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Diodes Incorporated UF3003-T
- Part No.:
- UF3003-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
UF3003-T.pdf
- Description:
- DIODE GEN PURP 200V 3A DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:2,872
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Product details
Overview
UF3003-T from Diodes Incorporated is a 200V, 3.0A ultra-fast recovery rectifier diode in DO-201AD package, featuring 50ns reverse recovery time, 1.7V forward voltage at 3.0A, and 150A non-repetitive surge rating-designed for high-frequency switching power supplies, DC-DC converters, and freewheeling applications.
For engineers reviewing the UF3003-T datasheet, UF3003-T pinout, UF3003-T application, or UF3003-T equivalent, key selection criteria include peak repetitive reverse voltage (200V), average forward current (3.0A @ 55°C), ultra-fast trr (50ns), low IRM (5.0µA @ 25°C), and DO-201AD thermal resistance (35°C/W).
Technical Context
This ultra-fast rectifier uses a diffused junction structure to achieve rapid carrier recombination, enabling efficient operation in high-frequency AC/DC and DC/DC topologies where reverse recovery loss must be minimized. Its 50ns trr and low 75pF capacitance support switching frequencies up to several hundred kHz.
The device operates across –65°C to +150°C with a 35°C/W junction-to-ambient thermal resistance, requiring heatsinking only under sustained full-load conditions at elevated ambient temperatures. The cathode band polarity and tin-plated leads ensure reliable solderability per MIL-STD-202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in bridge or flyback snubber circuits. |
| IO @ TA=55°C | 3.0 A - Continuous DC output current capability when leads are held at ambient temperature at 9.5 mm from case. |
| VFM @ IF=3.0A | 1.7 V - Forward conduction loss at rated current; determines I²R heating and efficiency in high-current paths. |
| trr | 50 ns - Reverse recovery time measured at IF=0.5A, IR=1.0A, Irr=0.25A; critical for minimizing switching loss in SMPS. |
| IFSM | 150 A - Non-repetitive surge withstand for 8.3 ms half-sine; supports inrush and fault transient handling. |
| IRM @ 25°C | 5.0 µA - Low leakage at rated VR; reduces standby power loss in offline adapters and hold-up circuits. |
| RθJA | 35 °C/W - Thermal resistance from junction to ambient; used to calculate max junction temperature rise under given power dissipation. |
Pinout & Package
Package: DO-201AD molded plastic case (UL 94V-0), 1.1 g weight, cathode indicated by band, tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side of AC source or switch node; carries full load current during conduction phase. |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to output rail or energy storage node; sustains 200V reverse bias during off-state. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (trr = 50 ns) | Reduces switching losses and EMI generation in high-frequency rectification above 50 kHz. |
| 150A surge rating (8.3 ms) | Withstands cold-start inrush and short-circuit transients without degradation in AC/DC front-ends. |
| Low IRM (5.0 µA @ 25°C) | Minimizes standby power consumption and improves no-load efficiency in energy-sensitive designs. |
| DO-201AD package with 35°C/W RθJA | Enables compact layout while supporting 3.0A continuous operation with minimal heatsinking at ≤55°C ambient. |
| RoHS-compliant, lead-free finish | Meets EU Directive 2015/863/EU; suitable for commercial and industrial PCB assembly without exemption dependencies. |
Applications
| Switch-Mode Power Supply Output Rectification | DC-DC Converter Freewheeling Diode |
|---|---|
Use Scenario: Used as secondary-side rectifier in 100–500 kHz flyback or forward converters delivering 12–48 V outputs. IC Role / Device Role / Timing Role: Unidirectional current path that conducts during transformer reset/flyback phase and blocks reverse voltage during primary switch on-time. Use Value: 50 ns trr minimizes reverse recovery loss, improving efficiency by ~0.8% over standard fast rectifiers at 250 kHz. | Use Scenario: Placed across inductive load (e.g., buck converter output choke) to provide current continuity during high-side switch off-time. IC Role / Device Role / Timing Role: Freewheeling path enabling smooth current decay; must recover before next switching cycle to avoid shoot-through. Use Value: 1.7 V VFM at 3.0A ensures low conduction loss during extended off-periods, maintaining output regulation under dynamic load steps. |
| AC Input Bridge Leg (High-Frequency) | Snubber Network Clamping Diode |
Use Scenario: Employed in one leg of a high-frequency (≥20 kHz) AC input rectifier bridge feeding PFC stages or resonant inverters. IC Role / Device Role / Timing Role: Conducts positive half-cycle while blocking negative half-cycle; must sustain line-voltage transients and recover rapidly between cycles. Use Value: 200V VRRM and 150A IFSM allow robust operation under 264 VAC mains with surge immunity per IEC 61000-4-5. | Use Scenario: Integrated into RCD snubber networks across MOSFET drains or transformer primaries to clamp voltage spikes. IC Role / Device Role / Timing Role: Fast turn-on clamps overshoot within nanoseconds; low CT (75 pF) avoids resonance with snubber capacitor. Use Value: 75 pF typical capacitance prevents parasitic oscillation in 100–300 kHz snubbers, preserving gate drive integrity. |
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-277 package (surface-mount) | Lower profile, no axial leads; requires SMT reflow vs. through-hole wave solder | Select for space-constrained PCBs needing automated assembly and reduced board height. |
| US3M | 1000V VRRM, 3.0A IO, 75ns trr, DO-201AD package | Higher voltage rating but slower recovery; less efficient at high frequency | Select only if system requires >600V blocking and operates <100 kHz; avoid for SMPS >200 kHz. |
Compared with MURS320 and US3M, UF3003-T offers optimal balance of 200V rating, 50ns speed, and through-hole DO-201AD reliability-making it preferred for cost-sensitive, medium-frequency power supplies where manual or wave-solder assembly is used.
Availability
UF3003-T is available at Aetrix Electronics and suitable for switch-mode power supply output rectification, DC-DC converter freewheeling, and AC input bridge legs requiring stable component supply and long-term manufacturability.
Supply support for UF3003-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-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.
UF3003-T belongs to the UF300x ultra-fast rectifier product line, engineered specifically for high-frequency AC/DC and DC/DC conversion where low trr and controlled VFM are essential to minimize switching loss and thermal stress.
FAQ
What is the maximum junction temperature for UF3003-T?
The UF3003-T has an operating junction temperature range of –65°C to +150°C. Its absolute maximum Tj is 150°C; sustained operation above this threshold risks parametric shift or catastrophic failure. Derating curves in Figure 1 confirm 3.0A IO is valid only up to 55°C ambient unless heatsinked.
Is UF3003-T compatible with lead-free reflow processes?
Yes-UF3003-T features a lead-free, RoHS-compliant tin-plated finish and meets J-STD-020C Level 1 moisture sensitivity. It is qualified for standard Pb-free reflow profiles (peak 260°C), though its DO-201AD package is typically used in wave or hand-solder applications rather than SMT reflow.
How does UF3003-T differ from UF3002-T and UF3004-T?
UF3003-T is rated for 200V VRRM, positioned between UF3002-T (100V) and UF3004-T (400V). All share identical IO (3.0A), trr (50ns for UF3001–UF3003), VFM (1.7V), and package. Selection depends solely on required blocking voltage margin relative to circuit peak reverse stress.
Can UF3003-T replace a 1N4007 in a linear power supply?
No-UF3003-T is optimized for high-frequency switching (trr = 50 ns), not 50/60 Hz line-frequency rectification. While it can block 200V vs. 1N4007's 1000V, its higher VFM (1.7V vs. ~1.1V) increases conduction loss at low frequency, and its surge rating (150A) is lower than 1N4007's 30A (30A RMS, 50A surge). Use only in SMPS contexts.
UF3003-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):
- 200 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 @ 200 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
UF3003-T FAQ
1.How can I place an order for UF3003-T through Aetrix?
Please submit a Request for Quotation (RFQ) for UF3003-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 UF3003-T reliable?
The price and inventory of UF3003-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF3003-T is usually 5 days.
3.What payment methods are accepted for UF3003-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF3003-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF3003-T?
UF3003-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF3003-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 UF3003-T?
For technical support, including UF3003-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF3003-T requirements.
6.How does Aetrix verify that UF3003-T is sourced from the original manufacturer or authorized distributors?
All UF3003-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 UF3003-T meets industry standards.
7.What is the process for return or replacement of UF3003-T?
All UF3003-T units undergo pre-shipment inspection (PSI). If there is an issue with UF3003-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 UF3003-T part is unused and in its original packaging.
Return procedure for UF3003-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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Diodes Incorporated
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