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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Taiwan Semiconductor Corporation PU2DFS

Name: PU2DFS
Brand: Taiwan Semiconductor Corporation
SKU: PU2DFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU2DFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: PU2DFS.pdf

Description:: 25NS, 2A, 200V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:27,523

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Product details

Overview

PU2DFS from Taiwan Semiconductor is a 2 A, 200 V ultra-fast surface-mount rectifier diode in SOD-128 package, featuring 25 ns reverse recovery time, 0.93 V max forward voltage at 2 A/25°C, and 50 A surge current capability - used in high-frequency DC/DC converters and snubber circuits.

For engineers reviewing the PU2DFS datasheet, PU2DFS pinout, PU2DFS application, or PU2DFS equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, ultra-fast trr ≤25 ns, low R_θJA of 74 °C/W, and SOD-128 thermal performance on standard PCB pads.

Technical Context

This single-die planar silicon rectifier operates with ultra-fast switching characteristics enabled by optimized carrier lifetime control. Its 25 ns reverse recovery time (trr) and 31 nC reverse recovery charge (Q_rr) support high-frequency operation up to several hundred kHz in hard-switched topologies.

The device delivers 2 A average forward current with derating above 75°C ambient, supported by a maximum junction temperature of 175°C and thermal resistance of 17 °C/W (junction-to-lead). Cathode band polarity marking ensures unambiguous PCB orientation during automated placement.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - supports input rails up to 140 V DC in offline or industrial DC/DC designs
I_F	2 A continuous - suitable for medium-power output rectification without forced cooling
t_rr	≤25 ns - enables efficient operation in >200 kHz switching converters with low switching loss
V_F @ 2 A, 25°C	0.93 V max - limits conduction loss to <1.86 W at full load, easing thermal design
I_FSM	50 A @ 8.3 ms - withstands typical power-up inrush and transient overloads
R_θJA	74 °C/W - requires ≥5 mm × 5 mm Cu pad for safe operation at full I_F in still air
C_J	32 pF @ 4 V - minimizes capacitive coupling noise in high-dV/dt snubber applications

Pinout & Package

Package: SOD-128 - molded surface-mount case with matte tin-plated leads, UL 94V-0 rated compound, cathode band polarity indicator, and 0.028 g mass.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry node	Connected to lower-potential side (e.g., switch node in flyback secondary)
Cathode	Forward current exit node	Marked by visible band; ties to output rail or filter capacitor positive

Key Features

Feature	Design Value
Ultra-fast recovery (t_rr ≤25 ns)	Reduces switching losses and EMI generation in high-frequency SMPS
Low V_F (0.93 V max @ 2 A)	Minimizes conduction loss and improves efficiency in 12–48 V output stages
SOD-128 thermal performance (R_θJL = 17 °C/W)	Enables direct heat transfer to PCB copper, supporting compact layout without heatsinks
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow, compatible with standard J-STD-020 assembly
Halogen-free & RoHS compliant	Meets IPC-1752A material declaration and environmental compliance for global markets

Applications

AC-DC Adapter Secondary Rectification	Active Clamp Flyback Snubber Diode
Use Scenario: 24 V/2 A output stage in universal-input 90–264 V AC adapter with 100 kHz switching frequency. IC Role / Device Role / Timing Role: Output rectifier conducting during transformer reset phase; handles bidirectional voltage stress during clamp cycle. Use Value: 200 V V_RRM margin accommodates reflected clamp voltage spikes; 25 ns t_rr prevents reverse conduction loss during fast transitions.	Use Scenario: Clamp path in 65 W active-clamp flyback for USB PD chargers, operating at 250 kHz. IC Role / Device Role / Timing Role: Fast-recovery snubber diode clamping drain voltage during MOSFET turn-off. Use Value: Low Q_rr (31 nC) and fast t_rr reduce energy dissipation in clamp circuit; SOD-128 footprint fits tight layout constraints.
Isolated DC/DC Converter Output Stage	High-Frequency Buck-Derived Isolated Supply
Use Scenario: 5 V/2 A isolated auxiliary supply in telecom shelf management system with 300 kHz PWM. IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-duty-cycle forward topology. Use Value: 2 A I_F rating and 175°C T_JMAX ensure reliability under sustained load; 74 °C/W R_θJA allows operation on 2-layer board.	Use Scenario: Output rectifier in buck-derived isolated 12 V/1.5 A supply for FPGA core logic, switching at 500 kHz. IC Role / Device Role / Timing Role: High-speed unidirectional current path during transformer secondary conduction interval. Use Value: 32 pF C_J limits displacement current during high-dV/dt transitions; 0.87 V typical V_F at 2 A reduces thermal stress.

AC-DC Adapter Secondary Rectification

Active Clamp Flyback Snubber Diode

Use Scenario: 24 V/2 A output stage in universal-input 90–264 V AC adapter with 100 kHz switching frequency.

IC Role / Device Role / Timing Role: Output rectifier conducting during transformer reset phase; handles bidirectional voltage stress during clamp cycle.

Use Value: 200 V V_RRM margin accommodates reflected clamp voltage spikes; 25 ns t_rr prevents reverse conduction loss during fast transitions.

Use Scenario: Clamp path in 65 W active-clamp flyback for USB PD chargers, operating at 250 kHz.

IC Role / Device Role / Timing Role: Fast-recovery snubber diode clamping drain voltage during MOSFET turn-off.

Use Value: Low Q_rr (31 nC) and fast t_rr reduce energy dissipation in clamp circuit; SOD-128 footprint fits tight layout constraints.

Isolated DC/DC Converter Output Stage

High-Frequency Buck-Derived Isolated Supply

Use Scenario: 5 V/2 A isolated auxiliary supply in telecom shelf management system with 300 kHz PWM.

IC Role / Device Role / Timing Role: Synchronous rectifier replacement in low-duty-cycle forward topology.

Use Value: 2 A I_F rating and 175°C T_JMAX ensure reliability under sustained load; 74 °C/W R_θJA allows operation on 2-layer board.

Use Scenario: Output rectifier in buck-derived isolated 12 V/1.5 A supply for FPGA core logic, switching at 500 kHz.

IC Role / Device Role / Timing Role: High-speed unidirectional current path during transformer secondary conduction interval.

Use Value: 32 pF C_J limits displacement current during high-dV/dt transitions; 0.87 V typical V_F at 2 A reduces thermal stress.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-fast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH2R02	2 A, 200 V, trr = 35 ns, VF = 0.95 V max @ 2 A, SOD-128	Higher trr increases switching loss in >250 kHz designs	Preferred where cost sensitivity outweighs ultra-fast timing needs
ES2D	2 A, 200 V, trr = 35 ns, VF = 0.92 V max @ 2 A, SMA	SMA package has higher R_θJA (~100 °C/W); not drop-in for SOD-128 layout	Consider only if existing SMA footprint must be reused; thermal derating required

Compared with STTH2R02 and ES2D, PU2DFS offers the lowest trr (≤25 ns) and best thermal resistance in SOD-128, making it optimal for high-frequency, space-constrained DC/DC and snubber use cases where switching loss and board area are critical.

Availability

PU2DFS is available at Aetrix Electronics and suitable for high-frequency switching power supplies, DC/DC converters, and snubber networks requiring stable component supply and consistent parametric performance across production lots.

Supply support for PU2DFS 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 PU2DFS belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion where low trr, low V_F, and robust thermal performance are essential.

FAQ

What is the maximum repetitive peak reverse voltage rating for PU2DFS?

The PU2DFS has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, verified per Taiwan Semiconductor's A2210 datasheet revision. This rating defines the highest continuous reverse-bias voltage the device can block without breakdown. Designers should maintain at least 20% margin below this value in systems with voltage transients or ringing. The PU2DFS is not rated for avalanche operation.

Does PU2DFS support automated SMT placement, and what is its moisture sensitivity level?

Yes, PU2DFS supports automated surface-mount placement per its SOD-128 package and matte tin-plated leads. Its moisture sensitivity level is Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/85% RH and requires no baking before reflow soldering - simplifying manufacturing flow. The PU2DFS also passes JESD 201 Class 2 whisker testing.

What is the typical forward voltage drop of PU2DFS at 2 A and 125°C junction temperature?

The typical forward voltage drop of PU2DFS is 0.73 V at 2 A and 125°C junction temperature, as specified in the Electrical Specifications table of the A2210 datasheet. This value reflects reduced V_F due to positive temperature coefficient behavior in silicon rectifiers. At room temperature, PU2DFS shows 0.87 V typical at the same current.

Can PU2DFS be used as a direct replacement for PU2BFS in an existing design?

PU2DFS is not a direct replacement for PU2BFS due to its higher 200 V V_RRM versus PU2BFS's 100 V rating - though both share identical package, pinout, and thermal specs. Substituting PU2DFS into a PU2BFS design is electrically safe but may incur minor cost premium; substituting PU2BFS into a PU2DFS design risks reverse breakdown. Always verify voltage stress margins before interchange.

What is the reverse recovery charge (Q_rr) specification for PU2DFS, and why does it matter?

The reverse recovery charge (Q_rr) for PU2DFS is 31 nC, measured under IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A conditions. Q_rr directly impacts switching loss and EMI in hard-switched converters - lower Q_rr reduces energy dissipated during diode turn-off. This makes PU2DFS especially valuable in high-frequency DC/DC and snubber applications where efficiency and noise are critical.

PU2DFS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 200 V

Current - Average Rectified (Io):: 2A

Voltage - Forward (Vf) (Max) @ If:: 930 mV @ 2 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 25 ns

Current - Reverse Leakage @ Vr:: 2 µA @ 200 V

Capacitance @ Vr, F:: 32pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

Operating Temperature - Junction:: -55°C ~ 175°C

PU2DFS FAQ

1.How can I place an order for PU2DFS through Aetrix?

Please submit a Request for Quotation (RFQ) for PU2DFS 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 PU2DFS reliable?

The price and inventory of PU2DFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU2DFS is usually 5 days.

3.What payment methods are accepted for PU2DFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU2DFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU2DFS?

PU2DFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU2DFS 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 PU2DFS?

For technical support, including PU2DFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU2DFS requirements.

6.How does Aetrix verify that PU2DFS is sourced from the original manufacturer or authorized distributors?

All PU2DFS 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 PU2DFS meets industry standards.

7.What is the process for return or replacement of PU2DFS?

All PU2DFS units undergo pre-shipment inspection (PSI). If there is an issue with PU2DFS, 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 PU2DFS part is unused and in its original packaging.

Return procedure for PU2DFS:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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