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Taiwan Semiconductor Corporation UG4D
- Part No.:
- UG4D
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
UG4D.pdf
- Description:
- 20NS, 4A, 200V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:2,480
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Product details
Overview
UG4D from Taiwan Semiconductor is a 4A, 200V ultra-fast recovery rectifier diode in DO-201AD package, designed for high-frequency switching power supplies. It delivers 20 ns reverse recovery time, 0.95 V forward voltage at 4 A/25°C, and 150 A surge capability - enabling efficient freewheeling and DC-DC conversion in compact industrial converters.
For engineers reviewing the UG4D datasheet, UG4D pinout, UG4D application, or UG4D equivalent, key selection considerations include its 200 V repetitive peak reverse voltage, 150°C maximum junction temperature, ultra-fast trr performance, RoHS/halogen-free compliance, and DO-201AD mechanical compatibility with standard through-hole reflow and wave soldering processes.
Technical Context
The UG4D employs a glass-passivated single-die silicon junction optimized for high-temperature switching stability and low conduction loss. Its 20 ns reverse recovery time (measured at IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A) supports operation in 100–500 kHz SMPS topologies without excessive switching loss.
Thermally, the device features a junction-to-ambient thermal resistance of 25°C/W in free-air conditions and operates across –55°C to +150°C junction range. The pure tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Withstands up to 200 V repetitive reverse voltage without breakdown in DC-DC or inverter freewheeling paths |
| IF | 4 A continuous - Sustains 4 A average forward current at TA = 75°C with derating per curve Fig.1 |
| trr | 20 ns - Enables high-frequency switching (>200 kHz) with minimal reverse recovery loss in synchronous rectifier replacement roles |
| VF @ 4A/25°C | 0.95 V max - Limits conduction loss to ≤3.8 W at full load, critical for thermal management in enclosed converters |
| IFSM | 150 A - Survives 8.3 ms half-sine surge events common during input line transients or startup in SMPS |
| TJ max | +150°C - Supports operation in sealed industrial enclosures or high-ambient environments without forced cooling |
| RθJA | 25°C/W - Predicts ~100°C junction rise above ambient at 4 A continuous in standard PCB mount, guiding heatsink decisions |
Pinout & Package
Package: DO-201AD - axial-leaded, molded plastic case with cathode band polarity marking; UL 94V-0 rated compound; 1.20 g typical weight; lead finish: pure tin, J-STD-002 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter freewheel path) |
| Cathode (Lead 2, banded end) | Forward current exit / reverse blocking terminal | Connected to output rail or higher-potential node; blocks 200 V reverse during off-state |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term reliability under thermal cycling and humidity exposure in industrial-grade power modules |
| Ultra-fast 20 ns trr | Reduces switching loss by >40% vs. standard fast recovery diodes (e.g., UF4007) in 200–300 kHz flyback designs |
| 150 A IFSM rating | Eliminates need for parallel diodes in 48 V input DC-DC converters subject to cold-start surges |
| RoHS & halogen-free | Meets IEC 61249-2-21 and global environmental compliance mandates for industrial and telecom equipment |
Applications
| DC-DC Converters | Switching Inverters |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24–48 V input DC-DC modules delivering 5–12 V at up to 4 A. IC Role / Device Role / Timing Role: Ultra-fast freewheeling diode replacing slower alternatives to minimize reverse recovery loss during MOSFET turn-on. Use Value: Enables >92% efficiency at 250 kHz switching frequency while maintaining <85°C junction temperature on 2-layer PCB. | Use Scenario: Output stage anti-parallel clamping in 3-phase motor drive inverters with IGBTs. IC Role / Device Role / Timing Role: Freewheeling path for inductive load current during PWM dead-time intervals. Use Value: 20 ns trr prevents shoot-through risk and reduces EMI generation compared to 75 ns diodes in 10–20 kHz PWM systems. |
| SMPS Power Supplies | Industrial UPS Systems |
Use Scenario: Input bridge rectification in compact 100–200 W offline flyback or forward converters. IC Role / Device Role / Timing Role: High-reliability AC input rectifier handling 265 VAC peaks with surge margin. Use Value: 200 V VRRM and 150 A IFSM support universal AC input (85–265 VAC) with robustness against line spikes. | Use Scenario: Battery charging and backup power path isolation in 48 V telecom UPS units. IC Role / Device Role / Timing Role: Reverse-polarity and backfeed protection diode in battery interface circuitry. Use Value: 150°C TJ max and –55°C TSTG enable deployment in uncontrolled-temperature base station cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4R02 | 4 A / 200 V, trr = 35 ns, VF = 0.97 V, DO-201AD, same TJ max | Higher trr increases switching loss in >150 kHz designs; suitable for cost-sensitive 50–100 kHz SMPS | Select STTH4R02 only when trr >25 ns is acceptable and thermal margin exceeds 15°C |
| ES4D | 4 A / 200 V, trr = 25 ns, VF = 0.92 V, DO-214AA (SMA), 125°C TJ max | Surface-mount package requires PCB redesign; lower max junction temp limits high-ambient use | Choose ES4D only for new SMT designs where board space is constrained and ambient stays below 75°C |
Compared with STTH4R02 and ES4D, the UG4D uniquely balances 20 ns trr, 150°C junction rating, and through-hole DO-201AD compatibility - making it optimal for legacy-compatible, thermally demanding, high-frequency industrial power supplies where reliability and serviceability are prioritized over footprint reduction.
Availability
UG4D is available at Aetrix Electronics and suitable for DC-DC converters, switching inverters, and industrial UPS systems requiring stable component supply, long-lifecycle availability, and traceable sourcing for production programs.
Supply support for UG4D 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 consumer markets since 1979.
The UG4D belongs to TSC's Ultra-Fast Rectifier family, engineered specifically for high-efficiency, high-reliability switching power conversion where low trr, high surge tolerance, and extended temperature operation are mandatory.
FAQ
What is the maximum junction temperature rating for the UG4D?
The UG4D has a maximum junction temperature (TJ max) of +150°C, verified per absolute maximum ratings table. This allows sustained operation in high-ambient industrial environments - such as enclosed power supplies or motor drives - without derating below 4 A until ambient exceeds 75°C, assuming standard DO-201AD mounting on 2-layer FR4.
Does the UG4D support lead-free soldering processes?
Yes, the UG4D features pure tin-plated leads fully compliant with J-STD-002 solderability standards and qualified for both lead-free reflow (peak 260°C) and wave soldering. Its DO-201AD package withstands multiple thermal cycles without delamination or whisker growth (JESD201 Class 2 certified).
What is the reverse recovery time (trr) test condition for the UG4D?
The UG4D reverse recovery time is specified as 20 ns maximum under the exact test condition: IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A, per Figure 6 test circuit diagram in the official TSC datasheet revision B2201. This reflects real-world behavior in hard-switched freewheeling applications.
Is the UG4D halogen-free and RoHS compliant?
Yes, the UG4D is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound contains no brominated flame retardants or chlorine-based additives, and the device carries full material declarations supporting WEEE and REACH compliance for global industrial equipment certification.
Can the UG4D replace the UF4007 in existing designs?
The UG4D can directly replace the UF4007 in most through-hole layouts due to identical DO-201AD package and pinout, but offers superior performance: 20 ns vs. 75 ns trr and 150°C vs. 125°C TJ max. No PCB changes are needed, though thermal design margin improves significantly - especially in high-frequency or high-ambient applications where the UF4007 would exceed safe operating area.
UG4D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-201AD, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 200 V
- Current - Average Rectified (Io):
- 4A
- Voltage - Forward (Vf) (Max) @ If:
- 950 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 20 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 200 V
- Capacitance @ Vr, F:
- 35pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
- Operating Temperature - Junction:
- -55°C ~ 150°C
UG4D FAQ
1.How can I place an order for UG4D through Aetrix?
Please submit a Request for Quotation (RFQ) for UG4D 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 UG4D reliable?
The price and inventory of UG4D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UG4D is usually 5 days.
3.What payment methods are accepted for UG4D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UG4D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UG4D?
UG4D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UG4D 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 UG4D?
For technical support, including UG4D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UG4D requirements.
6.How does Aetrix verify that UG4D is sourced from the original manufacturer or authorized distributors?
All UG4D 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 UG4D meets industry standards.
7.What is the process for return or replacement of UG4D?
All UG4D units undergo pre-shipment inspection (PSI). If there is an issue with UG4D, 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 UG4D part is unused and in its original packaging.
Return procedure for UG4D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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