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

Diodes Incorporated UF1001-T

Name: UF1001-T
Brand: Diodes Incorporated
SKU: UF1001-T
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UF1001-T

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

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

Datasheet:: UF1001-T.pdf

Description:: DIODE GEN PURP 50V 1A DO41

Quantity:: RFQ Add To RFQ list

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Inventory:13,877

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Product details

Overview

UF1001-T from Diodes Incorporated is a 50 V, 1.0 A ultra-fast rectifier diode in DO-41 package, designed for high-efficiency AC/DC conversion in switch-mode power supplies and DC-DC converters. It delivers 1.0 V forward voltage at 1.0 A, 50 ns reverse recovery time, and 30 A non-repetitive surge capability - enabling compact, thermally efficient designs in offline adapters and LED drivers.

For engineers reviewing the UF1001-T datasheet, UF1001-T pinout, UF1001-T application, or UF1001-T equivalent, key selection criteria include peak repetitive reverse voltage (50 V), average rectified current (1.0 A @ 55°C), reverse recovery time (50 ns), forward voltage drop (1.0 V), and thermal resistance (95 K/W) - all critical for high-frequency rectification reliability and thermal management.

Technical Context

This ultra-fast rectifier uses a diffused junction process to achieve low trr (50 ns) and low V_F (1.0 V @ 1.0 A), making it suitable for 60–100 kHz SMPS topologies where switching losses must be minimized. Its 30 A I_FSM rating supports robust transient handling during startup or overload conditions.

The device operates across –65°C to +150°C with UL 94V-0 molded plastic case and plating compliant with MIL-STD-202 Method 208. Polarity is marked by cathode band; mounting position is unrestricted.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24–48 V input rectification stages.
I_O	1.0 A @ T_A = 55°C - Continuous DC output current capacity under standard heatsinking (9.5 mm lead length); defines power stage sizing.
V_FM	1.0 V @ I_F = 1.0 A - Low conduction loss improves efficiency in low-voltage secondary-side rectification.
t_rr	50 ns - Ultra-fast recovery minimizes switching loss and EMI in high-frequency flyback and forward converters.
R_JA	95 K/W - Junction-to-ambient thermal resistance without heatsink; determines temperature rise under 1.0 A load in open-frame PCB layout.
I_FSM	30 A (8.3 ms half-sine) - Surge withstand capability ensures reliability during cold-start or short-circuit events.

Pinout & Package

DO-41 axial-leaded plastic package with cathode band marking. Leads are tin-plated, solderable per MIL-STD-202 Method 208. Weight: 0.35 g. Mounting position: unrestricted.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unmarked end)	Forward current entry point	Connects to transformer secondary or switching node; polarity must match circuit topology to avoid reverse conduction.
Cathode (band-marked end)	Forward current exit / reverse blocking terminal	Connected to output capacitor or ground return path; band orientation confirms correct placement on PCB.

Key Features

Feature	Design Value
Ultra-fast recovery (50 ns)	Reduces switching loss and diode-induced ringing in 60–100 kHz SMPS, improving efficiency and easing EMI filter design.
Low V_F (1.0 V @ 1.0 A)	Lowers conduction loss by ~15% vs. standard fast rectifiers, directly increasing output efficiency in 5–24 V DC-DC outputs.
30 A surge rating	Supports reliable operation during inrush or fault transients without degradation - critical for unregulated adapter applications.
UL 94V-0 plastic case	Meets flammability safety requirements for Class II insulated power supplies and consumer-grade LED drivers.

Applications

AC-DC Adapter Secondary Rectification

USB PD Power Supply Output Stage

Use Scenario: 12 V/1.0 A output stage in compact wall-wart adapters using flyback topology.

IC Role / Device Role / Timing Role: Ultra-fast rectifier converting high-frequency transformer output to regulated DC; replaces slower 1N400x series.

Use Value: 50 ns t_rr reduces switching loss by >30% vs. 1N4007, lowering heat sink requirement and enabling smaller form factor.

Use Scenario: Secondary-side rectification in 20 W USB-C PD chargers with synchronous rectifier control disabled.

IC Role / Device Role / Timing Role: Standalone high-speed diode in quasi-resonant flyback; handles 100 kHz switching with minimal reverse recovery tail.

Use Value: 1.0 V V_F maintains >89% efficiency at full load while avoiding gate-drive complexity of MOSFET sync rectifiers.

Industrial LED Driver Output Stage

DC-DC Converter Input Protection

Use Scenario: Constant-current output rectification in 36 V, 0.35 A LED driver for street lighting modules.

IC Role / Device Role / Timing Role: Primary rectifier in isolated buck-boost topology; handles 60 Hz line harmonics and 50 kHz switching ripple.

Use Value: 95 K/W R_JA enables direct PCB trace heatsinking - eliminating discrete thermal pads in cost-sensitive outdoor fixtures.

Use Scenario: Reverse-polarity and back-EMF protection at input of 24 V industrial DC-DC converter.

IC Role / Device Role / Timing Role: Clamp diode absorbing inductive kickback from relay coils or motor drivers upstream of converter input.

Use Value: 30 A I_FSM safely clamps 25 A transients without failure, extending system uptime in factory automation equipment.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 60 V, t_rr = 55 ns, V_F = 1.15 V @ 1.0 A	Higher blocking voltage margin but slightly higher V_F; suited for 48 V input systems.	Select when 60 V V_RRM headroom is required over 50 V, and 150 mV V_F penalty is acceptable.
ON Semiconductor MUR105	V_RRM = 50 V, t_rr = 75 ns, V_F = 0.95 V @ 1.0 A	Lower V_F but slower recovery; better for lower-frequency (<50 kHz) designs where conduction loss dominates.	Prefer in cost-sensitive 24 V adapters operating below 40 kHz where efficiency gain from lower V_F outweighs EMI impact of longer t_rr.

Compared with STTH1R06 and MUR105, UF1001-T offers the optimal balance of 50 V rating, 50 ns speed, and 1.0 V forward drop - making it the most suitable choice for space-constrained, 60–100 kHz flyback adapters requiring predictable thermal behavior and low EMI.

Availability

UF1001-T is available at Aetrix Electronics and suitable for AC-DC adapters, USB PD chargers, industrial LED drivers, and DC-DC converter input protection requiring stable component supply and consistent parametric performance across production batches.

Supply support for UF1001-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 and manufacturing operations across Asia and the Americas.

The UF1001-T belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-frequency, high-efficiency AC/DC and DC/DC power conversion in consumer, industrial, and lighting applications.

FAQ

What is the maximum ambient temperature for continuous 1.0 A operation?

The UF1001-T sustains 1.0 A average rectified current only up to 55°C ambient temperature, assuming leads are held at ambient at 9.5 mm from the case. Above 55°C, derating is required per Figure 1 - e.g., 0.7 A at 85°C ambient. Thermal vias and copper pour improve real-world capability.

Can UF1001-T replace 1N4001 in a 50 Hz transformer-based power supply?

No - while both are DO-41 diodes, UF1001-T is optimized for high-frequency switching (50 ns t_rr) and has lower V_F, but its 50 V V_RRM matches 1N4001. However, its faster recovery offers no benefit at 50 Hz and may increase EMI; 1N4001 remains more cost-effective for line-frequency use.

Is UF1001-T lead-free and RoHS compliant?

Yes - UF1001-T meets RoHS Directive 2011/65/EU and is manufactured with lead-free terminations. The device complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1 and is compatible with standard reflow profiles per Diodes Inc. packaging specification DS25002.

How does reverse leakage compare between UF1001-T and UF1002-T?

At 25°C and rated V_R, UF1001-T specifies ≤5.0 µA IR, while UF1002-T (100 V) specifies ≤10 µA. Both exhibit <100 µA at 100°C. This difference reflects higher junction area and field stress in higher-voltage variants - not a reliability concern, but relevant for high-impedance bias networks.

UF1001-T Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 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 @ 50 V

Capacitance @ Vr, F:: 20pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-41

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

UF1001-T FAQ

1.How can I place an order for UF1001-T through Aetrix?

Please submit a Request for Quotation (RFQ) for UF1001-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 UF1001-T reliable?

The price and inventory of UF1001-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1001-T is usually 5 days.

3.What payment methods are accepted for UF1001-T?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1001-T transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UF1001-T?

UF1001-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UF1001-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 UF1001-T?

For technical support, including UF1001-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1001-T requirements.

6.How does Aetrix verify that UF1001-T is sourced from the original manufacturer or authorized distributors?

All UF1001-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 UF1001-T meets industry standards.

7.What is the process for return or replacement of UF1001-T?

All UF1001-T units undergo pre-shipment inspection (PSI). If there is an issue with UF1001-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 UF1001-T part is unused and in its original packaging.

Return procedure for UF1001-T:

1.Submit a request within 90 days.

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

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