My Inquiry
My Account
Diodes Incorporated UF2004-T
- Part No.:
- UF2004-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
UF2004-T.pdf
- Description:
- DIODE GEN PURP 400V 2A DO15
- Quantity:
- Payment:
- Shipping:
Inventory:2,172
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UF2004-T from Diodes Incorporated is a 400V, 2.0A ultra-fast rectifier diode in DO-15 package, featuring 50ns reverse recovery time, 1.3V forward voltage at 2.0A, and 60A non-repetitive surge capability - used in switch-mode power supply output stages and DC-DC converter freewheeling paths.
For engineers reviewing the UF2004-T datasheet, UF2004-T pinout, UF2004-T application, or UF2004-T equivalent, key selection criteria include peak repetitive reverse voltage (400V), thermal resistance (50°C/W), reverse leakage (5.0µA @25°C), and automotive-grade packaging compliance per J-STD-020 Level 1.
Technical Context
This ultra-fast rectifier uses a diffused junction structure to achieve low reverse recovery charge and minimal switching losses in high-frequency AC/DC and DC/DC conversion circuits. Its 50ns trr and 1.3V VFM at 2.0A support efficient operation up to 100kHz switching frequencies.
The device is rated for 2.0A average forward current at TA = +50°C with derating above that ambient, and withstands 60A single-half-sine surge (8.3ms) - enabling robust performance in transient-prone industrial power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400V - Maximum repetitive reverse voltage before breakdown; sets usable input voltage range in bridge or flyback outputs. |
| IO @ TA=50°C | 2.0A - Continuous DC output current capability with leads held at ambient at 9.5mm from case; defines steady-state power handling. |
| VFM @ IF=2.0A | 1.3V - Forward voltage drop determining conduction loss (2.6W max at 2.0A); impacts thermal design and efficiency. |
| trr | 50ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; limits minimum practical switching frequency and EMI generation. |
| IFSM (8.3ms) | 60A - Non-repetitive surge rating; supports inrush current tolerance during power-up or fault conditions. |
| RθJA | 50°C/W - Junction-to-ambient thermal resistance; determines temperature rise under natural convection cooling without heatsink. |
| IRM @25°C | 5.0µA - Reverse leakage at rated blocking voltage; critical for low-power standby modes and high-impedance sensing nodes. |
Pinout & Package
Package: DO-15 molded plastic case (UL 94V-0), cathode indicated by band, tin-plated terminals, 0.4g weight, moisture sensitivity Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of AC source or inductive load return path. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to positive rail in half-wave rectification or switch-node in synchronous buck freewheeling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast switching (50ns trr) | Reduces switching loss and EMI in 50–100kHz SMPS designs compared to standard rectifiers (e.g., 1N4007: ~2µs). |
| 60A surge rating | Withstands capacitor-charging inrush and short-circuit transients without failure in 24V/48V industrial supplies. |
| Low 5.0µA reverse leakage @25°C | Minimizes standby power loss in always-on auxiliary rails and improves voltage hold-up accuracy. |
| DO-15 package with J-STD-020 Level 1 MSL | Enables standard reflow assembly without baking; compatible with automated pick-and-place and wave soldering. |
Applications
| AC/DC Adapter Output Stage | DC-DC Buck Converter Freewheeling Diode |
|---|---|
Use Scenario: Secondary-side rectification in 12V/24V offline adapters with 65–100kHz flyback topology. IC Role / Device Role / Timing Role: Unidirectional current path during transformer demagnetization; blocks reverse voltage during primary switch on-time. Use Value: 50ns trr minimizes voltage overshoot across MOSFET clamp components and reduces snubber losses. | Use Scenario: High-side switch buck regulator supplying FPGA core voltage (1.2V/10A) from 12V bus. IC Role / Device Role / Timing Role: Freewheeling path during low-side switch off-time; conducts inductor current until next cycle. Use Value: 1.3V VFM at 2.0A enables >92% efficiency at light loads without synchronous rectification complexity. |
| Industrial Motor Drive Snubber Network | Automotive HVAC Blower Power Supply |
Use Scenario: RC snubber clamp across IGBT collector-emitter in 3-phase inverter drives (24V/48V). IC Role / Device Role / Timing Role: Fast turn-off path for snubber capacitor discharge; absorbs inductive energy spikes. Use Value: 60A IFSM handles repeated 40A motor stall surges without degradation over 10-year field life. | Use Scenario: 12V-to-5V isolated DC-DC module powering HVAC control MCU and sensors. IC Role / Device Role / Timing Role: Output rectifier in miniature flyback transformer secondary winding. Use Value: RoHS-compliant tin finish and IATF 16949 manufacturing ensure AEC-Q200 compatibility for under-hood deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2R04 | Same 400V VRRM, 2A IO, but TO-220AC package; 35ns trr, 1.35V VFM. | Requires heatsink mounting; unsuitable for space-constrained DO-15 footprints. | Select when higher surge margin (100A IFSM) and lower trr justify larger footprint and thermal management. |
| ON Semiconductor MUR240 | 400V VRRM, 2A IO, DO-15; 50ns trr, 1.3V VFM - identical electrical specs, different marking and traceability. | Same board-level fit; qualified to AEC-Q101 for automotive use. | Choose for automotive PPAP programs requiring AEC-Q101 qualification and alternate supply chain diversification. |
Compared with STTH2R04 and MUR240, UF2004-T offers direct DO-15 drop-in replacement capability with verified 50ns trr and 1.3V VFM, while maintaining Diodes' IATF 16949 production control and J-STD-020 Level 1 assembly readiness.
Availability
UF2004-T is available at Aetrix Electronics and suitable for AC/DC adapters, DC-DC buck converters, and industrial motor drive snubbers requiring stable component supply and legacy-design continuity.
Supply support for UF2004-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.
UF2004-T belongs to the UF200x ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion where low trr and controlled VFM are critical to system-level thermal and EMI performance.
FAQ
Is UF2004-T still in active production?
No - UF2004-T is officially marked obsolete per Diodes' DS25007 Rev. 5 (May 2023). Aetrix Electronics maintains limited legacy stock and supports last-time-buy programs with full traceability and documentation for ongoing production continuity.
Can UF2004-T replace UF2003-T in a 200V design?
Yes - UF2004-T has higher VRRM (400V vs. 200V) and identical package, pinout, and thermal characteristics. It provides increased voltage margin without layout changes, though forward voltage is slightly higher (1.3V vs. 1.0V at 2.0A), affecting conduction loss.
What is the maximum operating temperature for continuous 2.0A current?
Continuous 2.0A operation is rated only at TA = +50°C with leads maintained at ambient at 9.5mm from case. At higher ambient temperatures, current must be derated per Figure 1 - e.g., 1.5A at +75°C, 1.0A at +100°C - due to RθJA = 50°C/W limitation.
Does UF2004-T meet automotive qualification standards?
UF2004-T is manufactured in IATF 16949-certified facilities and supports PPAP, but it is not individually qualified to AEC-Q101. For automotive applications, Diodes recommends MUR240 (AEC-Q101 qualified) or contacting their automotive team for change-controlled variants.
UF2004-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):
- 400 V
- Current - Average Rectified (Io):
- 2A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 2 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 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
UF2004-T FAQ
1.How can I place an order for UF2004-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UF2004-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 UF2004-T reliable?
The price and inventory of UF2004-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF2004-T is usually 5 days.
3.What payment methods are accepted for UF2004-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF2004-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF2004-T?
UF2004-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF2004-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 UF2004-T?
For technical support, including UF2004-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF2004-T requirements.
6.How does Aetrix verify that UF2004-T is sourced from the original manufacturer or authorized distributors?
All UF2004-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 UF2004-T meets industry standards.
7.What is the process for return or replacement of UF2004-T?
All UF2004-T units undergo pre-shipment inspection (PSI). If there is an issue with UF2004-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 UF2004-T part is unused and in its original packaging.
Return procedure for UF2004-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UF2004-T Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
