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Diodes Incorporated UF3004-T
- Part No.:
- UF3004-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
UF3004-T.pdf
- Description:
- DIODE GEN PURP 400V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:6,769
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Product details
Overview
UF3004-T from Diodes Incorporated is a 400V, 3.0A ultra-fast recovery rectifier diode in DO-201AD package, featuring 50ns reverse recovery time, 1.3V forward voltage at 3.0A, and 150A non-repetitive surge capability-designed for high-frequency switching power supplies, AC/DC adapters, and DC/DC converter output stages.
For engineers reviewing the UF3004-T datasheet, UF3004-T pinout, UF3004-T application, or UF3004-T equivalent, key selection criteria include peak repetitive reverse voltage (400V), thermal resistance (35°C/W), reverse recovery time (50ns), forward voltage drop (1.3V @ 3A), and DO-201AD mechanical compatibility in compact power rectification designs.
Technical Context
This ultra-fast rectifier employs a diffused junction structure to achieve low reverse leakage (5.0µA @ 25°C) and fast switching performance critical for reducing switching losses in SMPS operating above 20kHz. Its 50ns trr and 75pF typical capacitance support efficient operation in flyback and forward converter topologies.
The device is rated for 3.0A average forward current at 55°C ambient with derating per Figure 1, and withstands 150A surge current (8.3ms half-sine) - enabling robustness against line transients and inrush events in industrial and consumer power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400V - Maximum repetitive reverse blocking voltage; defines safe AC input or DC bus voltage margin in bridge or single-diode rectifier configurations. |
| IO @ TA=55°C | 3.0A - Continuous DC output current capability under standard heatsinking (9.5mm lead length); sets minimum trace width and PCB copper area requirements. |
| VFM @ IF=3.0A | 1.3V - Forward voltage drop at rated load; directly determines conduction loss (3.9W) and thermal design baseline for TO-220-equivalent power dissipation. |
| trr | 50ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables stable operation up to ~200kHz without excessive ringing or EMI in hard-switched converters. |
| RθJA | 35°C/W - Junction-to-ambient thermal resistance; confirms need for minimal copper pour (≥1 cm²) on cathode pad to maintain Tj ≤150°C at full load. |
| IRM @ 25°C | 5.0µA - Peak reverse leakage at rated VRRM; ensures low standby power loss in offline PSUs meeting Energy Star or EU CoC Tier 2 requirements. |
Pinout & Package
Package: DO-201AD molded plastic case (UL 94V-0), 1.1g weight, tin-plated leads, cathode band polarity marking. Dimensions: A=25.40mm, B=7.20–9.50mm, C=1.20–1.30mm, D=4.80–5.30mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to AC source or transformer secondary; must withstand peak inverse voltage and surge current during conduction phase. |
| Cathode | Forward current exit / DC output terminal | Connected to output capacitor and load; serves as primary thermal path - requires direct copper connection for thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (trr = 50ns) | Reduces switching loss and EMI generation in high-frequency SMPS, enabling smaller filter components and higher power density. |
| 150A IFSM surge rating | Withstands cold-start inrush and line-voltage transients without degradation - eliminates need for external NTC or fusing in many 36W–65W adapters. |
| Low IRM (5.0µA @ 25°C) | Minimizes no-load power consumption in standby mode, supporting compliance with strict efficiency regulations (e.g., DOE Level VI, EU CoC v5). |
| DO-201AD RoHS-compliant package | Enables automated tape-and-reel placement (1.2K/reel) and lead-free reflow compatibility (J-STD-020C Level 1 moisture sensitivity). |
Applications
| AC/DC Adapters | DC/DC Converter Outputs |
|---|---|
Use Scenario: 12V/5A wall adapter for networking equipment with universal AC input (90–264VAC). IC Role / Device Role / Timing Role: Output rectifier in discontinuous conduction mode (DCM) flyback converter operating at 65kHz. Use Value: 50ns trr prevents tail current overlap with MOSFET turn-on, reducing cross-conduction loss and improving full-load efficiency by ≥0.8% vs. standard FRD. |
Use Scenario: Secondary-side rectification in isolated 48V-to-12V forward converter for telecom shelf power. IC Role / Device Role / Timing Role: Synchronous rectifier replacement where gate drive complexity is avoided. Use Value: 1.3V VFM yields lower conduction loss than Schottky alternatives above 85°C, maintaining >92% efficiency across -20°C to +70°C ambient. |
| Industrial Power Supplies | LED Driver Circuits |
Use Scenario: DIN-rail mounted 24V/10A power supply for PLC I/O modules with 300VAC surge immunity. IC Role / Device Role / Timing Role: Input bridge leg rectifier handling 50Hz/60Hz line frequency with capacitive input filtering. Use Value: 150A IFSM rating absorbs repeated 300V/10A surges per IEC 61000-4-5 Level 3, eliminating fuse dependency in Class I designs. |
Use Scenario: Constant-current LED driver for outdoor signage (120VAC input, 36V/700mA output). IC Role / Device Role / Timing Role: High-side rectifier in buck-derived topology with PWM dimming at 1kHz. Use Value: 75pF CT minimizes capacitive coupling noise into analog current sense path, preserving dimming linearity and flicker performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MURS320 | 200V VRRM, 3.0A IO, 35ns trr, TO-220AC package | Lower voltage rating limits use to ≤140VAC input; TO-220 requires heatsink for same current | Select when faster recovery (35ns) is prioritized over voltage headroom and board space is unconstrained. |
| US3M | 1000V VRRM, 3.0A IO, 75ns trr, DO-201AD package | Higher voltage rating adds margin for 277VAC lighting systems but increases VFM to 1.7V | Choose for universal-input LED drivers or industrial 277VAC applications where 1.7V drop is acceptable for safety margin. |
Compared with MURS320 and US3M, UF3004-T uniquely balances 400V blocking, 50ns speed, and DO-201AD footprint - making it optimal for cost-sensitive 100–240VAC adapters where thermal and EMI constraints exclude both lower-VRRM and higher-VFM alternatives.
Availability
UF3004-T is available at Aetrix Electronics and suitable for AC/DC adapters, DC/DC converter outputs, industrial power supplies, and LED driver circuits requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing.
Supply support for UF3004-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 power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.
UF3004-T belongs to the UF300x ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion where low trr and controlled VFM are essential to minimize system-level losses.
FAQ
What is the maximum allowable junction temperature for UF3004-T?
The absolute maximum junction temperature is +150°C, as specified in the Absolute Maximum Ratings table. Operation at this limit requires careful thermal design - including minimum 1 cm² copper pad on cathode, 9.5mm lead length, and ambient ≤55°C - to ensure RθJA of 35°C/W is achieved without exceeding Tj.
Can UF3004-T replace UF3003-T in an existing design?
Yes, UF3004-T is a direct upgrade from UF3003-T (200V) with identical DO-201AD package, pinout, and thermal characteristics. The increased VRRM (400V vs. 200V) provides additional safety margin for 230VAC inputs and transient suppression, with only a 0.4V increase in VFM (1.3V vs. 0.9V) at 3A.
Is UF3004-T suitable for synchronous rectification?
No - UF3004-T is a unidirectional silicon PN-junction rectifier, not a MOSFET-based synchronous rectifier. It lacks gate control and cannot be actively switched. It functions only as a passive, self-commutating diode and must be used in conventional rectifier configurations.
Does UF3004-T require derating for capacitive loads?
Yes - per the datasheet note, average forward current must be derated by 20% when used with capacitive-input filters. At TA = 55°C, the usable IO drops from 3.0A to 2.4A, requiring corresponding adjustments to trace width, copper area, and thermal interface to maintain safe junction temperature.
UF3004-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1.3 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 75pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
UF3004-T FAQ
1.How can I place an order for UF3004-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UF3004-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 UF3004-T reliable?
The price and inventory of UF3004-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF3004-T is usually 5 days.
3.What payment methods are accepted for UF3004-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF3004-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF3004-T?
UF3004-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF3004-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 UF3004-T?
For technical support, including UF3004-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF3004-T requirements.
6.How does Aetrix verify that UF3004-T is sourced from the original manufacturer or authorized distributors?
All UF3004-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 UF3004-T meets industry standards.
7.What is the process for return or replacement of UF3004-T?
All UF3004-T units undergo pre-shipment inspection (PSI). If there is an issue with UF3004-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 UF3004-T part is unused and in its original packaging.
Return procedure for UF3004-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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