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Diodes Incorporated UF3002-T
- Part No.:
- UF3002-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
UF3002-T.pdf
- Description:
- DIODE GEN PURP 100V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:9,865
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Product details
Overview
UF3002-T from Diodes Incorporated is a 100V ultra-fast recovery rectifier diode in DO-201AD package, rated for 3.0A average forward current, 150A non-repetitive surge, and 1.3V forward voltage at 3.0A, used in high-frequency switching power supplies and DC-DC converters.
For engineers reviewing the UF3002-T datasheet, UF3002-T pinout, UF3002-T application, or UF3002-T equivalent, key selection criteria include reverse recovery time (75 ns), peak repetitive reverse voltage (100 V), thermal resistance (35 °C/W), and RoHS-compliant tin-plated leads.
Technical Context
This ultra-fast rectifier employs a diffused junction to achieve 75 ns reverse recovery time (trr) under IF = 0.5A / IR = 1.0A test conditions, enabling efficient operation in SMPS topologies above 50 kHz. Its 100 V VRRM rating and 3.0 A IO rating are specified at TA = 55°C with leads held at ambient temperature at 9.5 mm from case.
The device exhibits low reverse leakage (100 µA at 100°C) and typical junction-to-ambient thermal resistance of 35 °C/W. Total capacitance is 50 pF at 1 MHz and 4.0 V reverse bias, supporting stable high-frequency rectification without excessive ringing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in bridge or flyback configurations. |
| IO @ TA=55°C | 3.0 A - Continuous average forward current capability with derating above 55°C ambient; requires heatsinking beyond that point. |
| VFM @ IF=3.0A | 1.3 V - Forward voltage drop determining conduction loss and thermal dissipation in high-current paths. |
| trr | 75 ns - Reverse recovery time defining switching speed and EMI generation in hard-switched converters. |
| IFSM | 150 A - Non-repetitive surge current handling for inrush or fault conditions; critical for input stage robustness. |
| RθJA | 35 °C/W - Junction-to-ambient thermal resistance; determines temperature rise under natural convection cooling. |
| IRM @ 100°C | 100 µA - High-temperature reverse leakage affecting standby power and reliability in hot environments. |
Pinout & Package
DO-201AD molded plastic package with axial leads, cathode band marking, and tin-plated solderable terminals per MIL-STD-202 Method 208. Moisture sensitivity level 1 (J-STD-020C), UL 94V-0 flammability rating, approximate weight 1.1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry terminal | Connected to AC source or transformer secondary in half-wave rectification; polarity-sensitive for correct conduction direction. |
| Cathode | Forward current exit terminal | Marked by band; ties to output capacitor or load return; reverse-biased during off-state to block voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (75 ns) | Enables high-frequency switching (>100 kHz) with minimal switching loss and reduced EMI in compact SMPS designs. |
| 150 A surge rating | Withstands cold-start inrush and transient overloads without degradation, improving system reliability in unregulated inputs. |
| Low 1.3 V forward drop | Reduces conduction loss at 3.0 A, lowering thermal stress and simplifying heatsink requirements in space-constrained layouts. |
| RoHS-compliant tin finish | Ensures lead-free assembly compatibility and long-term solder joint integrity per JEDEC J-STD-020C Level 1 moisture handling. |
Applications
| AC-DC Adapter Input Stage | DC-DC Converter Output Rectification |
|---|---|
Use Scenario: 100–240 VAC input rectification feeding a PFC or flyback controller in wall adapters and chargers. IC Role / Device Role / Timing Role: Ultra-fast rectifier providing low-loss, low-noise AC-to-DC conversion prior to regulation. Use Value: 75 ns trr minimizes switching node oscillation and reduces EMI filter component count versus standard fast recovery diodes. | Use Scenario: Secondary-side synchronous or diode rectification in isolated 12 V/5 V/3.3 V DC-DC modules for telecom and industrial equipment. IC Role / Device Role / Timing Role: High-efficiency freewheeling path during MOSFET off-time in forward or flyback topologies. Use Value: 1.3 V VFM at 3.0 A delivers <3.9 W conduction loss, easing thermal management in sealed enclosures. |
| Automotive LED Driver Input Stage | Industrial Motor Drive Snubber Circuit |
Use Scenario: Rectifying 12 V/24 V battery-supplied AC ripple or auxiliary winding outputs in automotive LED lighting systems. IC Role / Device Role / Timing Role: Input protection and DC rail generation with surge immunity against load dump transients. Use Value: 150 A IFSM withstands ISO 7637-2 pulse 5a events without failure, eliminating need for external TVS clamping. | Use Scenario: Clamp diode in RCD snubber networks across IGBTs or MOSFETs in variable frequency drives and servo amplifiers. IC Role / Device Role / Timing Role: Fast turn-off path for snubber capacitor discharge, limiting voltage overshoot during switching transitions. Use Value: 75 ns trr ensures rapid recombination, preventing delayed turn-on that could cause destructive voltage spikes above 600 V. |
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 | 200 V VRRM, 3.0 A IO, 35 ns trr, SMC package (surface-mount) | Higher voltage rating and faster recovery, but requires PCB rework for SMD layout vs. axial DO-201AD through-hole | Select when board space is constrained and higher voltage margin or lower trr is required; verify thermal pad design for SMC. |
| US3M | 1000 V VRRM, 3.0 A IO, 75 ns trr, DO-201AD package, 1.7 V VFM | Same package and trr, but higher blocking voltage and higher forward drop increases conduction loss | Choose only if system requires >600 V isolation or enhanced surge margin; avoid where efficiency at 3.0 A is critical. |
Compared with MURS320 and US3M, UF3002-T offers optimal balance of 100 V rating, 1.3 V forward drop, and DO-201AD through-hole compatibility-making it ideal for cost-sensitive, thermally managed, mid-voltage power supplies where layout flexibility and soldering simplicity are prioritized.
Availability
UF3002-T is available at Aetrix Electronics and suitable for AC-DC adapters, DC-DC converter output stages, and automotive LED driver input rectification requiring stable component supply and consistent tape-and-reel delivery.
Supply support for UF3002-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-performance, energy-efficient components for power management and signal integrity.
The UF300x series belongs to Diodes' ultra-fast rectifier product line, designed specifically for high-frequency switching power supplies where low trr, low VFM, and robust surge capability are essential for efficiency and reliability.
FAQ
What is the maximum junction temperature for UF3002-T?
The UF3002-T has an operating junction temperature range of –65°C to +150°C. Its absolute maximum Tj is +150°C, and sustained operation above this threshold risks permanent degradation. Thermal design must ensure junction temperature remains within limits using the specified RθJA of 35°C/W and appropriate PCB copper area or heatsinking.
Is UF3002-T compatible with lead-free reflow soldering?
Yes - UF3002-T features tin-plated leads compliant with RoHS and qualified for lead-free reflow soldering per JEDEC J-STD-020C Level 1 moisture sensitivity. The device supports peak reflow temperatures up to 260°C for ≤10 seconds, with no preconditioning required due to its moisture-insensitive classification.
How does UF3002-T differ from UF3001-T and UF3003-T?
UF3002-T is rated for 100 V VRRM, positioned between UF3001-T (50 V) and UF3003-T (200 V). All share identical package (DO-201AD), forward current (3.0 A), trr (75 ns), and thermal characteristics. The primary difference is blocking voltage rating - select based on circuit's maximum reverse voltage requirement with ≥20% safety margin.
Can UF3002-T be used in full-wave bridge configurations?
Yes - UF3002-T is commonly used as one leg in discrete full-wave bridge rectifiers. Its 100 V VRRM supports up to 70 V RMS input (100 V peak), making it suitable for 60–70 VAC transformer secondaries. Ensure all four diodes are matched for balanced current sharing and thermal distribution across the bridge assembly.
UF3002-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):
- 100 V
- Current - Average Rectified (Io):
- 3A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 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
UF3002-T FAQ
1.How can I place an order for UF3002-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UF3002-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 UF3002-T reliable?
The price and inventory of UF3002-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF3002-T is usually 5 days.
3.What payment methods are accepted for UF3002-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF3002-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF3002-T?
UF3002-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF3002-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 UF3002-T?
For technical support, including UF3002-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF3002-T requirements.
6.How does Aetrix verify that UF3002-T is sourced from the original manufacturer or authorized distributors?
All UF3002-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 UF3002-T meets industry standards.
7.What is the process for return or replacement of UF3002-T?
All UF3002-T units undergo pre-shipment inspection (PSI). If there is an issue with UF3002-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 UF3002-T part is unused and in its original packaging.
Return procedure for UF3002-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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