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

Taiwan Semiconductor Corporation PUUP3B

Name: PUUP3B
Brand: Taiwan Semiconductor Corporation
SKU: PUUP3B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PUUP3B

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-277, 3-PowerDFN

Datasheet:: PUUP3B.pdf

Description:: 25NS, 3A, 100V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:6,000

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Product details

Overview

PUUP3B from Taiwan Semiconductor is a 100V, 3A ultra-fast surface-mount rectifier in TO-277A (SMPC4.6U) package, featuring 25ns reverse recovery time, 0.86V forward voltage at 3A/25°C, and 85A surge capability - deployed in high-frequency DC/DC converters and snubber circuits.

For engineers reviewing the PUUP3B datasheet, PUUP3B pinout, PUUP3B application, or PUUP3B equivalent, key selection criteria include V_RRM = 100V, I_F = 3A, t_rr ≤ 25ns, R_θJL = 2.0°C/W, and wettable flank compatibility with automated optical inspection (AOI) and reflow processes.

Technical Context

The PUUP3B uses planar silicon technology to achieve ultra-fast switching with low Q_rr (51nC) and minimal reverse recovery current (I_RM = 4.9A), enabling efficient operation in hard-switched topologies. Its single-die configuration and TO-277A package support high power density and thermal reliability up to T_J = 175°C.

Designed for high-frequency applications, the device delivers stable reverse leakage (<2µA @ 25°C, <10µA @ 125°C) and low junction capacitance (47pF @ 1MHz, 4V), minimizing switching losses and EMI generation in resonant and quasi-resonant converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum repetitive reverse blocking voltage; defines safe operating range in DC/DC flyback and snubber networks
I_F	3 A continuous - average forward current rating at T_L = 115°C; supports compact heatsinkless designs in 12–48V systems
t_rr	25 ns - measured at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables >500 kHz switching without excessive diode loss
V_F	0.86 V max @ 3A/25°C - low conduction loss improves efficiency in high-duty-cycle rectification stages
R_θJL	2.0 °C/W - junction-to-lead thermal resistance with ideal heatsink; enables direct PCB copper pad thermal transfer
Q_rr	51 nC - reverse recovery charge; reduces turn-off switching loss and voltage overshoot in hard-switched MOSFET bridges

Pinout & Package

Package: TO-277A (SMPC4.6U), surface-mount, single-die, cathode-banded polarity, matte tin-plated leads, wettable flank profile for AOI compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Anode connection	Primary current entry point; electrically identical to Pin 2 in parallel anode configuration
2 (Anode)	Anode connection	Second anode terminal - internal parallel connection to Pin 1 for enhanced current sharing and thermal distribution
3 (Cathode)	Cathode connection	Common output node; marked by cathode band; carries full forward current and reverse recovery return path

Key Features

Feature	Design Value
Ultra-fast recovery	t_rr ≤ 25 ns ensures minimal switching loss and reduced EMI in >300 kHz DC/DC converters
Wettable flank leads	Enables reliable solder joint inspection via automated optical inspection (AOI) on bottom-side SMT assemblies
Low Q_rr	51 nC reduces voltage spike and ringing during MOSFET turn-on in synchronous rectifier and active clamp circuits
High surge robustness	I_FSM = 85 A (8.3 ms) supports transient overload tolerance in industrial power supplies and motor drives
Moisture sensitivity level 1	No floor life limitation or bake requirement before reflow - simplifies manufacturing logistics and inventory handling

Applications

AC-DC Adapter Secondary Rectification	Active Clamp Flyback Snubber Diode
Use Scenario: 12V/3A output stage in compact wall adapters using QR flyback topology. IC Role / Device Role / Timing Role: Primary unidirectional current path during transformer reset; handles reverse recovery during MOSFET turn-on edge. Use Value: 25ns t_rr and 51nC Q_rr suppress voltage overshoot across primary switch, reducing need for snubber R/C components.	Use Scenario: Clamp loop in active clamp flyback converter operating at 350 kHz with 100V input. IC Role / Device Role / Timing Role: Fast-recovery path for magnetizing current during clamp capacitor discharge phase. Use Value: Low V_F (0.86V) minimizes conduction loss in clamp loop; wettable flank ensures reliable solder joint integrity under thermal cycling.
Isolated DC/DC Converter Output Rectifier	High-Frequency Buck Converter Freewheeling Diode
Use Scenario: 48V-to-12V isolated half-bridge DC/DC module for telecom power shelves. IC Role / Device Role / Timing Role: Secondary-side synchronous rectification assist or freewheeling path when SR MOSFET is off. Use Value: R_θJL = 2.0°C/W allows direct thermal coupling to PCB copper, maintaining T_J < 125°C at full load without heatsink.	Use Scenario: 24V-to-5V buck converter in industrial PLC I/O module with 1 MHz switching frequency. IC Role / Device Role / Timing Role: Freewheeling diode during high-side MOSFET off-time; critical for maintaining current continuity. Use Value: 47pF C_J and fast t_rr reduce displacement current and switching node ringing, improving EMI compliance.

AC-DC Adapter Secondary Rectification

Active Clamp Flyback Snubber Diode

Use Scenario: 12V/3A output stage in compact wall adapters using QR flyback topology.

IC Role / Device Role / Timing Role: Primary unidirectional current path during transformer reset; handles reverse recovery during MOSFET turn-on edge.

Use Value: 25ns t_rr and 51nC Q_rr suppress voltage overshoot across primary switch, reducing need for snubber R/C components.

Use Scenario: Clamp loop in active clamp flyback converter operating at 350 kHz with 100V input.

IC Role / Device Role / Timing Role: Fast-recovery path for magnetizing current during clamp capacitor discharge phase.

Use Value: Low V_F (0.86V) minimizes conduction loss in clamp loop; wettable flank ensures reliable solder joint integrity under thermal cycling.

Isolated DC/DC Converter Output Rectifier

High-Frequency Buck Converter Freewheeling Diode

Use Scenario: 48V-to-12V isolated half-bridge DC/DC module for telecom power shelves.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectification assist or freewheeling path when SR MOSFET is off.

Use Value: R_θJL = 2.0°C/W allows direct thermal coupling to PCB copper, maintaining T_J < 125°C at full load without heatsink.

Use Scenario: 24V-to-5V buck converter in industrial PLC I/O module with 1 MHz switching frequency.

IC Role / Device Role / Timing Role: Freewheeling diode during high-side MOSFET off-time; critical for maintaining current continuity.

Use Value: 47pF C_J and fast t_rr reduce displacement current and switching node ringing, improving EMI compliance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-3EYH01-M3/57T	V_RRM = 100V, I_F = 3A, t_rr = 35ns, TO-277A package, no wettable flank	Higher t_rr increases switching loss in >400 kHz designs; lacks AOI-compatible lead finish	Acceptable where lower cost outweighs AOI and ultra-fast recovery requirements
ON Semiconductor MUR310SFT1G	V_RRM = 100V, I_F = 3A, t_rr = 60ns, TO-277A, RoHS/halogen-free, no wettable flank	Slower recovery increases voltage overshoot risk in hard-switched topologies; higher Q_rr (~100nC)	Suitable for <300 kHz applications where thermal margin exists and AOI is not required

Compared with VS-3EYH01-M3/57T and MUR310SFT1G, the PUUP3B offers superior high-frequency performance due to its 25ns t_rr, 51nC Q_rr, and wettable flank - delivering measurable reduction in switching loss and improved manufacturability in space-constrained, high-density power modules.

Availability

PUUP3B is available at Aetrix Electronics and suitable for high-frequency DC/DC converters, active clamp snubbers, and isolated adapter secondary rectification requiring stable component supply and consistent parametric performance across production lots.

Supply support for PUUP3B 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 computing applications.

The PUUP3B belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion systems where low Q_rr, tight thermal resistance, and process-compatible packaging are essential.

FAQ

What is the maximum junction temperature rating for PUUP3B?

The PUUP3B has a maximum junction temperature (T_J) rating of +175°C, verified per absolute maximum ratings table. This allows operation in high-ambient environments such as enclosed industrial power supplies. Derating curves confirm usable current capacity down to T_L = 115°C at full 3A, making PUUP3B suitable for thermally constrained layouts without forced air cooling.

Does PUUP3B support automated optical inspection (AOI)?

Yes, PUUP3B features wettable flank leads compliant with IPC-J-STD-020 Level 1 moisture sensitivity, enabling reliable solder joint inspection using standard AOI systems. The matte tin plating and defined flank geometry ensure consistent contrast and measurement accuracy on bottom-side SMT placements - a key advantage over non-wettable alternatives like MUR310SFT1G.

What is the reverse recovery time specification for PUUP3B?

The PUUP3B reverse recovery time (t_rr) is specified as ≤25ns under test conditions of I_F = 0.5A, I_R = 1.0A, and I_rr = 0.25A. An alternate condition (I_F = 1.0A, di/dt = 50A/µs, V_R = 30V) yields 31ns. Both values are confirmed in the Electrical Specifications table and support stable operation in >500 kHz switching applications.

How does PUUP3B differ from PUUP3D?

The PUUP3B and PUUP3D share identical package (TO-277A), current rating (3A), and thermal specs, but differ in rated reverse voltage: PUUP3B is 100V (V_RRM), while PUUP3D is 200V. Marking codes are PU3BH vs. PU3DH. No other electrical or mechanical differences exist - they are voltage-scaled variants within the same platform.

What is the forward voltage drop of PUUP3B at full rated current?

The PUUP3B forward voltage (V_F) is 0.86V maximum at I_F = 3.0A and T_J = 25°C, with typical value 0.81V. At elevated junction temperature (125°C), V_F drops to 0.73V typical, reflecting positive temperature coefficient behavior beneficial for current sharing in parallel configurations.

PUUP3B Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: TO-277, 3-PowerDFN

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 100 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 @ 100 V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMPC4.6U

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

PUUP3B FAQ

1.How can I place an order for PUUP3B through Aetrix?

Please submit a Request for Quotation (RFQ) for PUUP3B 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 PUUP3B reliable?

The price and inventory of PUUP3B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PUUP3B is usually 5 days.

3.What payment methods are accepted for PUUP3B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PUUP3B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PUUP3B?

PUUP3B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PUUP3B 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 PUUP3B?

For technical support, including PUUP3B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PUUP3B requirements.

6.How does Aetrix verify that PUUP3B is sourced from the original manufacturer or authorized distributors?

All PUUP3B 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 PUUP3B meets industry standards.

7.What is the process for return or replacement of PUUP3B?

All PUUP3B units undergo pre-shipment inspection (PSI). If there is an issue with PUUP3B, 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 PUUP3B part is unused and in its original packaging.

Return procedure for PUUP3B:

1.Submit a request within 90 days.

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

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