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

Taiwan Semiconductor Corporation PU1BFS

Name: PU1BFS
Brand: Taiwan Semiconductor Corporation
SKU: PU1BFS
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU1BFS

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: PU1BFS.pdf

Description:: 25NS, 1A, 100V, ULTRA FAST RECOV

Quantity:: RFQ Add To RFQ list

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Inventory:28,000

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Product details

Overview

PU1BFS from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier diode in SOD-128 package, featuring 25ns reverse recovery time, 0.84V forward voltage at 1A/25°C, and 45A surge current capability. It serves as a high-efficiency freewheeling or snubber diode in DC/DC converters operating up to several hundred kHz.

For engineers reviewing the PU1BFS datasheet, PU1BFS pinout, PU1BFS application, or PU1BFS equivalent, key selection criteria include its 100V V_RRM, low Q_rr of 27nC, thermal resistance R_θJL of 17°C/W, and SOD-128 footprint compatibility with automated assembly.

Technical Context

This single-die planar silicon rectifier is optimized for high-frequency switching applications where fast recovery and low conduction loss are critical. Its 19–25ns trr and 0.70V VF at 1A/125°C enable stable operation in synchronous rectification and snubber networks under thermal stress.

The device operates across –55°C to +175°C junction temperature range, with R_θJA = 75°C/W on standard 5mm × 5mm Cu pad PCBs. Moisture sensitivity level 1 (J-STD-020) and matte tin-plated leads ensure robust reflow solderability without preconditioning.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking range in 48V–72V bus snubbers
I_F	1 A continuous - Rated average forward current; supports 12W dissipation at 0.84V drop in compact SOD-128 layout
t_rr	19–25 ns - Measured under IF=0.5A/IR=1.0A/Irr=0.25A; enables >500kHz switching without excessive switching loss
Q_rr	27 nC - Reverse recovery charge; directly impacts turn-off loss in hard-switched topologies
R_θJL	17 °C/W - Junction-to-lead thermal resistance; allows direct thermal path to PCB copper for passive cooling
I_FSM	45 A - Non-repetitive peak surge current (8.3ms); withstands inrush and fault transients in power supplies
T_J max	+175 °C - Maximum junction temperature; supports operation in sealed industrial enclosures without forced air

Pinout & Package

Package: SOD-128 - Surface-mount plastic case with gull-wing leads, 5.0mm × 3.0mm footprint, 1.0mm height, UL 94V-0 rated molding compound, cathode indicated by band.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to switch node or inductor output; must handle 1A DC + 45A surge
Cathode	Forward current exit / reverse blocking terminal	Connected to output rail or ground return; polarity marked by visible band on package

Key Features

Feature	Design Value
Ultra-fast recovery	t_rr ≤ 25 ns ensures minimal switching loss in 300–1000 kHz DC/DC stages
Low forward voltage	V_F = 0.84 V @ 1A/25°C reduces conduction loss vs. standard FR diodes (typically >1.1V)
High surge robustness	I_FSM = 45 A (8.3ms) supports repeated cold-start and overload events without degradation
Thermally efficient package	R_θJL = 17 °C/W enables >0.8W steady-state dissipation on minimal copper area
Automated assembly ready	Moisture sensitivity level 1 and J-STD-002 compliant terminations eliminate bake requirements pre-reflow

Applications

Switch-Mode Power Supply Output Rectification	Snubber Network Diode
Use Scenario: Secondary-side rectification in isolated 24–48V output DC/DC converters operating at 300–600 kHz. IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; recovers before next switching cycle. Use Value: 25ns t_rr and 27nC Q_rr reduce turn-off loss and EMI generation compared to 75ns general-purpose diodes.	Use Scenario: RCD snubber across primary-side MOSFET in flyback or forward converters. IC Role / Device Role / Timing Role: Fast clamping diode that conducts only during voltage spike, then blocks rapidly. Use Value: 100V V_RRM and sub-30ns recovery prevent false triggering and minimize snubber energy loss.
High-Frequency Inverter Auxiliary Rectification	Industrial DC Link Protection
Use Scenario: Auxiliary bias supply rectification in motor drive inverters switching at 10–20 kHz with high dv/dt. IC Role / Device Role / Timing Role: Input rectifier feeding isolated gate driver supply; exposed to fast-rising common-mode transients. Use Value: 175°C T_Jmax and 19ns t_rr ensure reliability under repeated thermal cycling and high-frequency stress.	Use Scenario: Reverse-polarity protection and transient clamping on 24–48V DC input rails in PLC modules and I/O cards. IC Role / Device Role / Timing Role: Unidirectional current path with fast blocking response to backfeed or surge events. Use Value: 45A I_FSM and 10µA IR at 125°C provide margin against load dump and hot-swap transients.

Switch-Mode Power Supply Output Rectification

Snubber Network Diode

Use Scenario: Secondary-side rectification in isolated 24–48V output DC/DC converters operating at 300–600 kHz.

IC Role / Device Role / Timing Role: Freewheeling diode conducting during MOSFET off-time; recovers before next switching cycle.

Use Value: 25ns t_rr and 27nC Q_rr reduce turn-off loss and EMI generation compared to 75ns general-purpose diodes.

Use Scenario: RCD snubber across primary-side MOSFET in flyback or forward converters.

IC Role / Device Role / Timing Role: Fast clamping diode that conducts only during voltage spike, then blocks rapidly.

Use Value: 100V V_RRM and sub-30ns recovery prevent false triggering and minimize snubber energy loss.

High-Frequency Inverter Auxiliary Rectification

Industrial DC Link Protection

Use Scenario: Auxiliary bias supply rectification in motor drive inverters switching at 10–20 kHz with high dv/dt.

IC Role / Device Role / Timing Role: Input rectifier feeding isolated gate driver supply; exposed to fast-rising common-mode transients.

Use Value: 175°C T_Jmax and 19ns t_rr ensure reliability under repeated thermal cycling and high-frequency stress.

Use Scenario: Reverse-polarity protection and transient clamping on 24–48V DC input rails in PLC modules and I/O cards.

IC Role / Device Role / Timing Role: Unidirectional current path with fast blocking response to backfeed or surge events.

Use Value: 45A I_FSM and 10µA IR at 125°C provide margin against load dump and hot-swap transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06	V_RRM = 600V, t_rr = 35ns, VF = 1.15V @ 1A - higher voltage rating but slower and higher loss	Suitable for 400V bus systems; not optimal for 100V-class high-frequency designs due to excess V_RRM and loss	Select when 600V blocking is required; avoid if minimizing conduction/switching loss at 100V is priority
ES1D	V_RRM = 200V, t_rr = 35ns, VF = 0.92V @ 1A - same package but slower and higher VF than PU1BFS	Acceptable for <300kHz applications; insufficient for aggressive 500kHz+ snubber or synchronous rectifier use	Choose for cost-sensitive legacy designs; PU1BFS preferred where trr < 25ns and VF < 0.85V are critical

Compared with STTH1R06 and ES1D, PU1BFS delivers superior high-frequency efficiency via lower Q_rr (27nC vs. ≥45nC), faster t_rr (19–25ns vs. ≥35ns), and lower VF (0.84V vs. ≥0.92V), making it optimal for thermally constrained, high-switching-frequency DC/DC stages.

Availability

PU1BFS is available at Aetrix Electronics and suitable for DC/DC converter design, snubber network implementation, and high-frequency inverter auxiliary power supply requiring stable component supply and consistent SOD-128 footprint availability.

Supply support for PU1BFS 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 PU1BFS belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in space-constrained surface-mount applications where thermal performance and recovery speed are decisive.

FAQ

What is the maximum junction temperature rating for PU1BFS?

The PU1BFS has a maximum junction temperature (T_J) rating of +175°C, verified per absolute maximum ratings table. This allows sustained operation in sealed industrial enclosures or high-ambient environments without derating below 1A until case temperature exceeds ~120°C, given its R_θJL of 17°C/W.

Does PU1BFS have a specified reverse recovery time under standard test conditions?

Yes, PU1BFS specifies t_rr = 25 ns under IF = 0.5A, IR = 1.0A, Irr = 0.25A, and t_rr = 19 ns under IF = 1.0A, di/dt = 200A/µs, VR = 100V. These values are measured per JEDEC standards and confirmed in the Electrical Specifications section of the A2210 datasheet.

Is PU1BFS compatible with lead-free reflow soldering processes?

Yes, PU1BFS features matte tin-plated leads compliant with J-STD-002 and moisture sensitivity level 1 per J-STD-020, enabling compatibility with standard Pb-free reflow profiles (peak 260°C) without baking or special handling.

What is the marking code printed on the PU1BFS device body?

The PU1BFS is marked with "PU1BFS" on its top surface, as confirmed in the Absolute Maximum Ratings table and Marking Diagram section of the A2210 datasheet. The marking includes no additional date or factory codes in the base ordering variant.

How does the thermal resistance of PU1BFS compare between junction-to-lead and junction-to-ambient?

PU1BFS has R_θJL = 17°C/W and R_θJA = 75°C/W on a 5mm × 5mm Cu pad PCB. This 4.4× difference confirms that effective heat transfer relies on conduction through the leads into the PCB copper, not ambient convection - underscoring the need for adequate thermal pad design.

PU1BFS Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-128

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

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

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 930 mV @ 1 A

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

Reverse Recovery Time (trr):: 25 ns

Current - Reverse Leakage @ Vr:: 2 µA @ 100 V

Capacitance @ Vr, F:: 19pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

PU1BFS FAQ

1.How can I place an order for PU1BFS through Aetrix?

Please submit a Request for Quotation (RFQ) for PU1BFS 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 PU1BFS reliable?

The price and inventory of PU1BFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU1BFS is usually 5 days.

3.What payment methods are accepted for PU1BFS?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU1BFS transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU1BFS?

PU1BFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU1BFS 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 PU1BFS?

For technical support, including PU1BFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU1BFS requirements.

6.How does Aetrix verify that PU1BFS is sourced from the original manufacturer or authorized distributors?

All PU1BFS 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 PU1BFS meets industry standards.

7.What is the process for return or replacement of PU1BFS?

All PU1BFS units undergo pre-shipment inspection (PSI). If there is an issue with PU1BFS, 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 PU1BFS part is unused and in its original packaging.

Return procedure for PU1BFS:

1.Submit a request within 90 days.

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

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