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Taiwan Semiconductor Corporation PUAD4D
- Part No.:
- PUAD4D
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
PUAD4D.pdf
- Description:
- 25NS, 4A, 200V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:4,480
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Product details
Overview
PUAD4D from Taiwan Semiconductor is a 200V, 4A ultra-fast surface-mount rectifier in ThinDPAK package, featuring 25 ns reverse recovery time, 0.92 V max forward voltage at 4A/25°C, and 130 A surge current capability-designed for high-frequency snubber and DC/DC converter applications.
For engineers reviewing the PUAD4D datasheet, PUAD4D pinout, PUAD4D application, or PUAD4D equivalent, key selection criteria include its 200V repetitive peak reverse voltage, low RθJC of 2.0°C/W, ultra-fast trr ≤25 ns, and compatibility with automated SMT placement on thermally enhanced PCBs.
Technical Context
The PUAD4D employs planar silicon technology to achieve ultra-fast switching performance with controlled reverse recovery characteristics. Its single-die configuration supports high di/dt operation (up to 200 A/µs) and delivers low conduction loss via optimized junction design.
Thermal performance is defined by RθJC = 2.0°C/W and RθJL = 3.5°C/W when mounted on an aluminum heat sink (2" × 3" × 0.25"), enabling sustained 4A average forward current at TJ ≤175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 200 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback or snubber circuits |
| IF | 4 A - Continuous average forward current rating at TC = 115°C; determines steady-state power handling |
| trr | ≤25 ns - Measured under IF = 1.0 A, di/dt = 50 A/µs, VR = 30 V; enables >1 MHz switching in resonant converters |
| VF (max) | 0.92 V at IF = 4 A, TJ = 25°C - Directly impacts conduction loss and thermal rise in high-current paths |
| IFSM | 130 A - Non-repetitive surge current (8.3 ms sine); supports inrush and fault-current robustness |
| RθJC | 2.0 °C/W - Junction-to-case thermal resistance; enables direct heatsink mounting without thermal interface material |
| Qrr | 42 nC - Reverse recovery charge; critical for EMI and switching loss calculation in hard-switched topologies |
Pinout & Package
Package: ThinDPAK (JEDEC TO-252 variation AE), 3-terminal surface-mount package with exposed drain pad for thermal enhancement. Cathode indicated by band on molded body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode) | Input current terminal | Connected to source-side node in buck/flyback; requires low-inductance layout for fast switching |
| 2 (Cathode) | Output current terminal | High-side connection point; carries full load current and reverse recovery current spike |
| 3 (Exposed Pad) | Thermal & electrical ground | Internally connected to cathode; must be soldered to large copper pour for RθJC = 2.0°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (trr ≤25 ns) | Reduces switching losses and EMI generation in >500 kHz DC/DC converters and active clamp circuits |
| Low VF (0.92 V max @ 4A) | Minimizes conduction loss and improves efficiency in high-current, low-voltage output stages |
| ThinDPAK package with exposed cathode pad | Enables 2.0°C/W junction-to-case thermal resistance when soldered to ≥1 in² copper area |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow; supports standard SMT assembly without special handling |
| RoHS-compliant & halogen-free | Meets IPC-1752A environmental compliance requirements for industrial and telecom equipment |
Applications
| Switch-Mode Power Supply Output Rectification | Snubber Circuit Protection |
|---|---|
Use Scenario: Secondary-side rectification in 100–300 W offline AC/DC adapters and server PSUs. IC Role / Device Role / Timing Role: Fast-recovery rectifier replacing slower FRDs to reduce switching loss and improve light-load efficiency. Use Value: 25 ns trr and 42 nC Qrr lower turn-off loss by ~35% vs. standard 600 V FRD in 100 kHz flyback designs. | Use Scenario: RCD snubber network across MOSFET drains in LLC resonant converters. IC Role / Device Role / Timing Role: Clamp diode absorbing inductive energy during MOSFET turn-off transitions. Use Value: Low Qrr and fast trr minimize snubber dissipation and prevent voltage overshoot exceeding 200 V rating. |
| DC/DC Converter Freewheeling Diode | High-Frequency Inverter Auxiliary Rectification |
Use Scenario: Synchronous-buck freewheeling path in telecom POL modules operating at 1–2 MHz. IC Role / Device Role / Timing Role: Complementary rectifier supporting high di/dt (>100 A/µs) and low VF conduction. Use Value: 0.92 V VF at 4A reduces conduction loss by 18% over 1.1 V alternatives, improving 12 V → 1 V conversion efficiency. | Use Scenario: Auxiliary supply rectification in motor drive inverters using SiC MOSFETs. IC Role / Device Role / Timing Role: High-speed clamp rectifier handling fast dv/dt edges (>50 V/ns) from SiC switching. Use Value: 200 V VRRM and 25 ns trr ensure reliable operation without oscillation or secondary breakdown under 600 V bus transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-fast rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH4L06S | 600 V VRRM, 4 A IF, trr = 35 ns, TO-252 package | Higher voltage rating but slower recovery; suited for universal-input PFC stages | Select when 600 V blocking is required and 10 ns slower trr is acceptable |
| MBR4200CT | 200 V VRRM, 4 A IF, Schottky construction, VF ≈ 0.55 V, no reverse recovery | No Qrr or trr, but limited to TJ ≤125°C and higher leakage at elevated temperature | Select for <100°C ambient, low-VF priority, and zero-recovery EMI constraints |
Compared with STTH4L06S and MBR4200CT, the PUAD4D uniquely balances 200 V rating, 25 ns trr, 175°C TJ max, and 0.92 V VF-making it optimal for thermally demanding, high-frequency snubber and DC/DC freewheeling where Schottky leakage or FRD slowness are limiting factors.
Availability
PUAD4D is available at Aetrix Electronics and suitable for high-frequency switching power supplies, DC/DC converters, and snubber circuits requiring stable component supply and consistent thermal performance across production volumes.
Supply support for PUAD4D 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 devices, and MOSFETs for industrial and computing applications.
The PUAD4x series belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion systems where low Qrr, tight VF tolerance, and robust thermal performance are critical.
FAQ
What is the maximum junction temperature rating for PUAD4D?
The PUAD4D has a maximum junction temperature (TJ) rating of +175°C, verified per absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed power supplies or motor drive control boards. Derating curves confirm 4 A average forward current is sustainable up to TC = 115°C, and the device maintains reliability under thermal cycling when properly mounted to a heatsink or large copper plane.
Does PUAD4D have a specified reverse recovery charge (Qrr) value?
Yes, the PUAD4D specifies Qrr = 42 nC under test conditions of IF = 4.0 A, dI/dt = 200 A/µs, and VR = 100 V. This value is measured and published in the Electrical Specifications table and is essential for calculating switching losses and selecting appropriate gate drivers in hard-switched topologies.
Is PUAD4D RoHS compliant and halogen-free?
Yes, PUAD4D is RoHS compliant and halogen-free, as explicitly stated in the FEATURES section of the official datasheet. It meets JEDEC J-STD-020 moisture sensitivity level 1 and passes JESD 201 class 2 whisker testing-ensuring compatibility with lead-free reflow processes and long-term reliability in consumer and industrial applications.
What is the marking code printed on the PUAD4D device body?
The marking code printed on the PUAD4D device body is "UAD4D", as confirmed in the Absolute Maximum Ratings table under "Marking code on the device". This 4-character laser-marked identifier distinguishes it from the 100 V variant PUAD4B (marked "UAD4B") and is used for visual inspection and traceability during assembly and field service.
How does the ThinDPAK package of PUAD4D improve thermal performance compared to standard DPAK?
The ThinDPAK package of PUAD4D achieves RθJC = 2.0°C/W due to optimized die attach and thinner molding compound versus legacy DPAK. When soldered to a 2" × 3" × 0.25" aluminum plate, it delivers 35% lower thermal resistance than standard DPAK equivalents-enabling higher power density in space-constrained DC/DC modules without forced air cooling.
PUAD4D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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:
- 920 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 25 ns
- Current - Reverse Leakage @ Vr:
- 2 µA @ 200 V
- Capacitance @ Vr, F:
- 77pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- ThinDPAK
- Operating Temperature - Junction:
- -55°C ~ 175°C
PUAD4D FAQ
1.How can I place an order for PUAD4D through Aetrix?
Please submit a Request for Quotation (RFQ) for PUAD4D 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 PUAD4D reliable?
The price and inventory of PUAD4D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PUAD4D is usually 5 days.
3.What payment methods are accepted for PUAD4D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PUAD4D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PUAD4D?
PUAD4D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PUAD4D 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 PUAD4D?
For technical support, including PUAD4D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PUAD4D requirements.
6.How does Aetrix verify that PUAD4D is sourced from the original manufacturer or authorized distributors?
All PUAD4D 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 PUAD4D meets industry standards.
7.What is the process for return or replacement of PUAD4D?
All PUAD4D units undergo pre-shipment inspection (PSI). If there is an issue with PUAD4D, 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 PUAD4D part is unused and in its original packaging.
Return procedure for PUAD4D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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