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

Taiwan Semiconductor Corporation PU3DB

Name: PU3DB
Brand: Taiwan Semiconductor Corporation
SKU: PU3DB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU3DB

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: PU3DB.pdf

Description:: 25NS, 3A, 200V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:6,000

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Product details

Overview

PU3DB from Taiwan Semiconductor is a 200V, 3A ultra-fast surface-mount rectifier in DO-214AA (SMB) package, featuring 25ns reverse recovery time, 0.93V max forward voltage at 3A/25°C, and 175°C maximum junction temperature. It serves as a high-efficiency freewheeling or snubber diode in high-frequency DC/DC converters.

For engineers reviewing the PU3DB datasheet, PU3DB pinout, PU3DB application, or PU3DB equivalent, key selection criteria include its 200V V_RRM, ultra-fast trr ≤25ns, low R_θJA = 71°C/W on standard PCB, and RoHS/halogen-free compliance for industrial power supply design.

Technical Context

The PU3DB employs planar silicon technology optimized for fast switching with low stored charge (Q_rr = 51nC) and minimal reverse recovery current (I_RM = 4.9A). Its thermal design supports continuous 3A conduction with junction-to-lead resistance of 14°C/W.

Rated for repetitive peak reverse voltage of 200V and surge current up to 85A (8.3ms), the device operates across –55°C to +175°C and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	200 V - Maximum blocking voltage before breakdown; defines usable input range in 100–200V DC/DC stages
I_F	3 A - Continuous forward current rating at T_A = 25°C; derates linearly above 25°C per curve Fig.1
t_rr	25 ns - Measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables >1MHz switching without excessive switching loss
V_F (max)	0.93 V - At I_F = 3.0A, T_J = 25°C; directly determines conduction loss in high-current paths
Q_rr	51 nC - Reverse recovery charge; impacts EMI generation and snubber sizing in hard-switched topologies
R_θJA	71 °C/W - Junction-to-ambient thermal resistance on 10mm × 10mm Cu pad; sets minimum heatsinking requirement

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode-indicated band; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.

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 voltage blocking terminal	Marked by band; ties to output rail or positive bus; blocks 200V reverse during off-state

Key Features

Feature	Design Value
Ultra-fast recovery (t_rr ≤25ns)	Reduces switching loss and EMI in >500kHz DC/DC converters and active clamp circuits
Low V_F (0.93V max @ 3A)	Minimizes conduction loss in high-current, low-voltage output stages (e.g., 5V/3A rails)
High T_J_MAX (175°C)	Enables operation in thermally constrained environments without derating below full 3A current
RoHS & halogen-free	Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing compliance

Applications

AC-DC Adapter Secondary Rectification	DC/DC Buck Converter Freewheel Diode
Use Scenario: Secondary-side rectification in 12–24V output flyback adapters operating at 65–130kHz. IC Role / Device Role / Timing Role: Unidirectional current steering during transformer reset; handles 3A average load with minimal voltage drop. Use Value: 0.93V V_F reduces secondary conduction loss by ~15% vs. standard FR107, improving efficiency at light-to-moderate loads.	Use Scenario: Freewheel path in 12V-input, 5V/3A synchronous buck converter where high-side FET is actively controlled. IC Role / Device Role / Timing Role: Provides low-loss current recirculation during high-side FET off-time; t_rr ≤25ns prevents shoot-through risk. Use Value: 51nC Q_rr limits reverse recovery energy dissipation, reducing MOSFET stress and gate driver loading.
Snubber Network Clamp Diode	Industrial Motor Drive Brake Circuit
Use Scenario: Clamp diode in RCD snubber across primary-side MOSFET in offline SMPS. IC Role / Device Role / Timing Role: Rapidly conducts snubber capacitor discharge pulse (tens of ns duration) after MOSFET turn-off. Use Value: 25ns t_rr ensures full recovery before next switching cycle, preventing voltage overshoot from incomplete charge removal.	Use Scenario: Regenerative braking path in 24V DC motor controllers with H-bridge topology. IC Role / Device Role / Timing Role: Conducts back-EMF current during PWM off-time; rated for 85A non-repetitive surge during emergency stop. Use Value: 175°C T_J_MAX and 85A I_FSM support short-duration, high-energy braking pulses without thermal runaway.

AC-DC Adapter Secondary Rectification

DC/DC Buck Converter Freewheel Diode

Use Scenario: Secondary-side rectification in 12–24V output flyback adapters operating at 65–130kHz.

IC Role / Device Role / Timing Role: Unidirectional current steering during transformer reset; handles 3A average load with minimal voltage drop.

Use Value: 0.93V V_F reduces secondary conduction loss by ~15% vs. standard FR107, improving efficiency at light-to-moderate loads.

Use Scenario: Freewheel path in 12V-input, 5V/3A synchronous buck converter where high-side FET is actively controlled.

IC Role / Device Role / Timing Role: Provides low-loss current recirculation during high-side FET off-time; t_rr ≤25ns prevents shoot-through risk.

Use Value: 51nC Q_rr limits reverse recovery energy dissipation, reducing MOSFET stress and gate driver loading.

Snubber Network Clamp Diode

Industrial Motor Drive Brake Circuit

Use Scenario: Clamp diode in RCD snubber across primary-side MOSFET in offline SMPS.

IC Role / Device Role / Timing Role: Rapidly conducts snubber capacitor discharge pulse (tens of ns duration) after MOSFET turn-off.

Use Value: 25ns t_rr ensures full recovery before next switching cycle, preventing voltage overshoot from incomplete charge removal.

Use Scenario: Regenerative braking path in 24V DC motor controllers with H-bridge topology.

IC Role / Device Role / Timing Role: Conducts back-EMF current during PWM off-time; rated for 85A non-repetitive surge during emergency stop.

Use Value: 175°C T_J_MAX and 85A I_FSM support short-duration, high-energy braking pulses without thermal runaway.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH3L06S	V_RRM = 600V, I_F = 3A, t_rr = 35ns, DO-214AA	Higher voltage rating but slower recovery; higher V_F (1.15V)	Preferred only when system requires >200V blocking margin; not optimal for 200V-class high-frequency designs
SS3H9	V_RRM = 90V, I_F = 3A, t_rr = 30ns, DO-214AA	Lower V_RRM; similar speed but insufficient for 200V applications	Valid alternative only in ≤90V systems; unsuitable as direct replacement for PU3DB's 200V rating

Compared with STTH3L06S and SS3H9, the PU3DB uniquely balances 200V V_RRM, 25ns t_rr, and 0.93V V_F in DO-214AA-making it the only option among the three qualified for 100–200V, high-frequency, low-loss rectification without over-spec'ing voltage or sacrificing speed.

Availability

PU3DB is available at Aetrix Electronics and suitable for AC-DC adapters, DC/DC buck converters, snubber networks, and industrial motor drive brake circuits requiring stable component supply and consistent thermal performance.

Supply support for PU3DB 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 global power electronics markets since 1979.

The PU3DB belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency switching power supplies where low Q_rr, tight V_F tolerance, and robust thermal performance are critical.

FAQ

What is the maximum repetitive peak reverse voltage (V_RRM) for PU3DB?

The PU3DB has a maximum repetitive peak reverse voltage (V_RRM) of 200 V, as confirmed in the Absolute Maximum Ratings table on page 1 of the A2210 datasheet. This rating defines the highest reverse voltage the device can block continuously without breakdown under normal operating conditions, making it suitable for 200V-class power conversion stages.

Does PU3DB have a specified reverse recovery time (t_rr)?

Yes, the PU3DB specifies a reverse recovery time (t_rr) of ≤25 ns under test conditions of I_F = 0.5A, I_R = 1.0A, and I_rr = 0.25A. This value is listed in the Electrical Specifications table and confirms its classification as an ultra-fast rectifier suitable for high-frequency switching applications.

What package type does PU3DB use, and is it lead-free?

The PU3DB uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads. It is RoHS compliant and halogen-free per IEC 61249-2-21, meeting J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements-fully compatible with lead-free reflow processes.

What is the forward voltage (V_F) of PU3DB at 3A and 25°C?

The forward voltage (V_F) of PU3DB is 0.86 V typical and 0.93 V maximum at I_F = 3.0A and T_J = 25°C, as stated in the Electrical Specifications table. This low V_F minimizes conduction losses in high-current paths such as DC/DC output stages.

Is PU3DB suitable for use in automotive applications?

The PU3DB is not qualified for automotive applications per AEC-Q101. The datasheet explicitly states that TSC products-including PU3DB-are "not designed for use in medical, life-saving, or life-sustaining applications," and no AEC qualification data is provided. For automotive-grade alternatives, consult TSC's AEC-Q101-certified rectifier portfolio.

PU3DB 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):: 3A

Voltage - Forward (Vf) (Max) @ If:: 930 mV @ 3 A

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

Reverse Recovery Time (trr):: 25 ns

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

Capacitance @ Vr, F:: 47pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

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

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

PU3DB FAQ

1.How can I place an order for PU3DB through Aetrix?

Please submit a Request for Quotation (RFQ) for PU3DB 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 PU3DB reliable?

The price and inventory of PU3DB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU3DB is usually 5 days.

3.What payment methods are accepted for PU3DB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU3DB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU3DB?

PU3DB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU3DB 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 PU3DB?

For technical support, including PU3DB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU3DB requirements.

6.How does Aetrix verify that PU3DB is sourced from the original manufacturer or authorized distributors?

All PU3DB 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 PU3DB meets industry standards.

7.What is the process for return or replacement of PU3DB?

All PU3DB units undergo pre-shipment inspection (PSI). If there is an issue with PU3DB, 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 PU3DB part is unused and in its original packaging.

Return procedure for PU3DB:

1.Submit a request within 90 days.

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

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