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

Diodes Incorporated UG1002-T

Name: UG1002-T
Brand: Diodes Incorporated
SKU: UG1002-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UG1002-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

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

Datasheet:: UG1002-T.pdf

Description:: DIODE GEN PURP 100V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:5,638

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Product details

Overview

UG1002-T from Diodes Incorporated is a 1.0A ultra-fast glass passivated rectifier diode in DO-41 package, rated for 100V peak repetitive reverse voltage (V_RRM), 1.3V forward voltage at 1.0A (V_FM), and 50ns reverse recovery time (t_rr), used in high-frequency AC/DC conversion stages of offline power supplies.

For engineers reviewing the UG1002-T datasheet, UG1002-T pinout, UG1002-T application, or UG1002-T equivalent, key selection criteria include V_RRM, t_rr, I_FSM, thermal resistance (R_θJA = 95°C/W), and DO-41 mechanical compatibility in compact board layouts.

Technical Context

This device employs glass passivated die construction to ensure stable junction performance under fast-switching conditions and elevated temperature stress. Its ultra-fast recovery (50ns) enables efficient operation in 20–100kHz SMPS front-end rectification where low stored charge and minimal reverse recovery loss are critical.

The DO-41 axial package supports lead-free soldering per MIL-STD-202, with cathode band polarity marking and 0.35g mass. Thermal design must account for R_θJA = 95°C/W and derating above 55°C ambient, as specified in Figure 1.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum non-repetitive reverse voltage before breakdown; defines safe operating limit in bridge or half-wave rectifier configurations.
I_O	1.0 A @ T_A = 55°C - Continuous average forward current rating; requires heatsinking or layout derating above this ambient.
t_rr	50 ns - Reverse recovery time measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables high-frequency switching with low switching loss.
V_FM	1.3 V @ I_F = 1.0A - Forward voltage drop directly impacts conduction loss and thermal rise in rectifier stage.
I_FSM	30 A - Non-repetitive surge current capability for 8.3ms half-sine wave; supports inrush tolerance during power-up.
R_θJA	95 °C/W - Junction-to-ambient thermal resistance; determines temperature rise under given power dissipation without heatsink.

Pinout & Package

UG1002-T uses the standard DO-41 axial-leaded package with cathode identified by a painted band on the body. Leads are tin-plated and solderable per MIL-STD-202, Method 208.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to AC input or transformer secondary; must withstand peak inverse voltage during off-state.
Cathode	Forward current exit point	Marked with band; connects to output capacitor or load return; carries full rectified DC current.

Key Features

Feature	Design Value
Glass passivated die	Prevents surface contamination and leakage path formation, ensuring long-term reliability in humid or contaminated environments.
Ultra-fast switching (50ns t_rr)	Reduces reverse recovery charge (Q_rr) and associated switching losses in high-frequency rectifier applications.
30A surge rating	Withstands transient line surges and cold-start inrush without degradation, improving system robustness.
Low IR (5.0 μA @ 25°C)	Minimizes standby power loss in no-load or light-load conditions, supporting energy-efficient designs.

Applications

AC/DC Adapter Input Stage

DC-DC Converter Front-End

Use Scenario: Rectifying 50/60Hz or high-frequency AC from wall adapter transformer secondaries into unregulated DC bus.

IC Role / Device Role / Timing Role: Power diode performing half-wave or full-wave rectification; not timing-critical but thermally and electrically stressed.

Use Value: Low V_FM (1.3V) and 50ns t_rr reduce conduction and switching losses, improving adapter efficiency and thermal margin.

Use Scenario: Input rectification in isolated flyback or forward converter primary-side auxiliary supplies.

IC Role / Device Role / Timing Role: Discrete rectifier handling high dv/dt transients; operates synchronously with PWM switching frequency up to 100kHz.

Use Value: Glass passivation and 95°C/W R_θJA support stable operation in confined spaces with limited airflow.

Industrial Control Power Supply

LED Driver Auxiliary Rectification

Use Scenario: Providing isolated bias voltage for gate drivers or control ICs in motor drive inverters.

IC Role / Device Role / Timing Role: High-reliability rectifier in safety-isolated auxiliary winding circuits; exposed to EMI and thermal cycling.

Use Value: 30A I_FSM and -65°C to +150°C operating range ensure resilience against industrial surge events and ambient extremes.

Use Scenario: Rectifying AC feedback or sense signals in constant-current LED driver feedback loops.

IC Role / Device Role / Timing Role: Signal-level rectifier in analog sensing path; requires low leakage and stable capacitance.

Use Value: 5.0 μA IR and 20pF C_T minimize signal distortion and loading on precision current-sense networks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R04	V_RRM = 400V, t_rr = 35ns, V_FM = 1.3V @ 1A, DO-41	Higher voltage rating suits 230VAC mains designs; faster recovery reduces loss at >100kHz.	Select when higher V_RRM or lower t_rr is required; verify layout clearance for 400V standoff.
1N4934	V_RRM = 100V, t_rr = 200ns, V_FM = 1.2V @ 1A, DO-41	Slower recovery increases switching loss; lower V_FM benefits conduction-limited designs.	Acceptable only in low-frequency (<20kHz), low-loss-sensitivity applications; avoid in SMPS.

Compared with STTH1R04 and 1N4934, UG1002-T offers optimal balance of 100V rating, 50ns speed, and thermal performance for cost-sensitive 100–120VAC input supplies where space and efficiency are constrained.

Availability

UG1002-T is available at Aetrix Electronics and suitable for AC/DC adapters, industrial control power supplies, LED driver auxiliary circuits, and DC-DC converter front-ends requiring stable component supply and DO-41 form factor compatibility.

Supply support for UG1002-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, specializing in high-efficiency power management, signal integrity, and protection solutions.

The UG100x series belongs to Diodes' ultra-fast rectifier product line, designed specifically for high-frequency, high-reliability AC/DC conversion in consumer, industrial, and lighting power systems.

FAQ

Is UG1002-T RoHS compliant?

Yes, UG1002-T features a lead-free finish and complies with RoHS Directive 2011/65/EU, including exemptions for glass and high-temperature solder per Annex Notes 5 and 7. Tin-plated leads meet MIL-STD-202 solderability requirements.

What is the maximum operating temperature for UG1002-T?

The junction and storage temperature range is -65°C to +150°C. Derating begins at 55°C ambient per Figure 1; at 100°C ambient, the average forward current must be reduced to approximately 0.5A to maintain safe junction temperature.

Can UG1002-T replace UG1001-T in a design?

Yes, UG1002-T is a direct replacement for UG1001-T in terms of package, pinout, and thermal characteristics, but offers higher V_RRM (100V vs. 50V) and slightly higher V_FM (1.3V vs. 1.0V). Verify reverse voltage margin in the target circuit before substitution.

Why is UG1002-T marked "NOT RECOMMENDED FOR NEW DESIGN"?

This designation indicates Diodes Incorporated has introduced newer-generation alternatives (e.g., higher efficiency, lower Q_rr, or smaller packages) and recommends them for new projects. UG1002-T remains fully qualified and supported for legacy production and repair.

UG1002-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: -

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

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

UG1002-T FAQ

1.How can I place an order for UG1002-T through Aetrix?

Please submit a Request for Quotation (RFQ) for UG1002-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 UG1002-T reliable?

The price and inventory of UG1002-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UG1002-T is usually 5 days.

3.What payment methods are accepted for UG1002-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UG1002-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UG1002-T?

UG1002-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UG1002-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 UG1002-T?

For technical support, including UG1002-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UG1002-T requirements.

6.How does Aetrix verify that UG1002-T is sourced from the original manufacturer or authorized distributors?

All UG1002-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 UG1002-T meets industry standards.

7.What is the process for return or replacement of UG1002-T?

All UG1002-T units undergo pre-shipment inspection (PSI). If there is an issue with UG1002-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 UG1002-T part is unused and in its original packaging.

Return procedure for UG1002-T:

1.Submit a request within 90 days.

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

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