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

Taiwan Semiconductor Corporation PU3BC

Name: PU3BC
Brand: Taiwan Semiconductor Corporation
SKU: PU3BC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU3BC

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-214AB, SMC

Datasheet:: PU3BC.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:3,000

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Product details

Overview

PU3BC from Taiwan Semiconductor is a 100V, 3A ultra-fast surface-mount rectifier in DO-214AB (SMC) package, featuring 25 ns reverse recovery time, 0.86 V forward voltage at 3 A/25°C, and 85 A surge capability - used in high-frequency DC/DC converters and snubber circuits.

For engineers reviewing the PU3BC datasheet, PU3BC pinout, PU3BC application, or PU3BC 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 power conversion designs.

Technical Context

The PU3BC employs planar silicon technology optimized for ultra-fast switching with low Q_rr (51 nC) and minimal trr dispersion (23–25 ns), enabling efficient operation in hard-switched topologies above 100 kHz. Its single-die configuration and SMC package support automated placement while maintaining robust thermal performance on standard PCB copper pads.

Electrical behavior is characterized by low VF drift over temperature (0.73 V at 3 A/125°C), tight IR control (<2 µA @ 25°C), and stable CJ (47 pF at 1 MHz/4 V), making it suitable for snubbers requiring predictable capacitive loading and fast turn-off dynamics.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - maximum repetitive reverse blocking voltage; defines safe operating limit in DC/DC flyback or boost stages
I_F	3 A continuous - average forward current rating at T_L = 75°C on 16 mm × 16 mm Cu pad
t_rr	23–25 ns - ultra-fast recovery enables high-frequency switching without excessive switching loss or ringing
Q_rr	51 nC - low reverse recovery charge reduces diode-induced voltage spikes and EMI in snubber networks
R_θJL	14 °C/W - low junction-to-lead thermal resistance supports compact thermal design without heatsinks
V_F @ 3 A/25°C	0.86 V - low conduction loss improves efficiency in 12–48 V output DC/DC converters
I_FSM	85 A @ 8.3 ms - surge rating allows handling of transient inrush or fault currents without failure

Pinout & Package

DO-214AB (SMC) surface-mount package with cathode-indicating band; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 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 flyback secondary or buck freewheel path)
Cathode	Forward current exit / reverse blocking terminal	Marked by band; connects to output rail or snubber capacitor; blocks 100 V reverse voltage

Key Features

Feature	Design Value
Ultra-fast recovery	23–25 ns t_rr minimizes switching loss and EMI in >100 kHz DC/DC converters
Low Q_rr	51 nC enables clean turn-off in snubber circuits without voltage overshoot
High surge tolerance	85 A I_FSM supports reliable operation during line transients or startup surges
Thermal efficiency	R_θJL = 14 °C/W allows direct PCB heat sinking without thermal vias or external heatsinks
Automated assembly ready	Moisture sensitivity level 1 (J-STD-020) and matte tin leads ensure reflow compatibility and zero bake requirement

Applications

High-Frequency DC/DC Converter	Snubber Network
Use Scenario: Secondary-side rectification in 200–500 kHz isolated flyback or forward converters for telecom and industrial PSUs. IC Role / Device Role / Timing Role: Ultra-fast freewheeling rectifier replacing slower diodes to reduce switching losses and improve efficiency. Use Value: 25 ns t_rr and 0.86 V V_F cut conduction + recovery losses by ~18% vs. standard FR107 in 48 V output designs.	Use Scenario: RCD snubber across MOSFETs or IGBTs in motor drives and SMPS to clamp voltage spikes. IC Role / Device Role / Timing Role: Fast-recovery clamp diode that turns off before parasitic oscillation begins. Use Value: 51 nC Q_rr and 47 pF C_J suppress voltage overshoot within 30 ns, reducing snubber resistor stress.
AC-DC Input Rectification	Hold-Up Capacitor Charging Path
Use Scenario: Bridge rectifier input stage in universal-input (85–265 VAC) offline SMPS with PFC pre-regulator. IC Role / Device Role / Timing Role: High-voltage, high-surge discrete rectifier handling 100 V reverse stress and 85 A inrush. Use Value: 100 V V_RRM and 85 A I_FSM sustain repeated cold-start surges without degradation.	Use Scenario: Charging path for bulk hold-up capacitors after bridge rectification in industrial UPS and PLC power supplies. IC Role / Device Role / Timing Role: Low-V_F rectifier minimizing voltage drop during capacitor recharge cycles. Use Value: 0.73 V V_F at 3 A/125°C maintains <1.5% voltage loss across 100 ms recharge pulses.

High-Frequency DC/DC Converter

Snubber Network

Use Scenario: Secondary-side rectification in 200–500 kHz isolated flyback or forward converters for telecom and industrial PSUs.

IC Role / Device Role / Timing Role: Ultra-fast freewheeling rectifier replacing slower diodes to reduce switching losses and improve efficiency.

Use Value: 25 ns t_rr and 0.86 V V_F cut conduction + recovery losses by ~18% vs. standard FR107 in 48 V output designs.

Use Scenario: RCD snubber across MOSFETs or IGBTs in motor drives and SMPS to clamp voltage spikes.

IC Role / Device Role / Timing Role: Fast-recovery clamp diode that turns off before parasitic oscillation begins.

Use Value: 51 nC Q_rr and 47 pF C_J suppress voltage overshoot within 30 ns, reducing snubber resistor stress.

AC-DC Input Rectification

Hold-Up Capacitor Charging Path

Use Scenario: Bridge rectifier input stage in universal-input (85–265 VAC) offline SMPS with PFC pre-regulator.

IC Role / Device Role / Timing Role: High-voltage, high-surge discrete rectifier handling 100 V reverse stress and 85 A inrush.

Use Value: 100 V V_RRM and 85 A I_FSM sustain repeated cold-start surges without degradation.

Use Scenario: Charging path for bulk hold-up capacitors after bridge rectification in industrial UPS and PLC power supplies.

IC Role / Device Role / Timing Role: Low-V_F rectifier minimizing voltage drop during capacitor recharge cycles.

Use Value: 0.73 V V_F at 3 A/125°C maintains <1.5% voltage loss across 100 ms recharge pulses.

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	600 V V_RRM, 3 A, 35 ns t_rr, higher V_F (1.15 V @ 3 A)	Better suited for 400 V bus systems; less optimal for 100 V snubbers due to higher capacitance	Select when higher reverse voltage margin is required and 35 ns t_rr is acceptable
MBR3100	Schottky, 100 V, 3 A, 0.55 V V_F, no reverse recovery (t_rr = 0)	Lower conduction loss but limited to ≤125°C operation; unsuitable for 175°C ambient environments	Choose for low-loss, low-temp applications where junction temperature stays below 125°C

Compared with STTH3L06S and MBR3100, the PU3BC delivers optimal balance of 100 V rating, 25 ns speed, 175°C operation, and 0.86 V conduction loss - uniquely fitting high-reliability, high-temperature snubber and DC/DC roles where Schottky leakage or FRD sluggishness are unacceptable.

Availability

PU3BC is available at Aetrix Electronics and suitable for high-frequency DC/DC converters, snubber networks, and AC-DC input rectification requiring stable component supply, long-term lifecycle assurance, and RoHS/halogen-free compliance.

Supply support for PU3BC 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 industrial, computing, and power electronics markets since 1979.

The PU3BC belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in space-constrained, thermally demanding applications such as telecom PSUs and motor drive snubbers.

FAQ

What is the maximum junction temperature rating for the PU3BC?

The PU3BC has a maximum junction temperature (T_J) rating of +175°C, verified per absolute maximum ratings table. This allows operation in high-ambient environments like enclosed industrial power supplies. Derating curves confirm usable current down to –55°C storage, and thermal resistance values (R_θJL = 14 °C/W) support thermal design up to this limit when mounted on a 16 mm × 16 mm Cu pad. The PU3BC must not exceed this TJ under any steady-state or transient condition.

Does the PU3BC have a specified moisture sensitivity level (MSL)?

Yes, the PU3BC is rated at Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, meaning it can be stored indefinitely at ≤30°C/85% RH without baking prior to reflow. This eliminates pre-reflow bake steps in manufacturing, reducing process cost and risk of lead oxidation. The matte tin-plated leads also meet J-STD-002 solderability requirements, ensuring consistent wetting during standard Pb-free reflow profiles. This MSL rating applies specifically to the PU3BC in DO-214AB packaging.

What is the reverse recovery time (t_rr) of the PU3BC under typical operating conditions?

The PU3BC exhibits a reverse recovery time (t_rr) of 23 ns (typical) to 25 ns (max) under test conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A. At higher stress (I_F = 1.0 A, di/dt = 50 A/µs, V_R = 30 V), t_rr remains ≤31 ns. These values are measured per JEDEC standards and directly enable use in >200 kHz switching topologies. The PU3BC's t_rr is confirmed in the Electrical Specifications table and validated across temperature.

Is the PU3BC RoHS and halogen-free compliant?

Yes, the PU3BC is fully RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and all materials are certified to EU Directive 2011/65/EU and JEDEC JS709E. This compliance is explicitly stated in the FEATURES section of the official datasheet and applies to the entire PU3BC production lot. No exemptions are claimed, and the PU3BC carries full material declarations traceable to Taiwan Semiconductor's quality system.

How does the forward voltage (V_F) of the PU3BC vary with temperature and current?

The PU3BC's forward voltage decreases with rising junction temperature: at 3.0 A, V_F is 0.86 V (max) at 25°C and drops to 0.73 V (typ) at 125°C. This negative temperature coefficient improves thermal stability in parallel configurations. All V_F values are measured per pulse test conditions (PW = 0.3 ms), and the datasheet provides full curves (Fig.4) confirming monotonic behavior across –55°C to +175°C. This behavior is intrinsic to the PU3BC's planar silicon structure.

PU3BC Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-214AB, SMC

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-214AB (SMC)

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

PU3BC FAQ

1.How can I place an order for PU3BC through Aetrix?

Please submit a Request for Quotation (RFQ) for PU3BC 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 PU3BC reliable?

The price and inventory of PU3BC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU3BC is usually 5 days.

3.What payment methods are accepted for PU3BC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU3BC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU3BC?

PU3BC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU3BC 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 PU3BC?

For technical support, including PU3BC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU3BC requirements.

6.How does Aetrix verify that PU3BC is sourced from the original manufacturer or authorized distributors?

All PU3BC 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 PU3BC meets industry standards.

7.What is the process for return or replacement of PU3BC?

All PU3BC units undergo pre-shipment inspection (PSI). If there is an issue with PU3BC, 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 PU3BC part is unused and in its original packaging.

Return procedure for PU3BC:

1.Submit a request within 90 days.

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

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