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Diodes Incorporated UG3004-T
- Part No.:
- UG3004-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
UG3004-T.pdf
- Description:
- DIODE GEN PURP 400V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,898
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Product details
Overview
UG3004-T from Diodes Incorporated is a 400V, 3.0A ultra-fast glass passivated rectifier diode in DO-201AD package, optimized for high-efficiency AC/DC conversion in offline power supplies and switch-mode power adapters. It delivers 50ns reverse recovery time, 0.95V forward voltage at 3.0A, and withstands 125A non-repetitive surge current.
For engineers reviewing the UG3004-T datasheet, UG3004-T pinout, UG3004-T application, or UG3004-T equivalent, key selection criteria include peak repetitive reverse voltage (400V), average rectified current derating above 55°C, ultra-fast trr performance for reduced switching loss, and DO-201AD mechanical compatibility with legacy through-hole layouts.
Technical Context
This device operates as a single-phase, half-wave rectifier under 60Hz resistive or inductive loads, with mandatory 20% current derating for capacitive loads. Its glass passivated die construction ensures stable junction behavior across -65°C to +150°C operating range.
Thermal resistance is specified as 60°C/W (junction-to-ambient, leads held at ambient at 9.5mm from case), 15°C/W (junction-to-case), and 10°C/W (junction-to-leads), enabling accurate thermal design in compact power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum peak repetitive reverse voltage before breakdown; sets safe AC input voltage ceiling in bridge or single-diode rectification. |
| IO @ TA=55°C | 3.0 A - Continuous average forward current rating at 55°C ambient; defines usable DC output capability in thermally constrained enclosures. |
| VFM @ IF=3.0A | 0.95 V - Forward voltage drop at rated current; directly determines conduction loss (2.85W) and thermal load in linear operation. |
| trr | 50 ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables efficient operation up to ~200kHz switching frequencies. |
| IFSM | 125 A - Non-repetitive 8.3ms half-sine surge rating; supports inrush current handling during cold-start of power supplies. |
| IRM @ 25°C | 5.0 μA - Peak reverse leakage at rated blocking voltage; ensures minimal standby power loss in high-impedance bias networks. |
Pinout & Package
Package: DO-201AD molded plastic case (UL 94V-0), cathode band polarity marking, tin-plated leads solderable per MIL-STD-202 Method 208, weight ≈1.1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to AC source or transformer secondary; must handle full surge current and thermal stress during conduction. |
| Cathode | Forward current exit point | Connected to output filter capacitor or load; marked by visible band; carries same RMS current as anode but lower thermal resistance path to case. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Eliminates surface contamination and moisture ingress, ensuring long-term reliability in humid industrial environments. |
| Ultra-fast switching (50ns trr) | Reduces reverse recovery loss and EMI generation compared to standard recovery rectifiers in SMPS flyback outputs. |
| 125A surge rating | Withstands repeated cold-start inrush events without degradation, extending service life in unregulated AC-input applications. |
| Low IRM (5.0μA @25°C) | Minimizes standby power consumption in energy-sensitive designs such as EU CoC Tier 2 compliant adapters. |
Applications
| AC-DC Adapter Output Stage | Industrial Motor Drive Snubber Circuit |
|---|---|
Use Scenario: Rectifying 50/60Hz transformer secondary output in universal-input wall adapters delivering 5–24V DC. IC Role / Device Role / Timing Role: Primary output rectifier in single-ended flyback topology, conducting during transformer reset phase. Use Value: 0.95V VFM reduces conduction loss by ~15% vs. comparable 1.25V diodes, improving efficiency from 78% to 80.5% at 2A load. | Use Scenario: Clamping voltage spikes across IGBT gate drivers in 3-phase VFDs operating at 480VAC line voltage. IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing turn-off energy from parasitic inductance in gate loop. Use Value: 50ns trr prevents snap-off oscillation and limits peak clamping voltage to ≤650V, protecting 600V-rated gate drivers. |
| LED Driver Secondary Rectification | UPS Battery Charging Input Stage |
Use Scenario: Converting isolated DC output of constant-current LED driver transformers for streetlight modules (36–72V output). IC Role / Device Role / Timing Role: Synchronous rectification alternative where cost-sensitive designs avoid active MOSFET control. Use Value: 400V VRRM safely handles reflected transients from LED string open-circuit faults, avoiding catastrophic failure. | Use Scenario: Rectifying AC input to charge 48V lead-acid battery banks in line-interactive UPS systems with auto-transformer voltage regulation. IC Role / Device Role / Timing Role: Input-stage full-wave rectifier in dual-supply charging circuit with thermal foldback protection. Use Value: 3.0A IO rating supports 2.5A continuous charge current with 20°C margin at 55°C ambient, meeting UL1778 thermal safety limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH3L04S | 400V VRRM, 3.0A IO, 50ns trr, TO-220AC package (not DO-201AD) | Requires PCB footprint redesign; higher thermal mass enables 4.2A IO at 55°C but adds 12g weight | Select when higher surge robustness and heatsink-mounting are prioritized over board space. |
| ES3D | 200V VRRM, 3.0A IO, 35ns trr, DO-214AB package | Lower voltage rating restricts use to ≤140VAC inputs; smaller footprint but 30% lower surge rating (95A) | Select only for low-line (<230VAC) consumer electronics where ultra-low trr outweighs voltage margin. |
Compared with STTH3L04S and ES3D, UG3004-T uniquely balances DO-201AD through-hole compatibility, 400V blocking, and 50ns trr-making it optimal for retrofitting legacy power supplies without layout changes while maintaining efficiency and surge resilience.
Availability
UG3004-T is available at Aetrix Electronics and suitable for AC-DC adapter output stages, industrial motor drive snubber circuits, and LED driver secondary rectification requiring stable component supply and long-term manufacturing continuity.
Supply support for UG3004-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 UG300x series belongs to Diodes' ultra-fast rectifier product line, engineered specifically for high-efficiency, cost-sensitive offline power conversion where reliability under surge and thermal stress is critical.
FAQ
Is UG3004-T RoHS compliant and lead-free?
Yes, UG3004-T features a lead-free finish and is RoHS compliant per Directive 2011/65/EU Annex II exemptions for high-temperature solder and glass. Tin-plated leads meet MIL-STD-202 Method 208 solderability requirements, and JEDEC moisture sensitivity level is rated Level 1.
What is the maximum allowable ambient temperature for full 3.0A operation?
UG3004-T delivers its full 3.0A average rectified current only at TA = 55°C, as specified in the datasheet. Above this temperature, current must be linearly derated per Figure 1 - at 75°C ambient, maximum IO drops to 2.2A, and at 100°C, it falls to 1.3A.
Can UG3004-T replace UG3005 in a 600V design?
No. UG3004-T has a 400V peak repetitive reverse voltage (VRRM), while UG3005 is rated for 600V. Substituting UG3004-T in a 600V design risks premature avalanche breakdown and catastrophic failure under transient overvoltage conditions common in industrial mains environments.
Does UG3004-T require a heatsink in typical applications?
Not typically. With RθJA = 60°C/W and 2.85W conduction loss at 3.0A, junction temperature rise is ~171°C above ambient - exceeding the 150°C max rating. Therefore, either reduce current to ≤1.8A, improve airflow, or mount on copper pour ≥1 sq-in to achieve safe Tj; heatsinking is recommended for sustained >2.0A operation.
UG3004-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:
- 1.25 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:
- 60pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -65°C ~ 150°C
UG3004-T FAQ
1.How can I place an order for UG3004-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UG3004-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 UG3004-T reliable?
The price and inventory of UG3004-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UG3004-T is usually 5 days.
3.What payment methods are accepted for UG3004-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UG3004-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UG3004-T?
UG3004-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UG3004-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 UG3004-T?
For technical support, including UG3004-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UG3004-T requirements.
6.How does Aetrix verify that UG3004-T is sourced from the original manufacturer or authorized distributors?
All UG3004-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 UG3004-T meets industry standards.
7.What is the process for return or replacement of UG3004-T?
All UG3004-T units undergo pre-shipment inspection (PSI). If there is an issue with UG3004-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 UG3004-T part is unused and in its original packaging.
Return procedure for UG3004-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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