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Taiwan Semiconductor Corporation UF1AHR0G
- Part No.:
- UF1AHR0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF1AHR0G.pdf
- Description:
- DIODE GEN PURP 50V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,238
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Product details
Overview
UF1AHR0G from Taiwan Semiconductor is a 50 V, 1 A glass-passivated high-efficiency rectifier diode in DO-204AL (DO-41) package, featuring 30 A surge rating, 150 °C max junction temperature, and soft recovery with 50 ns reverse recovery time - used in DC-DC converters and freewheeling paths.
For engineers reviewing the UF1AHR0G datasheet, UF1AHR0G pinout, UF1AHR0G application, or UF1AHR0G equivalent, key selection criteria include repetitive peak reverse voltage (50 V), forward voltage at 1 A (≤1.0 V), thermal resistance (15 °C/W junction-to-lead), and AEC-Q101 qualification status.
Technical Context
This single-die standard recovery rectifier operates with a maximum junction temperature of 150 °C and exhibits soft reverse recovery behavior critical for reducing EMI in switching power supplies. Its 50 ns trr (IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A) and low 17 pF junction capacitance at 1 MHz / 4 V support high-frequency operation up to several hundred kHz.
The device uses pure tin-plated leads compliant with J-STD-002 solderability and meets JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band on the DO-204AL molded body, and the compound satisfies UL 94V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Repetitive Peak Reverse Voltage (VRRM) | 50 V - defines maximum DC or peak AC reverse voltage the diode blocks without breakdown |
| Forward Current (IF) | 1 A continuous - maximum average forward current under specified thermal conditions |
| Surge Peak Forward Current (IFSM) | 30 A (8.3 ms half-sine) - supports brief inrush or transient overload without failure |
| Reverse Recovery Time (trr) | 50 ns - enables efficient operation in 100–500 kHz SMPS with reduced switching loss and EMI |
| Junction-to-Lead Thermal Resistance (RθJL) | 15 °C/W - allows direct heat transfer to PCB copper or heatsink via lead frame for thermal management |
| Forward Voltage (VF) | ≤1.0 V at IF = 1 A, TJ = 25°C - minimizes conduction loss in low-voltage, high-current rectification |
| Junction Capacitance (CJ) | 17 pF at 1 MHz, VR = 4 V - limits capacitive coupling noise in high-speed switching nodes |
Pinout & Package
Package: DO-204AL (DO-41), axial-leaded, epoxy-molded case with cathode band marking. Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., switch node or ground return) in freewheeling path |
| Cathode | Current exit terminal during forward conduction; polarity-marked band | Connected to higher-potential rail (e.g., output capacitor positive or inductor output) in boost/flyback topologies |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Enhances long-term reliability and moisture resistance in humid or automotive under-hood environments |
| Soft recovery characteristics | Reduces voltage overshoot and ringing during turn-off, lowering EMI filter component count |
| AEC-Q101 qualified version available | Validated for automotive power electronics requiring stress-tested reliability (e.g., body control modules) |
| UL 94V-0 molding compound | Meets flame-retardancy requirements for industrial and consumer end-equipment safety certifications |
Applications
| DC-DC Converter | Switching Inverter |
|---|---|
Use Scenario: Secondary-side rectification in isolated 12 V → 5 V/3.3 V flyback converters for industrial PLCs. IC Role / Device Role / Timing Role: Power rectifier converting high-frequency transformer output to regulated DC. Use Value: Low VF (≤1.0 V) reduces conduction loss; soft recovery minimizes snubber losses and EMI filtering cost. | Use Scenario: Freewheeling path in H-bridge motor drive inverters for HVAC blowers. IC Role / Device Role / Timing Role: Unidirectional current path during inductive energy recirculation. Use Value: 30 A IFSM handles motor startup surges; 150 °C TJ rating ensures operation in enclosed, thermally constrained enclosures. |
| Freewheeling Diode | AC-DC Adapter |
Use Scenario: Inductor flyback path in buck regulators powering FPGA core rails. IC Role / Device Role / Timing Role: Provides low-impedance return path for inductor current when main switch turns off. Use Value: 50 ns trr enables clean current commutation at 300 kHz switching, avoiding cross-conduction risk. | Use Scenario: Output rectification in compact 5 W wall adapters for IoT sensors. IC Role / Device Role / Timing Role: Converts high-frequency transformer secondary AC to DC output. Use Value: DO-41 package enables manual or wave-solder assembly; RoHS/halogen-free compliance meets global market access requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 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 | Higher voltage rating; less suitable for ≤100 V systems due to higher VF | Select when system requires >100 V blocking but same footprint and thermal profile |
| 1N4001G | 50 V VRRM, 1.1 V VF @ 1 A, 30 µs trr, DO-41 | Standard recovery (not soft); unsuitable for >20 kHz switching | Acceptable only in low-frequency linear supplies or non-critical freewheeling where EMI is not constrained |
Compared with STTH1R06 and 1N4001G, UF1AHR0G delivers optimized trade-offs for 50 V, high-frequency SMPS: lowest VF in its voltage class, soft recovery for EMI-sensitive designs, and AEC-Q101 availability - making it preferred over legacy standards and over-specified HV alternatives.
Availability
UF1AHR0G is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and freewheeling applications requiring stable component supply, automotive-grade reliability options, and RoHS/halogen-free compliance.
Supply support for UF1AHR0G 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 industrial, computing, and automotive markets since 1979.
The UF1x series was designed specifically for high-efficiency, high-reliability rectification in space-constrained switching power supplies - emphasizing soft recovery, thermal robustness, and qualification-ready variants for automotive subsystems.
FAQ
What is the maximum junction temperature rating for UF1AHR0G?
The UF1AHR0G has a maximum junction temperature (TJ) rating of +150 °C, verified per absolute maximum ratings in the official TSC datasheet (Version G2104). This allows reliable operation in thermally demanding environments such as enclosed power supplies or under-hood automotive modules when mounted with adequate copper pour or heatsinking.
Is UF1AHR0G AEC-Q101 qualified?
The UF1AHR0G part number itself is not AEC-Q101 qualified; however, the UF1AHR0G belongs to the UF1x family where AEC-Q101 versions are explicitly offered (e.g., UF1AH - "H" suffix denotes qualification). Customers requiring automotive qualification should select the "H" variant, not UF1AHR0G.
What does the "R0G" suffix mean in UF1AHR0G?
In UF1AHR0G, "R0G" indicates tape-and-reel packaging (R0 = reel, G = green compound per TSC marking convention). The base device is UF1A (50 V, 1 A), and "R0G" confirms DO-204AL packaging in 5,000-unit tape-and-reel format - consistent with TSC's ordering code structure defined in the datasheet.
What is the typical forward voltage of UF1AHR0G at 1 A and 25°C?
The typical forward voltage (VF) of UF1AHR0G is ≤1.0 V at IF = 1 A and TJ = 25°C, as specified in the Electrical Specifications table of the TSC UF1x datasheet (Version G2104). This value is measured under pulse conditions (PW = 0.3 ms) and represents worst-case conduction loss for thermal design.
Does UF1AHR0G have soft recovery characteristics?
Yes, UF1AHR0G exhibits soft recovery characteristics, confirmed in the Features section of the TSC datasheet. Its reverse recovery time is rated at 50 ns (max) under standardized test conditions (IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A), enabling low-noise commutation essential for EMI-sensitive switching power supplies.
UF1AHR0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
UF1AHR0G FAQ
1.How can I place an order for UF1AHR0G through Aetrix?
Please submit a Request for Quotation (RFQ) for UF1AHR0G 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 UF1AHR0G reliable?
The price and inventory of UF1AHR0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1AHR0G is usually 5 days.
3.What payment methods are accepted for UF1AHR0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1AHR0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF1AHR0G?
UF1AHR0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF1AHR0G 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 UF1AHR0G?
For technical support, including UF1AHR0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1AHR0G requirements.
6.How does Aetrix verify that UF1AHR0G is sourced from the original manufacturer or authorized distributors?
All UF1AHR0G 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 UF1AHR0G meets industry standards.
7.What is the process for return or replacement of UF1AHR0G?
All UF1AHR0G units undergo pre-shipment inspection (PSI). If there is an issue with UF1AHR0G, 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 UF1AHR0G part is unused and in its original packaging.
Return procedure for UF1AHR0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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