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Taiwan Semiconductor Corporation UF1AHA0G
- Part No.:
- UF1AHA0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF1AHA0G.pdf
- Description:
- DIODE GEN PURP 50V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,124
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Product details
Overview
UF1AHA0G from Taiwan Semiconductor is a 1 A, 50 V high-efficiency glass-passivated fast recovery rectifier in DO-204AL (DO-41) package, featuring soft recovery (trr ≤ 50 ns), 1.0 V max forward voltage at 1 A/25°C, and AEC-Q101 qualification for automotive-grade reliability - used in DC-DC converter freewheeling paths.
For engineers reviewing the UF1AHA0G datasheet, UF1AHA0G pinout, UF1AHA0G application, or UF1AHA0G equivalent, key selection criteria include repetitive peak reverse voltage (50 V), surge current rating (30 A), junction-to-lead thermal resistance (15 °C/W), RoHS/halogen-free compliance, and DO-41 mechanical compatibility.
Technical Context
This discrete rectifier employs a single-die silicon PN junction with glass passivation for enhanced moisture and thermal stability. Its soft recovery behavior minimizes EMI in high-frequency switching topologies, and the 150 °C maximum junction temperature supports operation in constrained thermal environments.
The device is rated for 1 A average forward current with 30 A non-repetitive surge capability (8.3 ms half-sine), and exhibits low junction capacitance (17 pF @ 1 MHz, 4 V) - critical for minimizing switching losses in flyback and boost converters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF (Avg) | 1 A - continuous forward current handling capacity under standard heatsinking conditions |
| VRRM | 50 V - maximum repetitive reverse voltage before breakdown; defines safe blocking range in DC-DC output stages |
| VF (max) | 1.0 V @ 1 A, 25°C - directly impacts conduction loss and thermal rise in high-duty-cycle applications |
| trr (max) | 50 ns - enables efficient operation up to ~2 MHz switching frequencies with reduced switching loss and ringing |
| RθJL | 15 °C/W - enables direct PCB copper pour thermal coupling for reliable 1 A operation without external heatsink |
| IR (max) | 5 µA @ 25°C - ensures minimal leakage in high-impedance hold-up or sensing circuits |
| TJ max | +150 °C - supports under-hood automotive environments and sealed industrial enclosures |
Pinout & Package
Package: DO-204AL (DO-41), axial lead, glass-passivated silicon die, cathode indicated by band. Weight: 0.330 g. Leads are pure tin-plated, J-STD-002 solderable, JESD201 Class 2 whisker compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); must withstand 30 A surge transients |
| Cathode | Forward current exit / reverse voltage blocking terminal | Connected to output rail; polarity band identifies this terminal; handles full VRRM during off-state |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements (HTOL, TC, HTRB, etc.) |
| Glass passivated junction | Prevents moisture ingress and metallization corrosion, extending lifetime in humid or condensing environments |
| Soft recovery characteristic | Reduces voltage overshoot and EMI generation during diode turn-off in hard-switched SMPS |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing and end-of-life processing |
| DO-41 mechanical standardization | Enables drop-in replacement across legacy designs and compatibility with automated axial insertion equipment |
Applications
| DC-DC Converter Output Rectification | Automotive Body Control Module (BCM) Power Supply |
|---|---|
Use Scenario: Used as secondary-side rectifier in isolated flyback or forward converters delivering 3.3–12 V to microcontrollers and sensors. IC Role / Device Role / Timing Role: Unidirectional current valve enabling energy transfer from transformer secondary to output capacitor. Use Value: 1.0 V VF and 50 ns trr minimize conduction + switching losses, improving efficiency >92% at 1 A load. | Use Scenario: Freewheeling diode across relay coils and motor drivers in 12 V automotive BCMs. IC Role / Device Role / Timing Role: Clamps inductive kickback voltage to protect MOSFET switches during turn-off. Use Value: 30 A IFSM rating safely absorbs 25 ms relay coil decay energy without failure. |
| Industrial AC-DC Adapter Secondary Side | LED Driver Constant-Current Loop |
Use Scenario: Output rectifier in compact 5–24 V, 1 A offline adapters powering PLC I/O modules. IC Role / Device Role / Timing Role: Converts transformer AC output to regulated DC; operates continuously at 1 A ambient temperatures up to 70°C. Use Value: RθJL = 15 °C/W allows direct PCB copper thermal path, eliminating need for thermal vias or heatsinks. | Use Scenario: Reverse-blocking element in constant-current LED string drivers using buck topology. IC Role / Device Role / Timing Role: Blocks reverse voltage during PWM off-phase while conducting forward current during on-phase. Use Value: 5 µA IR at 25°C prevents LED dimming drift in precision current-regulated strings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MUR105G | Same DO-41 package, 1 A/50 V, but trr = 75 ns (vs. UF1AHA0G's 50 ns); VF = 1.15 V max | Slightly higher switching loss in >500 kHz designs; acceptable for <300 kHz flyback converters | Select UF1AHA0G where EMI reduction or higher frequency operation is required |
| Vishay VS-1EH05-M3/54 | DO-41, 1 A/50 V, AEC-Q101 qualified, trr = 50 ns, but VF = 1.1 V max and RθJA = 65 °C/W (vs. 60 °C/W) | Marginally higher conduction loss and slightly worse thermal dissipation in confined layouts | UF1AHA0G preferred for thermally dense PCBs due to lower VF and better RθJL |
Compared with MUR105G and VS-1EH05-M3/54, UF1AHA0G delivers the lowest forward voltage (1.0 V max) and tightest reverse recovery (50 ns), making it optimal for high-efficiency, high-frequency, and automotive-qualified 1 A rectification where thermal headroom and EMI control are critical.
Availability
UF1AHA0G is available at Aetrix Electronics and suitable for DC-DC converter design, automotive body electronics, and industrial power adapter development requiring stable component supply and long-term manufacturability.
Supply support for UF1AHA0G 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 automotive, industrial, and consumer markets since 1979.
The UF1A–UF1M series was developed specifically for high-reliability, high-efficiency rectification in automotive power systems and industrial switching supplies - emphasizing AEC-Q101 qualification, soft recovery, and thermal robustness in standard DO-41 packaging.
FAQ
What is the maximum junction temperature rating for UF1AHA0G?
The UF1AHA0G has a maximum junction temperature (TJ max) of +150 °C, validated per JEDEC standards. This rating allows reliable operation in under-hood automotive environments and sealed industrial enclosures. Derating curves in the UF1A–UF1M datasheet show usable current drops linearly above 75 °C ambient, and the device maintains full 1 A rating up to 75 °C with adequate PCB copper area. The UF1AHA0G achieves this via glass passivation and optimized thermal resistance (RθJL = 15 °C/W).
Is UF1AHA0G AEC-Q101 qualified, and what does that cover?
Yes, UF1AHA0G is AEC-Q101 qualified - confirmed by the "H" suffix in its ordering code and TSC's G2104 datasheet revision. This qualification covers stress tests including high-temperature operating life (HTOL), temperature cycling (TC), highly accelerated temperature-humidity stress (HAST), and unbiased highly accelerated stress (uHAST). It certifies suitability for automotive powertrain, chassis, and body electronics applications where reliability under thermal, mechanical, and environmental stress is mandatory. The UF1AHA0G meets all requirements without derating.
What is the forward voltage specification for UF1AHA0G at 1 A and 125°C?
The UF1AHA0G datasheet specifies VF ≤ 1.0 V at IF = 1 A and TJ = 25°C. At TJ = 125°C, VF increases to approximately 0.85 V due to negative temperature coefficient of silicon PN junctions - verified by Fig.4 (Typical Forward Characteristics) in the UF1A–UF1M datasheet. This lower VF at elevated temperature improves thermal stability in high-ambient applications. No maximum VF is specified at 125°C, but measured typicals remain below 0.9 V, supporting consistent efficiency across automotive temperature ranges.
Does UF1AHA0G have a defined reverse recovery time, and how is it measured?
Yes, UF1AHA0G has a maximum reverse recovery time (trr) of 50 ns, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A per JEDEC standard JESD282B. This test condition reflects real-world switching behavior in flyback and boost converters. The soft recovery waveform - shown in Fig.6 of the datasheet - confirms minimal current tail and low di/dt-induced voltage overshoot. This trr value enables clean switching up to 2 MHz and reduces EMI filter burden compared to standard recovery rectifiers.
What packaging and reel options are available for UF1AHA0G?
UF1AHA0G is supplied in 3,000-piece ammo boxes (indicated by "A0G" suffix), per the ordering code structure in the UF1A–UF1M datasheet. It uses DO-204AL (DO-41) axial package with pure tin-plated leads, J-STD-002 solderable, and complies with JESD201 Class 2 whisker testing. Tape-and-reel (5,000 pcs) is available under part number UF1AHA, not UF1AHA0G. Ammo box packaging supports manual and semi-automated assembly, and the lead finish ensures compatibility with both SnPb and lead-free reflow profiles.
UF1AHA0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Box (TB)
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 150°C
UF1AHA0G FAQ
1.How can I place an order for UF1AHA0G through Aetrix?
Please submit a Request for Quotation (RFQ) for UF1AHA0G 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 UF1AHA0G reliable?
The price and inventory of UF1AHA0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1AHA0G is usually 5 days.
3.What payment methods are accepted for UF1AHA0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1AHA0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF1AHA0G?
UF1AHA0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF1AHA0G 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 UF1AHA0G?
For technical support, including UF1AHA0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1AHA0G requirements.
6.How does Aetrix verify that UF1AHA0G is sourced from the original manufacturer or authorized distributors?
All UF1AHA0G 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 UF1AHA0G meets industry standards.
7.What is the process for return or replacement of UF1AHA0G?
All UF1AHA0G units undergo pre-shipment inspection (PSI). If there is an issue with UF1AHA0G, 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 UF1AHA0G part is unused and in its original packaging.
Return procedure for UF1AHA0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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