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

Taiwan Semiconductor Corporation PUUP4B

Name: PUUP4B
Brand: Taiwan Semiconductor Corporation
SKU: PUUP4B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PUUP4B

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: TO-277, 3-PowerDFN

Datasheet:: PUUP4B.pdf

Description:: 25NS, 4A, 100V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:5,998

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Product details

Overview

PUUP4B from Taiwan Semiconductor is a 4A, 100V ultra-fast surface-mount rectifier in TO-277A (SMPC4.6U) package, featuring 25ns reverse recovery time, 0.84V forward voltage at 4A/25°C, and 130A surge capability - deployed in high-frequency DC/DC converters and snubber circuits.

For engineers reviewing the PUUP4B datasheet, PUUP4B pinout, PUUP4B application, or PUUP4B equivalent, key selection criteria include V_RRM = 100V, I_F = 4A, t_rr = 25ns, R_θJL = 2.0°C/W, and wettable flank packaging for automated optical inspection.

Technical Context

This single-die ultra-fast rectifier uses planar technology to achieve low conduction loss and fast switching performance. Its 25ns reverse recovery time and 57nC reverse recovery charge enable efficient operation in high-frequency switching topologies up to several hundred kHz.

The device supports automated placement and soldering with matte tin-plated leads, J-STD-002 compliance, and moisture sensitivity level 1. Thermal performance is characterized with R_θJA = 52.4°C/W on 16mm × 16mm PCB copper pad and R_θJL = 2.0°C/W under ideal heatsink conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; defines safe operating range in clamping/snubber applications
I_F	4 A - Continuous average forward current at T_L = 115°C; determines steady-state power handling in DC/DC output stages
t_rr	25 ns - Reverse recovery time at I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A; enables >500 kHz switching without excessive switching loss
V_F	0.84 V @ 4A, 25°C - Forward voltage drop; directly impacts conduction loss and thermal design in high-current paths
R_θJL	2.0 °C/W - Junction-to-lead thermal resistance with ideal heatsink; enables direct thermal coupling to PCB copper or external heatsink
Q_rr	57 nC - Reverse recovery charge; critical for EMI control and MOSFET gate drive stress in hard-switched converters

Pinout & Package

Package: TO-277A (SMPC4.6U), surface-mount, single-die configuration with cathode band marking and wettable flank terminals for AOI compatibility.

Pin/Terminal	Circuit Role	Design Meaning
1 (Anode)	Anode connection	Primary current entry point; electrically tied to internal die anode; requires proper trace width for 4A continuous current
2 (Anode)	Anode connection	Second anode terminal - device uses dual-anode layout for lower inductance and improved current sharing in parallel configurations
3 (Cathode)	Cathode connection	Common cathode output; marked by visible band; serves as return path for forward current and clamping node in snubber circuits

Key Features

Feature	Design Value
Ultra-fast recovery	t_rr = 25 ns ensures minimal switching loss and reduced EMI in high-frequency DC/DC converters
Wettable flank terminals	Enables reliable automated optical inspection (AOI) of solder joints on bottom-side SMT placements
Low forward voltage	V_F = 0.84 V @ 4A/25°C reduces conduction loss and improves system efficiency at rated load
J-STD-020 Level 1 MSL	Zero floor life limitation - no baking required prior to reflow, simplifying manufacturing logistics
Halogen-free & RoHS	Complies with IEC 61249-2-21 and EU RoHS Directive - suitable for environmentally regulated industrial and consumer products

Applications

High-Frequency DC/DC Converters	Snubber Circuits
Use Scenario: Secondary-side rectification in 300–600 kHz isolated flyback or forward converters powering telecom and server PSUs. IC Role / Device Role / Timing Role: Ultra-fast unidirectional current switch that minimizes reverse recovery energy loss during MOSFET turn-on transitions. Use Value: 25ns t_rr and 57nC Q_rr reduce switching losses by >30% versus standard fast rectifiers, improving full-load efficiency.	Use Scenario: RCD snubber network across primary-side MOSFETs in offline SMPS to suppress voltage spikes during turn-off. IC Role / Device Role / Timing Role: Fast-recovery clamp diode that conducts transient energy into the snubber capacitor with minimal delay and overshoot. Use Value: Low V_F (0.84 V) and fast t_rr ensure rapid turn-on and controlled energy dissipation, protecting MOSFETs from avalanche stress.
Automated Power Supply Assembly	Industrial AC-DC Front-Ends
Use Scenario: High-volume production of DIN-rail mounted AC-DC modules requiring zero-defect solder joint reliability. IC Role / Device Role / Timing Role: Surface-mount rectifier with wettable flank leads enabling 100% AOI verification of solder fillet formation. Use Value: J-STD-002 compliant matte tin plating and MSL Level 1 eliminate pre-bake steps and support standard reflow profiles.	Use Scenario: Input bridge or PFC boost diode in 1–3 kW industrial motor drives and PLC power supplies. IC Role / Device Role / Timing Role: 100V-rated, 4A-rated discrete rectifier handling continuous conduction mode (CCM) currents with 130A I_FSM surge margin. Use Value: R_θJL = 2.0°C/W allows direct thermal transfer to thick copper planes, sustaining 4A at T_A ≤ 70°C without forced air.

High-Frequency DC/DC Converters

Snubber Circuits

Use Scenario: Secondary-side rectification in 300–600 kHz isolated flyback or forward converters powering telecom and server PSUs.

IC Role / Device Role / Timing Role: Ultra-fast unidirectional current switch that minimizes reverse recovery energy loss during MOSFET turn-on transitions.

Use Value: 25ns t_rr and 57nC Q_rr reduce switching losses by >30% versus standard fast rectifiers, improving full-load efficiency.

Use Scenario: RCD snubber network across primary-side MOSFETs in offline SMPS to suppress voltage spikes during turn-off.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode that conducts transient energy into the snubber capacitor with minimal delay and overshoot.

Use Value: Low V_F (0.84 V) and fast t_rr ensure rapid turn-on and controlled energy dissipation, protecting MOSFETs from avalanche stress.

Automated Power Supply Assembly

Industrial AC-DC Front-Ends

Use Scenario: High-volume production of DIN-rail mounted AC-DC modules requiring zero-defect solder joint reliability.

IC Role / Device Role / Timing Role: Surface-mount rectifier with wettable flank leads enabling 100% AOI verification of solder fillet formation.

Use Value: J-STD-002 compliant matte tin plating and MSL Level 1 eliminate pre-bake steps and support standard reflow profiles.

Use Scenario: Input bridge or PFC boost diode in 1–3 kW industrial motor drives and PLC power supplies.

IC Role / Device Role / Timing Role: 100V-rated, 4A-rated discrete rectifier handling continuous conduction mode (CCM) currents with 130A I_FSM surge margin.

Use Value: R_θJL = 2.0°C/W allows direct thermal transfer to thick copper planes, sustaining 4A at T_A ≤ 70°C without forced air.

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-4EYH01-M3/45	V_RRM = 100V, I_F = 4A, t_rr = 35ns, TO-277A package, but higher V_F = 0.92V @ 4A	Higher conduction loss limits use in high-efficiency DC/DC; acceptable in snubbers where speed is secondary to cost	Select when budget constraints outweigh 8% conduction loss penalty and 10ns slower recovery is tolerable
ON Semiconductor MUR410EG	V_RRM = 100V, I_F = 4A, t_rr = 60ns, TO-220AC package - larger footprint, no wettable flanks, R_θJA = 50°C/W	Requires through-hole assembly and heatsinking; unsuitable for AOI-driven SMT lines or space-constrained layouts	Choose only for legacy through-hole designs or where TO-220 mechanical robustness is prioritized over density and manufacturability

Compared with VS-4EYH01-M3/45 and MUR410EG, PUUP4B delivers superior high-frequency efficiency via 25ns t_rr and 0.84V V_F, while its TO-277A wettable flank package supports automated optical inspection and compact board layouts not feasible with TO-220 or non-wettable alternatives.

Availability

PUUP4B is available at Aetrix Electronics and suitable for high-frequency DC/DC converters, snubber networks, and automated power supply assembly requiring stable component supply, consistent parametric performance, and J-STD-020 Level 1 moisture handling.

Supply support for PUUP4B 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 industrial, computing, and consumer markets since 1979.

The PUUP4B belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion systems where low Q_rr, tight V_F tolerance, and SMT manufacturability are critical.

FAQ

What is the maximum repetitive peak reverse voltage rating for PUUP4B?

The PUUP4B has a maximum repetitive peak reverse voltage (V_RRM) of 100 V, as specified in the Absolute Maximum Ratings table. This value is fixed for PUUP4B and differs from PUUP4D (200 V). Operation above 100 V risks irreversible breakdown and must be avoided in circuit design.

Does PUUP4B support automated optical inspection (AOI) during SMT assembly?

Yes, PUUP4B features wettable flank terminals per its TO-277A (SMPC4.6U) package specification. These side-wettable leads allow full solder joint inspection using standard AOI systems, ensuring zero-defect manufacturing in high-volume power supply lines.

What is the reverse recovery time (t_rr) of PUUP4B and under what test conditions is it measured?

The PUUP4B reverse recovery time is 25 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. This value is confirmed in the Electrical Specifications table and reflects performance optimized for >300 kHz switching frequencies.

Can PUUP4B be used in place of a standard fast recovery diode in a 12V/3A DC/DC output stage?

Yes, PUUP4B is well-suited for 12V/3A DC/DC output rectification due to its 4A I_F rating, 0.84V V_F at 4A, and 25ns t_rr. Its low forward voltage reduces conduction loss, and ultra-fast recovery minimizes switching noise - both critical for maintaining regulation and EMI compliance in compact converters.

What is the junction-to-lead thermal resistance (R_θJL) of PUUP4B and how does it impact thermal design?

The PUUP4B has a junction-to-lead thermal resistance (R_θJL) of 2.0°C/W under ideal heatsink conditions. This low value enables efficient heat transfer from the die directly to the PCB copper or external heatsink, allowing sustained 4A operation without forced airflow when properly mounted on ≥16 mm × 16 mm Cu pads.

PUUP4B 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):: 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 @ 100 V

Capacitance @ Vr, F:: 71pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMPC4.6U

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

PUUP4B FAQ

1.How can I place an order for PUUP4B through Aetrix?

Please submit a Request for Quotation (RFQ) for PUUP4B 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 PUUP4B reliable?

The price and inventory of PUUP4B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PUUP4B is usually 5 days.

3.What payment methods are accepted for PUUP4B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PUUP4B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PUUP4B?

PUUP4B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PUUP4B 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 PUUP4B?

For technical support, including PUUP4B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PUUP4B requirements.

6.How does Aetrix verify that PUUP4B is sourced from the original manufacturer or authorized distributors?

All PUUP4B 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 PUUP4B meets industry standards.

7.What is the process for return or replacement of PUUP4B?

All PUUP4B units undergo pre-shipment inspection (PSI). If there is an issue with PUUP4B, 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 PUUP4B part is unused and in its original packaging.

Return procedure for PUUP4B:

1.Submit a request within 90 days.

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

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