enables stable operation at TJ = 150 °C and improves humidity resistance per JESD22-A110.
Ultrafast 50 ns recovery	Reduces reverse recovery charge (Q_rr) to <15 nC, lowering diode-induced switching loss in hard-switched topologies.
RoHS & halogen-free	Complies with IEC 61249-2-21; eliminates brominated flame retardants and supports lead-free reflow assembly.
Pure tin-plated leads	Ensures solderability per J-STD-002; compatible with SnPb and SAC305 alloys without intermetallic degradation.

Applications

DC–DC Converter Output Rectification	Switch-Mode Power Supply Freewheeling
Use Scenario: Secondary-side rectification in isolated 5–24 V output flyback or forward converters operating at 65–200 kHz. IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during positive half-cycle. Use Value: 1.0 V VF and 50 ns trr reduce power loss by ≥12% versus standard rectifiers, improving efficiency in compact adapters.	Use Scenario: Freewheeling path across inductive loads (e.g., relay coils, solenoids, motor windings) in automotive body control modules. IC Role / Device Role / Timing Role: Clamp inductive kickback energy to prevent MOSFET drain overvoltage during turn-off. Use Value: 30 A IFSM rating safely absorbs 10–100 ms transients; 150 °C TJ max ensures reliability under under-hood thermal stress.
AC–DC Adapter Input Bridge Leg	Industrial LED Driver Rectification
Use Scenario: One leg of full-wave bridge rectifier in universal-input (85–265 VAC) offline adapters delivering ≤12 W. IC Role / Device Role / Timing Role: Half-wave rectifier conducting during negative input half-cycle; paired with three identical devices. Use Value: 100 V VRRM provides 2× safety margin over 50 V peak reverse in 265 VAC input; DO-41 package fits legacy through-hole layouts.	Use Scenario: Output rectification in constant-current LED drivers for street lighting or industrial signage (36–72 V output). IC Role / Device Role / Timing Role: High-efficiency DC path delivering steady current to LED string while rejecting ripple. Use Value: Low CJ (17 pF) minimizes high-frequency noise coupling into sensitive current-sense circuitry.

DC–DC Converter Output Rectification

Switch-Mode Power Supply Freewheeling

Use Scenario: Secondary-side rectification in isolated 5–24 V output flyback or forward converters operating at 65–200 kHz.

IC Role / Device Role / Timing Role: Unidirectional current valve converting transformer AC output to regulated DC; conducts only during positive half-cycle.

Use Value: 1.0 V VF and 50 ns trr reduce power loss by ≥12% versus standard rectifiers, improving efficiency in compact adapters.

Use Scenario: Freewheeling path across inductive loads (e.g., relay coils, solenoids, motor windings) in automotive body control modules.

IC Role / Device Role / Timing Role: Clamp inductive kickback energy to prevent MOSFET drain overvoltage during turn-off.

Use Value: 30 A IFSM rating safely absorbs 10–100 ms transients; 150 °C TJ max ensures reliability under under-hood thermal stress.

AC–DC Adapter Input Bridge Leg

Industrial LED Driver Rectification

Use Scenario: One leg of full-wave bridge rectifier in universal-input (85–265 VAC) offline adapters delivering ≤12 W.

IC Role / Device Role / Timing Role: Half-wave rectifier conducting during negative input half-cycle; paired with three identical devices.

Use Value: 100 V VRRM provides 2× safety margin over 50 V peak reverse in 265 VAC input; DO-41 package fits legacy through-hole layouts.

Use Scenario: Output rectification in constant-current LED drivers for street lighting or industrial signage (36–72 V output).

IC Role / Device Role / Timing Role: High-efficiency DC path delivering steady current to LED string while rejecting ripple.

Use Value: Low CJ (17 pF) minimizes high-frequency noise coupling into sensitive current-sense circuitry.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	Same 1 A / 400 V rating but higher VF (1.3 V), longer trr (60 ns), TO-220AC package.	Requires heatsink for >0.5 A continuous; unsuitable for space-constrained DO-41 footprints.	Select when higher VRRM (400 V) is required and board space allows TO-220 mounting.
ON Semi MUR110	Identical DO-41 package, 1 A / 100 V, trr = 50 ns, but VF = 0.95 V (slightly lower), no AEC-Q101 option.	Same mechanical fit and electrical envelope; lacks automotive qualification path.	Prefer for cost-sensitive industrial designs where AEC-Q101 is not mandated.

Compared with STTH1R04 and MUR110, the UF4002 R0G offers optimal balance of low VF (≤1.0 V), ultrafast trr (≤50 ns), DO-41 compatibility, and optional AEC-Q101 qualification-making it ideal for high-density, thermally constrained, or automotive-grade 100 V rectification.

Availability

UF4002 R0G is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for UF4002 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 automotive markets since 1979.

The UF400x series targets high-efficiency, high-reliability rectification in compact power conversion systems-designed specifically for demanding switching frequencies, elevated ambient temperatures, and stringent environmental compliance.

FAQ

What is the maximum junction temperature rating for UF4002 R0G?

The UF4002 R0G has a maximum junction temperature (T_J) of +150 °C, verified per absolute maximum ratings in the official TSC datasheet P2104. This rating enables reliable operation in under-hood automotive environments or enclosed industrial enclosures where ambient temperatures exceed 85 °C. Derating curves confirm usable current capacity down to 0.5 A at 125 °C ambient with standard PCB copper area.

Is UF4002 R0G pin-compatible with other UF400x series diodes?

Yes, UF4002 R0G shares identical DO-204AL (DO-41) package dimensions, lead spacing, and polarity marking (cathode band) with all UF4001–UF4007 variants. Mechanical interchangeability is confirmed in the TSC package outline drawing. However, electrical parameters-including V_RRM, V_F, and t_rr-differ across the series, so substitution requires verification against circuit voltage and timing requirements.

Does UF4002 R0G meet automotive qualification standards?

The base UF4002 R0G is not AEC-Q101 qualified; however, the variant UF4002H (marked "H") is explicitly qualified per AEC-Q101. The "R0G" suffix denotes green compound and tape-and-reel packaging-not qualification status. Engineers requiring automotive use must specify UF4002H or confirm qualification status via TSC's official part number matrix before design-in.

What is the reverse recovery time (t_rr) specification for UF4002 R0G?

The UF4002 R0G has a maximum reverse recovery time (t_rr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per the TSC P2104 datasheet. This value applies to UF4001–UF4004 variants and is confirmed in the Electrical Specifications table. It reflects true ultrafast behavior critical for minimizing switching loss in high-frequency SMPS designs.

How does the forward voltage (V_F) of UF4002 R0G compare to standard 1N400x diodes?

UF4002 R0G specifies V_F ≤ 1.0 V at 1 A and 25 °C, whereas 1N4002 exhibits V_F ≈ 1.1 V under identical conditions. This 0.1 V reduction lowers conduction loss by ~10% at full load, directly improving thermal performance and system efficiency-especially valuable in compact, unventilated power supplies where heat dissipation is limited.

UF4002 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):: 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:: -

Qualification:: -

Mounting Type:: Through Hole

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

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

UF4002 R0G FAQ

1.How can I place an order for UF4002 R0G through Aetrix?

Please submit a Request for Quotation (RFQ) for UF4002 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 UF4002 R0G reliable?

The price and inventory of UF4002 R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF4002 R0G is usually 5 days.

3.What payment methods are accepted for UF4002 R0G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF4002 R0G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UF4002 R0G?

UF4002 R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UF4002 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 UF4002 R0G?

For technical support, including UF4002 R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF4002 R0G requirements.

6.How does Aetrix verify that UF4002 R0G is sourced from the original manufacturer or authorized distributors?

All UF4002 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 UF4002 R0G meets industry standards.

7.What is the process for return or replacement of UF4002 R0G?

All UF4002 R0G units undergo pre-shipment inspection (PSI). If there is an issue with UF4002 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 UF4002 R0G part is unused and in its original packaging.

Return procedure for UF4002 R0G:

1.Submit a request within 90 days.

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

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