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

Taiwan Semiconductor Corporation PU3BB

Name: PU3BB
Brand: Taiwan Semiconductor Corporation
SKU: PU3BB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU3BB

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: PU3BB.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

PU3BB from Taiwan Semiconductor is a 100V, 3A ultra-fast surface-mount rectifier in DO-214AA (SMB) package, featuring 23 ns reverse recovery time, 0.86 V forward voltage at 3.0A/25°C, and 85 A surge current capability-designed for high-frequency switching power supplies and snubber circuits.

For engineers reviewing the PU3BB datasheet, PU3BB pinout, PU3BB application, or PU3BB equivalent, key selection criteria include repetitive peak reverse voltage (100 V), thermal resistance (R_θJL = 14 °C/W), junction temperature range (–55 to +175 °C), and RoHS/halogen-free compliance for industrial and automotive-grade power conversion designs.

Technical Context

The PU3BB employs planar silicon technology to achieve ultra-fast recovery with low Q_rr (51 nC) and minimal reverse recovery current (I_RM = 4.9 A), enabling efficient operation in hard-switched DC/DC converters and clamp/snubber networks where di/dt exceeds 200 A/µs.

Its DO-214AA (SMB) package supports automated placement (MSL Level 1), features matte tin-plated leads per J-STD-002, and delivers R_θJA = 71 °C/W on a 10 mm × 10 mm Cu pad-optimized for thermally constrained PCB layouts without heatsinking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse blocking voltage; defines safe operating limit in flyback/clamp topologies
I_F	3 A continuous - Average forward current rating at T_A = 25°C; derates linearly above 75°C ambient
t_rr	23 ns - Measured at I_F = 3.0 A, dI/dt = 200 A/µs, V_R = 100 V; enables >500 kHz switching
V_F	0.86 V @ 3.0 A, 25°C - Low conduction loss improves efficiency in high-duty-cycle rectification
I_FSM	85 A @ t = 8.3 ms - Surge withstand capability for inrush and transient overload protection
T_J max	+175 °C - High junction temperature rating allows operation in sealed enclosures or under thermal stress
R_θJL	14 °C/W - Low junction-to-lead thermal resistance enables direct PCB copper thermal path without solder mask

Pinout & Package

DO-214AA (SMB) surface-mount package with cathode band marking; two-terminal device (anode and cathode) in standard SMB outline per JEDEC DO-214AA.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential side of circuit (e.g., switch node in flyback secondary)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or snubber capacitor positive node

Key Features

Feature	Design Value
Ultra-fast recovery	t_rr = 23 ns ensures minimal switching loss and EMI in >300 kHz SMPS
Low Q_rr	51 nC reduces tail current and associated gate drive stress in synchronous rectifier control
High I_FSM	85 A surge rating supports robustness against line transients and startup surges
Halogen-free & RoHS	Complies with IEC 61249-2-21 and EU RoHS Directive for green manufacturing
MSL Level 1	No floor life limitation; suitable for standard SMT reflow without baking

Applications

Switch-Mode Power Supply Rectification	Snubber Network Diode
Use Scenario: Secondary-side rectification in 100–300 W offline flyback or forward converters operating at 200–500 kHz. IC Role / Device Role / Timing Role: Unidirectional current steering and energy transfer during switch off-time; critical for output voltage regulation and efficiency. Use Value: 0.86 V V_F and 23 ns t_rr reduce conduction and switching losses, improving full-load efficiency by ≥0.8% vs. standard fast recovery diodes.	Use Scenario: Clamp diode in RCD snubber across MOSFET drain-source in high-voltage DC/DC stages. IC Role / Device Role / Timing Role: Fast turn-off to absorb leakage inductance energy before MOSFET voltage overshoot exceeds V_RRM. Use Value: 85 A I_FSM and 23 ns t_rr prevent snap-off failure and minimize voltage spike amplitude during high-dI/dt events.
DC/DC Converter Output Stage	High-Frequency Inverter Freewheeling
Use Scenario: Output rectification in isolated 48 V–12 V telecom or server DC/DC modules with tight thermal budgets. IC Role / Device Role / Timing Role: Conducts load current during transformer secondary conduction phase; blocks reverse voltage during primary switch conduction. Use Value: R_θJL = 14 °C/W enables direct thermal coupling to PCB copper, maintaining T_J < 125°C at 3 A without heatsink.	Use Scenario: Freewheeling path in 20–100 kHz half-bridge inverters driving inductive loads (e.g., motor drives, induction heating). IC Role / Device Role / Timing Role: Provides low-loss return path for inductive current when main switches are off; must recover before next commutation edge. Use Value: 51 nC Q_rr limits reverse recovery charge injection into gate drivers, reducing spurious turn-on risk in high-side FETs.

Switch-Mode Power Supply Rectification

Snubber Network Diode

Use Scenario: Secondary-side rectification in 100–300 W offline flyback or forward converters operating at 200–500 kHz.

IC Role / Device Role / Timing Role: Unidirectional current steering and energy transfer during switch off-time; critical for output voltage regulation and efficiency.

Use Value: 0.86 V V_F and 23 ns t_rr reduce conduction and switching losses, improving full-load efficiency by ≥0.8% vs. standard fast recovery diodes.

Use Scenario: Clamp diode in RCD snubber across MOSFET drain-source in high-voltage DC/DC stages.

IC Role / Device Role / Timing Role: Fast turn-off to absorb leakage inductance energy before MOSFET voltage overshoot exceeds V_RRM.

Use Value: 85 A I_FSM and 23 ns t_rr prevent snap-off failure and minimize voltage spike amplitude during high-dI/dt events.

DC/DC Converter Output Stage

High-Frequency Inverter Freewheeling

Use Scenario: Output rectification in isolated 48 V–12 V telecom or server DC/DC modules with tight thermal budgets.

IC Role / Device Role / Timing Role: Conducts load current during transformer secondary conduction phase; blocks reverse voltage during primary switch conduction.

Use Value: R_θJL = 14 °C/W enables direct thermal coupling to PCB copper, maintaining T_J < 125°C at 3 A without heatsink.

Use Scenario: Freewheeling path in 20–100 kHz half-bridge inverters driving inductive loads (e.g., motor drives, induction heating).

IC Role / Device Role / Timing Role: Provides low-loss return path for inductive current when main switches are off; must recover before next commutation edge.

Use Value: 51 nC Q_rr limits reverse recovery charge injection into gate drivers, reducing spurious turn-on risk in high-side FETs.

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-M3/45	100 V V_RRM, 3 A I_F, t_rr = 25 ns, DO-214AA, but higher V_F (0.95 V @ 3 A)	Slightly higher conduction loss; same snubber/SMPS use cases	Prefer PU3BB where <0.87 V V_F is required for efficiency-critical designs
ON Semiconductor MUR310EG	100 V V_RRM, 3 A I_F, t_rr = 35 ns, DO-201AD (axial), not surface-mount	Through-hole only; incompatible with automated SMT assembly	Select PU3BB for SMB-compatible, MSL Level 1 production lines requiring no manual insertion

Compared with VS-3EYH01-M3/45 and MUR310EG, the PU3BB offers superior forward voltage and SMT compatibility-making it optimal for space-constrained, high-efficiency, high-volume power supply designs where thermal performance and assembly yield are critical.

Availability

PU3BB is available at Aetrix Electronics and suitable for high-frequency switching power supplies, DC/DC converters, and snubber circuits requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for PU3BB 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 markets.

The PU3BB belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-frequency power conversion systems demanding low Q_rr, tight V_F tolerance, and robust surge immunity in compact SMB packages.

FAQ

What is the maximum repetitive peak reverse voltage rating for PU3BB?

The PU3BB has a maximum repetitive peak reverse voltage (V_RRM) of 100 V, verified per its absolute maximum ratings table. This rating defines the highest reverse-biased voltage the device can block repeatedly without breakdown. Operating above 100 V risks irreversible avalanche failure. The PU3BB datasheet confirms this value applies exclusively to the PU3BB variant-not the PU3DB (200 V) version.

Does PU3BB support lead-free reflow soldering processes?

Yes, the PU3BB supports lead-free reflow soldering per J-STD-002. Its matte tin-plated leads are rated for peak temperatures up to 260°C, and its moisture sensitivity level is MSL Level 1-meaning no baking is required prior to assembly. The device's DO-214AA (SMB) package is qualified for standard Pb-free reflow profiles used in high-volume SMT lines.

What is the typical reverse recovery time (t_rr) of PU3BB under realistic switching conditions?

The PU3BB exhibits a typical reverse recovery time (t_rr) of 23 ns when tested at I_F = 3.0 A, dI/dt = 200 A/µs, and V_R = 100 V-conditions representative of hard-switched SMPS operation. This value is confirmed in the electrical specifications section and is lower than the 31 ns measured at lower dI/dt (50 A/µs), reflecting its optimized ultra-fast recovery behavior under high-stress switching.

Can PU3BB be used as a direct replacement for MUR310 in existing designs?

No, PU3BB is not a direct replacement for MUR310 due to package and pinout incompatibility: PU3BB uses DO-214AA (SMB), while MUR310 uses DO-201AD (axial). Though both are 100 V, 3 A ultra-fast rectifiers, the PU3BB requires PCB layout changes. For drop-in SMT alternatives, consider VS-3EYH01-M3/45-but verify V_F and thermal design impact.

What is the junction-to-ambient thermal resistance (R_θJA) of PU3BB on a standard test board?

The PU3BB has a junction-to-ambient thermal resistance (R_θJA) of 71 °C/W when mounted on a 10 mm × 10 mm copper pad PCB per JEDEC standards. This value assumes no additional heatsinking and reflects worst-case natural convection. For improved thermal performance, designers may increase copper area or add thermal vias-though R_θJL = 14 °C/W enables efficient heat transfer directly to the PCB lead frame.

PU3BB 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):: 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:: DO-214AA (SMB)

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

PU3BB FAQ

1.How can I place an order for PU3BB through Aetrix?

Please submit a Request for Quotation (RFQ) for PU3BB 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 PU3BB reliable?

The price and inventory of PU3BB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU3BB is usually 5 days.

3.What payment methods are accepted for PU3BB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU3BB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU3BB?

PU3BB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU3BB 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 PU3BB?

For technical support, including PU3BB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU3BB requirements.

6.How does Aetrix verify that PU3BB is sourced from the original manufacturer or authorized distributors?

All PU3BB 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 PU3BB meets industry standards.

7.What is the process for return or replacement of PU3BB?

All PU3BB units undergo pre-shipment inspection (PSI). If there is an issue with PU3BB, 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 PU3BB part is unused and in its original packaging.

Return procedure for PU3BB:

1.Submit a request within 90 days.

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

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