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

Taiwan Semiconductor Corporation PU4DB

Name: PU4DB
Brand: Taiwan Semiconductor Corporation
SKU: PU4DB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU4DB

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: PU4DB.pdf

Description:: 25NS, 4A, 200V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:5,980

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Product details

Overview

PU4DB from Taiwan Semiconductor is a 200V, 4A ultra-fast surface-mount rectifier in DO-214AA (SMB) package, featuring 24 ns reverse recovery time, 0.84 V forward voltage at 4A/25°C, and 130 A surge current capability; used in high-frequency DC/DC converters and snubber circuits.

For engineers reviewing the PU4DB datasheet, PU4DB pinout, PU4DB application, or PU4DB equivalent, key selection criteria include repetitive peak reverse voltage (200 V), thermal resistance (R_θJL = 13 °C/W), junction temperature range (–55 to +175 °C), and ultra-fast switching performance for high-efficiency power conversion.

Technical Context

The PU4DB employs planar silicon technology optimized for low conduction loss and fast recovery, enabling operation in high-frequency switching topologies where di/dt stress and reverse recovery charge (Q_rr = 57 nC) must be minimized. Its single-die configuration and DO-214AA package support automated placement and reflow soldering per J-STD-002.

Thermal design is supported by validated R_θJL = 13 °C/W and R_θJA = 69 °C/W on a 10 mm × 10 mm Cu pad, with moisture sensitivity level 1 (J-STD-020) and RoHS/halogen-free compliance ensuring reliability in industrial and consumer power supplies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - maximum repetitive reverse blocking voltage without breakdown
I_F	4 A - continuous average forward current rating at T_L = 75 °C
t_rr	24 ns - reverse recovery time under IF = 4.0 A, di/dt = 200 A/µs, VR = 100 V
V_F @ 4A/25°C	0.84 V - forward voltage drop determining conduction loss in high-current paths
Q_rr	57 nC - reverse recovery charge directly impacting switching loss and EMI in hard-switched converters
R_θJL	13 °C/W - junction-to-lead thermal resistance enabling direct PCB copper pad heat sinking
I_FSM	130 A - non-repetitive surge current handling capability for transient overloads

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads, UL 94V-0 molding compound, and polarity marked per industry standard.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of rectification path; requires adequate trace width for 4 A continuous current
Cathode	Forward current exit / reverse voltage reference	Marked by band; ties to output rail or snubber node; critical for layout symmetry in high-di/dt applications

Key Features

Feature	Design Value
Ultra-fast recovery (t_rr = 24 ns)	Reduces switching losses and voltage overshoot in 100–500 kHz DC/DC converters
Low V_F (0.84 V @ 4A/25°C)	Minimizes conduction loss and thermal rise in compact power stages
High I_FSM (130 A)	Withstands inrush and fault currents without bond-wire fusing
Moisture sensitivity level 1	Eliminates bake requirement prior to reflow, supporting standard SMT line throughput
Halogen-free & RoHS compliant	Meets IPC-1752A environmental compliance requirements for global OEM shipments

Applications

AC-DC Adapter Secondary Rectification	Active Clamp Snubber Diode
Use Scenario: Secondary-side rectification in 65–100 W offline flyback adapters operating at 65–130 kHz. IC Role / Device Role / Timing Role: Unidirectional current steering during transformer reset phase; conducts only during positive half-cycle of secondary winding voltage. Use Value: 24 ns t_rr and 57 nC Q_rr suppress voltage spikes across primary MOSFET, reducing need for oversized RCD clamp components.	Use Scenario: Clamping diode in active clamp forward or LLC resonant converters with 200–400 kHz switching frequency. IC Role / Device Role / Timing Role: Provides low-loss return path for clamp capacitor discharge during main switch turn-on edge. Use Value: 0.84 V V_F minimizes clamp loop conduction loss; 200 V V_RRM accommodates reflected transients up to 180 V bus.
Isolated DC/DC Converter Output Rectifier	High-Frequency Buck Converter Freewheeling Diode
Use Scenario: Output rectification in 12 V input, 3.3/5 V output isolated DC/DC modules for telecom and industrial control. IC Role / Device Role / Timing Role: Conducts load current when synchronous MOSFET is off; blocks reverse current during synchronous FET conduction. Use Value: 130 A I_FSM handles output short-circuit events; R_θJL = 13 °C/W enables direct thermal coupling to PCB ground plane.	Use Scenario: Freewheeling path in 48 V input, 12 V output buck converters for server VRMs and PoE injectors. IC Role / Device Role / Timing Role: Completes inductor current path during high-side switch off-time; recovers before next cycle begins. Use Value: 24 ns t_rr prevents cross-conduction overlap with high-side FET, maintaining >92% efficiency at 300 kHz.

AC-DC Adapter Secondary Rectification

Active Clamp Snubber Diode

Use Scenario: Secondary-side rectification in 65–100 W offline flyback adapters operating at 65–130 kHz.

IC Role / Device Role / Timing Role: Unidirectional current steering during transformer reset phase; conducts only during positive half-cycle of secondary winding voltage.

Use Value: 24 ns t_rr and 57 nC Q_rr suppress voltage spikes across primary MOSFET, reducing need for oversized RCD clamp components.

Use Scenario: Clamping diode in active clamp forward or LLC resonant converters with 200–400 kHz switching frequency.

IC Role / Device Role / Timing Role: Provides low-loss return path for clamp capacitor discharge during main switch turn-on edge.

Use Value: 0.84 V V_F minimizes clamp loop conduction loss; 200 V V_RRM accommodates reflected transients up to 180 V bus.

Isolated DC/DC Converter Output Rectifier

High-Frequency Buck Converter Freewheeling Diode

Use Scenario: Output rectification in 12 V input, 3.3/5 V output isolated DC/DC modules for telecom and industrial control.

IC Role / Device Role / Timing Role: Conducts load current when synchronous MOSFET is off; blocks reverse current during synchronous FET conduction.

Use Value: 130 A I_FSM handles output short-circuit events; R_θJL = 13 °C/W enables direct thermal coupling to PCB ground plane.

Use Scenario: Freewheeling path in 48 V input, 12 V output buck converters for server VRMs and PoE injectors.

IC Role / Device Role / Timing Role: Completes inductor current path during high-side switch off-time; recovers before next cycle begins.

Use Value: 24 ns t_rr prevents cross-conduction overlap with high-side FET, maintaining >92% efficiency at 300 kHz.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH4L06D	V_RRM = 600 V, t_rr = 35 ns, V_F = 1.15 V @ 4A/25°C	Higher voltage margin but slower recovery and higher conduction loss	Select when system requires >300 V reverse standoff or legacy 600 V designs
ES4D	V_RRM = 200 V, t_rr = 35 ns, V_F = 0.92 V @ 4A/25°C, DO-214AA	Slightly higher V_F and longer t_rr; same package footprint	Acceptable drop-in alternative where 11 ns slower recovery is tolerable in <200 kHz designs

Compared with STTH4L06D and ES4D, the PU4DB delivers superior high-frequency efficiency due to its 24 ns t_rr and 0.84 V V_F, making it optimal for 200–500 kHz power stages where switching loss dominates thermal budget.

Availability

PU4DB is available at Aetrix Electronics and suitable for AC-DC adapters, isolated DC/DC modules, active clamp snubbers, and high-frequency buck converters requiring stable component supply and consistent parametric performance across production lots.

Supply support for PU4DB 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 diodes, and MOSFETs for industrial and consumer markets.

The PU4DB belongs to TSC's PU4x ultra-fast rectifier family, designed specifically for high-efficiency, high-frequency switching power supplies where low Q_rr, tight V_F distribution, and robust surge capability are essential.

FAQ

What is the maximum repetitive peak reverse voltage rating for PU4DB?

The PU4DB has a maximum repetitive peak reverse voltage (V_RRM) rating of 200 V, verified per absolute maximum ratings table in TSC datasheet A2210. This rating defines the highest reverse voltage the device can block continuously without avalanche breakdown under specified thermal conditions. Exceeding 200 V may cause irreversible failure. The PU4DB is not rated for 250 V or higher reverse stress.

Does PU4DB have a documented reverse recovery time, and under what test conditions?

Yes, PU4DB has a documented reverse recovery time (t_rr) of 24 ns, measured under IF = 4.0 A, di/dt = 200 A/µs, and VR = 100 V per TSC datasheet A2210. This value is confirmed in the Electrical Specifications table and reflects actual performance in hard-switched converter applications. It is not derived from typical curves or extrapolated from lower-current test points.

Is PU4DB compatible with lead-free reflow soldering processes?

Yes, PU4DB supports lead-free reflow soldering per J-STD-002. Its matte tin-plated leads and DO-214AA package are qualified for peak temperatures up to 260 °C with ≤60 seconds above 217 °C. Moisture sensitivity level 1 eliminates pre-bake requirements, enabling direct placement into standard SMT lines without process modification.

What is the junction-to-lead thermal resistance (R_θJL) of PU4DB, and how is it measured?

The PU4DB has a junction-to-lead thermal resistance (R_θJL) of 13 °C/W, measured on a standardized 10 mm × 10 mm copper pad PCB per JEDEC JESD51-14. This value enables accurate thermal modeling of solder-joint temperature rise under 4 A DC load and is critical for predicting long-term reliability in thermally constrained layouts. It is not an ambient-based rating.

Can PU4DB replace PU4BB in a design, and what parameter change must be verified?

PU4DB can replace PU4BB only if the circuit requires 200 V reverse blocking instead of 100 V - the sole functional difference between them. Designers must verify that all reverse voltage transients remain below 200 V, and that forward voltage and thermal behavior remain acceptable at the same 4 A load. No other electrical or mechanical changes are introduced; both share identical package, pinout, and thermal specs.

PU4DB Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AA, SMB

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:: 930 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:: 78pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AA (SMB)

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

PU4DB FAQ

1.How can I place an order for PU4DB through Aetrix?

Please submit a Request for Quotation (RFQ) for PU4DB 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 PU4DB reliable?

The price and inventory of PU4DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU4DB is usually 5 days.

3.What payment methods are accepted for PU4DB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU4DB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU4DB?

PU4DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU4DB 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 PU4DB?

For technical support, including PU4DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU4DB requirements.

6.How does Aetrix verify that PU4DB is sourced from the original manufacturer or authorized distributors?

All PU4DB 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 PU4DB meets industry standards.

7.What is the process for return or replacement of PU4DB?

All PU4DB units undergo pre-shipment inspection (PSI). If there is an issue with PU4DB, 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 PU4DB part is unused and in its original packaging.

Return procedure for PU4DB:

1.Submit a request within 90 days.

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

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