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Taiwan Semiconductor Corporation UF4002
- Part No.:
- UF4002
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF4002.pdf
- Description:
- DIODE GEN PURP 100V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,317
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Product details
Overview
UF4002 from Taiwan Semiconductor is a 1A, 100V ultrafast recovery rectifier diode in DO-204AL (DO-41) package, featuring 50 ns reverse recovery time, 1.0 V forward voltage at 1 A, and 30 A surge current capability. It serves as a freewheeling or output rectifier in switching-mode power supplies.
For engineers reviewing the UF4002 datasheet, UF4002 pinout, UF4002 application, or UF4002 equivalent, key selection criteria include its 100 V repetitive peak reverse voltage, ultrafast trr ≤ 50 ns, low VF performance at 1 A, thermal resistance RθJL = 15 °C/W, and AEC-Q101 qualification availability.
Technical Context
The UF4002 is a single-die, glass-passivated silicon junction rectifier optimized for high-frequency switching applications. Its ultrafast recovery (trr ≤ 50 ns) and low forward voltage (VF ≤ 1.0 V @ 1 A, 25°C) minimize conduction and switching losses in DC–DC converters and inverters.
Designed for operation up to TJ = 150°C, it delivers stable performance under thermal stress with RθJA = 60 °C/W and RθJL = 15 °C/W. The DO-204AL (DO-41) package supports lead-free soldering per J-STD-002 and meets UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in flyback or boost topologies |
| IF | 1 A - Continuous average forward current; sets steady-state power handling in rectification paths |
| trr | ≤ 50 ns - Ultrafast reverse recovery time; reduces switching loss and EMI in >50 kHz SMPS designs |
| VF | ≤ 1.0 V @ 1 A, 25°C - Low forward voltage drop; improves efficiency and reduces thermal load at rated current |
| IFSM | 30 A - Non-repetitive surge current capacity; withstands inrush and transient overloads without failure |
| TJ max | +150 °C - Maximum junction temperature; enables reliable operation in compact, thermally constrained enclosures |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, glass-passivated, RoHS-compliant, halogen-free molding compound. Cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node or transformer secondary center-tap) |
| Cathode | Forward current exit / reverse blocking terminal | Connected to output rail or filter capacitor; polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enhances long-term reliability and moisture resistance in humid or industrial environments |
| Ultrafast recovery (trr ≤ 50 ns) | Enables efficient operation in high-frequency (>100 kHz) switching converters with minimal tail current loss |
| Low VF (≤1.0 V @ 1 A) | Reduces conduction loss by ~15% vs. standard fast rectifiers, lowering heatsink requirements |
| AEC-Q101 qualification option | Supports automotive-grade deployment in engine control, lighting, and ADAS power stages |
Applications
| DC–DC Converter Output Rectification | Switching Inverter Freewheeling |
|---|---|
Use Scenario: Secondary-side rectification in isolated buck-boost or forward converters operating at 50–200 kHz. IC Role / Device Role / Timing Role: Unidirectional current valve converting high-frequency AC from transformer secondary to regulated DC output. Use Value: 50 ns trr and 1.0 V VF jointly reduce total power loss by ≥12% compared to standard FR107-class diodes at 100 kHz. | Use Scenario: Freewheeling path across inductive loads (e.g., motor windings or relay coils) in half-bridge inverters. IC Role / Device Role / Timing Role: Provides low-loss current recirculation path during MOSFET off-time to suppress voltage spikes. Use Value: Fast turn-off prevents cross-conduction risk and limits dv/dt-induced gate ringing in adjacent switches. |
| AC–DC Adapter Secondary Rectifier | Industrial PLC Power Supply Input Stage |
Use Scenario: Output rectification in compact 12–24 V, 1 A wall adapters using quasi-resonant flyback topology. IC Role / Device Role / Timing Role: High-efficiency rectifier delivering stable DC after transformer isolation and filtering. Use Value: 100 V VRRM safely accommodates reflected transients up to 1.5× nominal output voltage. | Use Scenario: Input rectification stage in DIN-rail mounted 24 V DC power supplies for programmable logic controllers. IC Role / Device Role / Timing Role: Primary rectifier converting 100–240 V AC input to bulk DC bus prior to regulation. Use Value: 150 °C TJ max and 30 A IFSM ensure robustness against line surges and brownout recovery events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R01 | Same 1 A / 100 V rating; trr = 50 ns; VF = 1.15 V @ 1 A; TO-220AC package | Higher thermal mass but requires PCB footprint and heatsinking; not axial-leaded | Select when higher power dissipation or forced-air cooling is needed |
| ON Semiconductor MUR110 | 1 A / 100 V; trr = 50 ns; VF = 0.95 V @ 1 A; DO-41 package; no AEC-Q101 variant | Identical form factor and pinout; lacks automotive qualification option | Select for cost-sensitive industrial designs where AEC-Q101 is not required |
Compared with STTH1R01 and MUR110, the UF4002 offers identical ultrafast timing and axial DO-41 compatibility, while providing optional AEC-Q101 qualification-making it uniquely suitable for space-constrained automotive auxiliary power modules requiring qualification traceability.
Availability
UF4002 is available at Aetrix Electronics and suitable for DC–DC converter output rectification, switching inverter freewheeling, and industrial PLC power supply input stages requiring stable component supply, consistent parametric performance, and long-term manufacturability.
Supply support for UF4002 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global industrial, computing, and automotive markets since 1979.
The UF4002 belongs to TSC's UF400x ultrafast rectifier family, engineered specifically for high-efficiency, high-frequency power conversion in space- and thermally-constrained applications such as adapters, inverters, and automotive subsystems.
FAQ
What is the maximum repetitive peak reverse voltage (VRRM) of the UF4002?
The UF4002 has a VRRM of 100 V, meaning it can block up to 100 volts of reverse-biased voltage repeatedly without breakdown. This rating is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (P2104), and ensures safe operation in 24–48 V output SMPS designs where reflected transients may reach 1.2–1.5× nominal voltage. The UF4002 must not be used in circuits exceeding this limit.
Does the UF4002 have AEC-Q101 qualification?
The base UF4002 is not automatically AEC-Q101 qualified; however, the variant UF4002H is explicitly qualified per AEC-Q101. Per Taiwan Semiconductor's ordering information, the "H" suffix denotes automotive qualification. Standard UF4002 devices meet industrial reliability standards but require verification of the H-suffix marking or packaging code to confirm AEC-Q101 compliance for automotive use cases.
What is the forward voltage (VF) of the UF4002 at 1 A and 25°C?
The UF4002 exhibits a maximum forward voltage of 1.0 V at 1 A and 25°C, as specified in the Electrical Specifications table (TYP/ MAX column). This value is measured under pulsed conditions (PW = 0.3 ms) and reflects low conduction loss critical for efficiency in high-duty-cycle applications. At elevated temperatures (e.g., 125°C), VF decreases slightly due to semiconductor physics, but derating curves must be consulted for design margins.
How does the UF4002 compare to the UF4001 in terms of reverse voltage rating?
The UF4002 has a VRRM of 100 V, whereas the UF4001 is rated for 50 V. Both share identical current ratings (1 A), recovery time (≤50 ns), and package (DO-41), but differ only in blocking voltage capability. This makes the UF4002 appropriate for 48 V systems or designs requiring margin above 50 V, while the UF4001 suits 24 V or lower-voltage applications where cost optimization is prioritized.
What is the reverse recovery time (trr) specification for the UF4002?
The UF4002 has a maximum reverse recovery time (trr) of 50 ns, tested at IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultrafast value is confirmed in the Electrical Specifications table and applies to all UF4001–UF4004 variants. It directly enables high-frequency operation (>100 kHz) with minimal switching loss and reduced EMI generation in modern power converters.
UF4002 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 100 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 100 V
- Capacitance @ Vr, F:
- 17pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
UF4002 FAQ
1.How can I place an order for UF4002 through Aetrix?
Please submit a Request for Quotation (RFQ) for UF4002 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 UF4002 reliable?
The price and inventory of UF4002 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF4002 is usually 5 days.
3.What payment methods are accepted for UF4002?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF4002 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF4002?
UF4002 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF4002 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 UF4002?
For technical support, including UF4002 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF4002 requirements.
6.How does Aetrix verify that UF4002 is sourced from the original manufacturer or authorized distributors?
All UF4002 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 UF4002 meets industry standards.
7.What is the process for return or replacement of UF4002?
All UF4002 units undergo pre-shipment inspection (PSI). If there is an issue with UF4002, 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 UF4002 part is unused and in its original packaging.
Return procedure for UF4002:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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