My Inquiry
My Account
Taiwan Semiconductor Corporation UF4001
- Part No.:
- UF4001
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF4001.pdf
- Description:
- DIODE GEN PURP 50V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,853
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UF4001 from Taiwan Semiconductor is a 1A, 50V 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 capability - used in DC-DC converters and switching-mode power supplies for high-efficiency freewheeling.
For engineers reviewing the UF4001 datasheet, UF4001 pinout, UF4001 application, or UF4001 equivalent, key selection criteria include repetitive peak reverse voltage (50 V), thermal resistance (15 °C/W junction-to-lead), AEC-Q101 qualification availability, RoHS/halogen-free compliance, and DO-41 mechanical compatibility with standard through-hole PCB layouts.
Technical Context
The UF4001 employs a glass-passivated single-die silicon junction optimized for high-temperature switching and low conduction loss. Its 50 ns trr enables operation in high-frequency SMPS topologies up to several hundred kHz without excessive switching loss.
Designed for unidirectional current flow, it supports continuous forward current up to 1 A at 150 °C junction temperature, with reverse leakage limited to 5 µA at 25 °C and 150 µA at 125 °C under rated 50 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 50 V - maximum repetitive reverse voltage before breakdown; sets safe operating limit in clamp/freewheeling circuits |
| IF | 1 A - average forward current rating at TA = 75 °C; defines continuous conduction capacity |
| trr | 50 ns - measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A; enables efficient high-frequency switching |
| VF | 1.0 V - forward voltage drop at IF = 1 A, TJ = 25 °C; determines conduction loss and thermal load |
| IFSM | 30 A - non-repetitive surge current (8.3 ms half-sine); withstands inrush and transient overloads |
| RθJL | 15 °C/W - junction-to-lead thermal resistance; critical for heatsinking design in high-power density layouts |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, glass-passivated, cathode indicated by band. Weight: 0.330 g. RoHS and halogen-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., switch node in buck converter freewheel path) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; tied to output rail or ground return; blocks 50 V reverse during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Ultrafast recovery (50 ns) | Reduces switching losses in 100–500 kHz SMPS designs, improving efficiency over standard rectifiers |
| Glass-passivated junction | Enhances moisture resistance and long-term reliability in humid or thermally cycled environments |
| Low VF (1.0 V @ 1 A) | Lowers I²R conduction loss, reducing thermal stress and enabling smaller heatsinks or higher ambient operation |
| AEC-Q101 qualified option | Available as UF4001H for automotive-grade applications requiring validated stress testing and traceability |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Output rectification in isolated flyback or forward converters operating at 200–300 kHz. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time to maintain inductor current continuity. Use Value: 50 ns trr minimizes reverse recovery charge (Qrr), reducing voltage spikes and EMI generation at the switching node. | Use Scenario: Bridge leg anti-parallel diode in single-phase H-bridge inverters for motor drives. IC Role / Device Role / Timing Role: Provides bidirectional current path during PWM dead-time and regenerative braking. Use Value: 30 A IFSM handles motor startup surges; 150 °C TJ max supports operation in enclosed industrial enclosures. |
| Freewheeling Circuits | AC-DC Adapters |
Use Scenario: Inductive load suppression in relay drivers and solenoid controls. IC Role / Device Role / Timing Role: Clamps inductive kickback voltage to safe levels during coil de-energization. Use Value: 50 V VRRM provides sufficient margin above typical 24 V or 48 V bus voltages; 1.0 V VF limits clamping energy dissipation. | Use Scenario: Secondary-side rectification in compact wall adapters (5–24 W). IC Role / Device Role / Timing Role: Converts high-frequency transformer output to regulated DC output. Use Value: DO-41 package enables manual or automated through-hole assembly; RoHS/halogen-free compliance meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultrafast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R06 | 600 V VRRM, 1.15 V VF @ 1 A, 50 ns trr, DO-41 package | Higher voltage rating suits 400 V AC input designs; not suitable for 50 V systems due to higher VF and cost | Select when system requires >100 V reverse margin but same footprint and speed |
| 1N4933 | 100 V VRRM, 1.2 V VF @ 1 A, 200 ns trr, DO-41 package | Slower recovery increases switching loss above 50 kHz; acceptable only in low-frequency (<30 kHz) linear or quasi-resonant supplies | Choose only if cost sensitivity outweighs efficiency needs and VRRM margin >50 V is required |
Compared with STTH1R06 and 1N4933, the UF4001 delivers optimal balance of low VF, fast trr, and precise 50 V rating for cost-sensitive, high-frequency 24–48 V DC-DC stages - avoiding overdesign while ensuring robustness against line transients.
Availability
UF4001 is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling circuits requiring stable component supply, consistent DO-41 mechanical fit, and verified ultrafast recovery performance.
Supply support for UF4001 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, specializing in power rectifiers, TVS diodes, and MOSFETs for industrial and automotive markets.
The UF4001 belongs to TSC's UF400x ultrafast rectifier family, engineered specifically for high-efficiency, high-frequency power conversion where low VF and sub-75 ns trr are essential - targeting SMPS, adapters, and motor control applications.
FAQ
What is the maximum junction temperature rating for UF4001?
The UF4001 has a maximum junction temperature (TJ MAX) of +150 °C, allowing reliable operation in high-ambient environments such as enclosed power supplies or industrial motor drives. This rating is maintained under continuous 1 A forward current with proper thermal management - including attention to its 15 °C/W junction-to-lead thermal resistance. The UF4001 datasheet specifies derating curves confirming usable current down to 0 A at 150 °C case temperature.
Is UF4001 RoHS and halogen-free compliant?
Yes, the UF4001 is RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its pure tin-plated leads are solderable per J-STD-002. These compliance attributes are confirmed in the official Taiwan Semiconductor P2104 datasheet revision and apply to all standard UF4001 ordering codes (e.g., UF4001, UF4001H).
Does UF4001 have AEC-Q101 qualification?
The UF4001 is available in an AEC-Q101 qualified version designated UF4001H. Standard UF4001 is not AEC-Q101 qualified; only the "H" suffix variant undergoes automotive-grade stress testing including temperature cycling, humidity bias, and high-temperature operating life. Designers requiring automotive qualification must specify UF4001H explicitly in procurement and layout documentation.
What is the reverse recovery time (trr) of UF4001 and how is it tested?
The UF4001 has a maximum reverse recovery time (trr) of 50 ns, measured under standardized conditions: IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A, per JEDEC test method. This value is confirmed in the Electrical Specifications table of the Taiwan Semiconductor UF4001 datasheet (P2104). The test circuit and waveform are detailed in Figure 6 of the same document.
Can UF4001 replace UF4002 or UF4003 in a 50 V circuit?
Yes, UF4001 is the correct choice for 50 V-rated circuits, whereas UF4002 (100 V) and UF4003 (200 V) offer higher reverse voltage margins at the cost of slightly higher VF (1.0 V vs. 1.05–1.1 V) and identical trr. Substituting UF4002/UF4003 in a 50 V design is electrically safe but unnecessarily increases conduction loss and cost; UF4001 provides optimal VF/trr trade-off at its rated voltage.
UF4001 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):
- 50 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 @ 50 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
UF4001 FAQ
1.How can I place an order for UF4001 through Aetrix?
Please submit a Request for Quotation (RFQ) for UF4001 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 UF4001 reliable?
The price and inventory of UF4001 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF4001 is usually 5 days.
3.What payment methods are accepted for UF4001?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF4001 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF4001?
UF4001 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF4001 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 UF4001?
For technical support, including UF4001 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF4001 requirements.
6.How does Aetrix verify that UF4001 is sourced from the original manufacturer or authorized distributors?
All UF4001 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 UF4001 meets industry standards.
7.What is the process for return or replacement of UF4001?
All UF4001 units undergo pre-shipment inspection (PSI). If there is an issue with UF4001, 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 UF4001 part is unused and in its original packaging.
Return procedure for UF4001:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UF4001 Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
