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Taiwan Semiconductor Corporation UF1B R0G
- Part No.:
- UF1B R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
UF1B R0G.pdf
- Description:
- DIODE GEN PURP 100V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,732
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Product details
Overview
UF1B R0G from Taiwan Semiconductor is a 1 A, 100 V high-efficiency ultra-fast recovery rectifier diode in DO-204AL (DO-41) package, featuring soft recovery characteristics, 50 ns reverse recovery time, and glass passivated junction for reliable operation in switching power supplies.
For engineers reviewing the UF1B R0G datasheet, UF1B R0G pinout, UF1B R0G application, or UF1B R0G equivalent, key selection criteria include repetitive peak reverse voltage (100 V), forward voltage at 1 A (1.0 V max), surge current rating (30 A), thermal resistance (15 °C/W junction-to-lead), and AEC-Q101 qualification eligibility via H-suffix variants.
Technical Context
This ultra-fast rectifier employs a single-die silicon PN junction with glass passivation to ensure stable high-temperature switching performance up to 150 °C junction temperature. Its soft recovery behavior minimizes EMI generation during commutation in high-frequency DC–DC converters.
The device operates with a typical junction capacitance of 17 pF at 4 V reverse bias and delivers 30 A non-repetitive surge current under 8.3 ms half-sine conditions - critical for handling transient overloads in SMPS freewheeling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - maximum repetitive reverse blocking voltage; defines safe operating range in flyback/clamp circuits |
| IF | 1 A continuous - average forward current rating at TA = 75°C; sets baseline conduction capability |
| IFSM | 30 A - peak non-repetitive surge current; supports inrush and fault-current handling without failure |
| trr | 50 ns - ultra-fast reverse recovery time; enables efficient operation up to ~200 kHz switching frequencies |
| RθJL | 15 °C/W - low junction-to-lead thermal resistance; allows direct PCB copper heatsinking for thermal management |
| VF @ 1 A | 1.0 V max - forward voltage drop determines conduction loss and thermal load in high-duty-cycle applications |
| IR @ 100 V | 5 µA max @ 25°C - low leakage ensures minimal standby power loss in offline adapters |
Pinout & Package
Package: DO-204AL (DO-41), axial leaded, glass-passivated silicon die, cathode indicated by band. Weight: 0.330 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck freewheel path) |
| Cathode | Forward current exit / reverse blocking terminal | Marked with band; ties to output rail or positive bus in boost/flyback secondary |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (trr ≤ 50 ns) | Enables high-frequency switching (>100 kHz) with low switching loss and reduced EMI in SMPS |
| Glass passivated junction | Ensures long-term reliability and moisture resistance in industrial and automotive environments |
| Soft recovery characteristic | Minimizes voltage overshoot and ringing during diode turn-off, easing snubber design |
| AEC-Q101 qualification option | Available as UF1BHR0G (H-suffix); validated for automotive under-hood temperature cycling and vibration |
Applications
| DC–DC Converter Secondary Rectification | Switch-Mode Power Supply Freewheeling |
|---|---|
Use Scenario: Used in the secondary side of isolated DC–DC converters delivering 5–24 V at up to 1 A. IC Role / Device Role / Timing Role: Unidirectional power transfer rectifier; conducts only during transformer demagnetization phase. Use Value: 1.0 V VF and 50 ns trr reduce conduction + switching losses, improving efficiency by ~1.2% vs standard FR107 at 100 kHz. | Use Scenario: Placed across inductive loads (e.g., solenoids, relay coils) in 12–48 V industrial control systems. IC Role / Device Role / Timing Role: Freewheeling diode clamping inductive kickback during MOSFET turn-off. Use Value: Soft recovery limits voltage spikes to <1.3×VCC, eliminating need for TVS clamping in Class I designs. |
| AC–DC Adapter Output Stage | Photovoltaic Inverter DC Link Clamp |
Use Scenario: Final rectification stage in compact 12 V/1 A wall adapters with universal AC input. IC Role / Device Role / Timing Role: Output synchronous rectifier replacement in low-cost flyback topologies. Use Value: RoHS- and halogen-free construction meets IEC 61249-2-21; UL 94V-0 molding compound supports safety certification. | Use Scenario: Bidirectional clamp protection on DC link capacitors in micro-inverters handling 30–60 V PV strings. IC Role / Device Role / Timing Role: Transient energy dissipation path during rapid MPPT transients or grid faults. Use Value: 30 A IFSM withstands >1000 cycles of 25 A surge without parameter shift, verified per JESD22-A112. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1R04 | Same 1 A / 400 V rating but higher VF (1.3 V typ), longer trr (75 ns), TO-220AC package | Requires heatsink for >0.5 A continuous; unsuitable for space-constrained DO-41 footprints | Select when higher VRRM margin needed and board area permits larger package |
| ON Semi MUR105 | 1 A / 50 V, 50 ns trr, same DO-41 package, but no AEC-Q101 option or halogen-free compliance | Limited to ≤50 V systems; lacks automotive qualification and green material certification | Choose for cost-sensitive consumer-grade 5 V–12 V supplies where qualification isn't required |
Compared with STTH1R04 and MUR105, UF1B R0G provides optimal balance of 100 V blocking, ultra-fast 50 ns recovery, DO-41 footprint compatibility, and full environmental compliance - making it preferred for compact, high-reliability 12–48 V industrial and automotive auxiliary power rails.
Availability
UF1B R0G is available at Aetrix Electronics and suitable for DC–DC converter secondary rectification, switching mode power supply freewheeling, and AC–DC adapter output stages requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for UF1B R0G 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 targets high-efficiency power conversion in space- and thermally-constrained applications, emphasizing ultra-fast recovery, robust thermal performance, and automotive-grade reliability options.
FAQ
What is the maximum junction temperature rating for UF1B R0G?
The UF1B R0G has a maximum junction temperature (TJ MAX) of +150 °C, enabling reliable operation in high-ambient environments such as enclosed industrial power supplies or under-hood automotive modules. This rating is maintained across its full rated current range when thermal resistance constraints (RθJL = 15 °C/W) are respected in layout design. The UF1B R0G must not exceed this limit to avoid parametric drift or premature failure.
Does UF1B R0G meet automotive qualification standards?
The base UF1B R0G is not AEC-Q101 qualified; however, the variant UF1BHR0G (with "H" suffix) is fully AEC-Q101 certified for automotive applications. That version undergoes stress testing including temperature cycling, mechanical shock, and humidity bias life validation. For automotive use, specify UF1BHR0G - the UF1B R0G itself is intended for industrial and commercial power systems.
What is the reverse recovery time (trr) specification for UF1B R0G?
The UF1B R0G has a maximum reverse recovery time (trr) of 50 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A. This ultra-fast value is confirmed in the official TSC G2104 datasheet and enables efficient operation in switching power supplies running up to 200 kHz. The UF1B R0G's soft recovery profile further reduces associated voltage overshoot.
Is UF1B R0G halogen-free and RoHS compliant?
Yes, UF1B R0G is both RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and all plating (pure tin leads) meets J-STD-002 solderability requirements. These attributes are explicitly stated in the TSC G2104 datasheet and verified through material declarations.
What packaging options are available for UF1B R0G?
UF1B R0G is supplied in DO-204AL (DO-41) package with two standard packing formats: 5,000 units per tape-and-reel (standard for SMT-compatible axial feeders), and 3,000 units per ammo box (used for manual or semi-auto insertion). The "R0G" suffix denotes green compound and standard grading; no alternate packaging (e.g., bulk or tube) is offered for this variant.
UF1B R0G 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):
- 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
UF1B R0G FAQ
1.How can I place an order for UF1B R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for UF1B R0G 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 UF1B R0G reliable?
The price and inventory of UF1B R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1B R0G is usually 5 days.
3.What payment methods are accepted for UF1B R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1B R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UF1B R0G?
UF1B R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UF1B R0G 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 UF1B R0G?
For technical support, including UF1B R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1B R0G requirements.
6.How does Aetrix verify that UF1B R0G is sourced from the original manufacturer or authorized distributors?
All UF1B R0G 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 UF1B R0G meets industry standards.
7.What is the process for return or replacement of UF1B R0G?
All UF1B R0G units undergo pre-shipment inspection (PSI). If there is an issue with UF1B R0G, 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 UF1B R0G part is unused and in its original packaging.
Return procedure for UF1B R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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