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

Taiwan Semiconductor Corporation PU1BFSH

Name: PU1BFSH
Brand: Taiwan Semiconductor Corporation
SKU: PU1BFSH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU1BFSH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: PU1BFSH.pdf

Description:: DIODE GEN PURP 100V 1A SOD128

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PU1BFSH from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier in SOD-128 package, featuring 25ns reverse recovery time, 0.84V forward voltage at 1A/25°C, and AEC-Q101 qualification for automotive-grade reliability. It serves as a high-efficiency freewheeling or snubber diode in DC/DC converters operating up to several hundred kHz.

For engineers reviewing the PU1BFSH datasheet, PU1BFSH pinout, PU1BFSH application, or PU1BFSH equivalent, key selection criteria include its 100V V_RRM, 45A I_FSM, 175°C T_J_MAX, low Q_rr of 27nC, and SOD-128 thermal performance (R_θJL = 17°C/W) - critical for compact, thermally constrained power stages.

Technical Context

The PU1BFSH employs planar junction technology to achieve ultra-fast switching with controlled reverse recovery characteristics. Its 19–25ns trr and 3.4A IRM under high di/dt conditions enable clean turn-off in hard-switched topologies without excessive ringing or voltage overshoot.

Designed for automotive and industrial power supplies, it operates across –55°C to +175°C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling direct placement on high-reliability PCBs without baking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse blocking voltage; defines safe operation in 48V bus-derived DC/DC stages.
I_F	1 A continuous - Rated average forward current at T_L = 115°C on 5mm × 5mm Cu pad; supports compact 1W–2W power blocks.
t_rr	19–25 ns - Measured under IF = 0.5A/1.0A, di/dt = 50–200A/µs; enables >500kHz switching with minimal commutation loss.
Q_rr	27 nC - Low stored charge reduces turn-off energy and EMI in flyback and active clamp circuits.
R_θJL	17 °C/W - Junction-to-lead thermal resistance; allows direct thermal coupling to PCB copper for passive cooling in space-constrained layouts.
V_F @ 1A/25°C	0.84 V (max 0.93 V) - Low conduction loss improves efficiency in low-voltage output rectification (e.g., 3.3V/5V rails).
I_R @ 100V/125°C	10 µA - Low leakage preserves hold-up time and minimizes standby power in offline SMPS.

Pinout & Package

Package: SOD-128 - Surface-mount plastic case with gull-wing leads, 5mm × 3.7mm footprint, 1.1mm height, UL 94V-0 rated molding compound, matte tin-plated terminals.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to switch node or transformer secondary; low-inductance path critical for fast recovery integrity.
Cathode	Forward current exit / reverse blocking terminal	Marked by cathode band; ties to output rail or ground return; must maintain clean layout to minimize parasitic ringing.

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive power modules requiring extended temperature cycling and mechanical shock robustness.
Ultra-fast trr (19–25 ns)	Reduces switching losses and EMI generation in high-frequency DC/DC converters above 300 kHz.
Low Q_rr (27 nC)	Minimizes reverse recovery energy dissipation and associated voltage spikes during turn-off transitions.
R_θJL = 17°C/W	Enables efficient heat transfer to PCB copper without heatsinks in 1A-class applications.
Moisture sensitivity Level 1	Permits direct placement from tape-and-reel without pre-baking - streamlines automated SMT assembly.

Applications

Automotive DC/DC Converters	Industrial Snubber Circuits
Use Scenario: Step-down conversion from 12V/24V battery to 3.3V/5V logic rails in ADAS ECUs and body control modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology, handling 1A peak load with minimal conduction loss. Use Value: 0.84V V_F and 27nC Q_rr reduce total power loss by ~12% vs. standard FR1 diodes, improving thermal margin at 105°C ambient.	Use Scenario: Clamp diode across MOSFET drain-source in motor drive inverters to suppress voltage spikes during IGBT/MOSFET turn-off. IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing inductive kickback energy with sub-25ns turn-off response. Use Value: 25ns t_rr and 3.4A I_RM limit voltage overshoot to <120V under 100A/µs di/dt, protecting 100V-rated switches.
High-Frequency Switching PSUs	Telecom Power Modules
Use Scenario: Secondary-side rectification in 500kHz+ LLC resonant converters for server VRMs and telecom rectifiers. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectification-assisted topology, leveraging low V_F and fast t_rr for efficiency optimization. Use Value: 19ns t_rr and 17°C/W R_θJL allow stable operation at 175°C junction temperature, supporting derating-free 1A continuous duty.	Use Scenario: Input bridge or OR-ing diode in redundant 48V intermediate bus architectures with hot-swap capability. IC Role / Device Role / Timing Role: High-reliability rectifier with AEC-Q101 qualification used in telecom base station power distribution units. Use Value: JESD201 Class 2 whisker resistance and –55°C to +175°C T_J rating ensure long-term stability in uncontrolled environmental enclosures.

Automotive DC/DC Converters

Industrial Snubber Circuits

Use Scenario: Step-down conversion from 12V/24V battery to 3.3V/5V logic rails in ADAS ECUs and body control modules.

IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology, handling 1A peak load with minimal conduction loss.

Use Value: 0.84V V_F and 27nC Q_rr reduce total power loss by ~12% vs. standard FR1 diodes, improving thermal margin at 105°C ambient.

Use Scenario: Clamp diode across MOSFET drain-source in motor drive inverters to suppress voltage spikes during IGBT/MOSFET turn-off.

IC Role / Device Role / Timing Role: Fast-recovery snubber diode absorbing inductive kickback energy with sub-25ns turn-off response.

Use Value: 25ns t_rr and 3.4A I_RM limit voltage overshoot to <120V under 100A/µs di/dt, protecting 100V-rated switches.

High-Frequency Switching PSUs

Telecom Power Modules

Use Scenario: Secondary-side rectification in 500kHz+ LLC resonant converters for server VRMs and telecom rectifiers.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous rectification-assisted topology, leveraging low V_F and fast t_rr for efficiency optimization.

Use Value: 19ns t_rr and 17°C/W R_θJL allow stable operation at 175°C junction temperature, supporting derating-free 1A continuous duty.

Use Scenario: Input bridge or OR-ing diode in redundant 48V intermediate bus architectures with hot-swap capability.

IC Role / Device Role / Timing Role: High-reliability rectifier with AEC-Q101 qualification used in telecom base station power distribution units.

Use Value: JESD201 Class 2 whisker resistance and –55°C to +175°C T_J rating ensure long-term stability in uncontrolled environmental enclosures.

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, I_F = 1A, t_rr = 35ns, VF = 1.15V @ 1A - higher voltage rating but slower and less efficient.	Used in 400V PFC front-ends; not optimized for 100V DC/DC where lower V_F and faster t_rr matter.	Select PU1BFSH when V_RRM ≤ 100V and efficiency at 1A matters more than overvoltage margin.
ES1J	V_RRM = 600V, I_F = 1A, t_rr = 35ns, VF = 1.7V @ 1A - significantly higher forward drop and slower recovery.	General-purpose fast recovery; lacks AEC-Q101, higher leakage, unsuitable for automotive thermal profiles.	PU1BFSH offers 0.84V vs. 1.7V V_F, 27nC vs. ~50nC Q_rr, and full automotive qualification - critical for mission-critical systems.

Compared with STTH1R06 and ES1J, PU1BFSH delivers superior efficiency (0.84V V_F), faster switching (19–25ns t_rr), lower stored charge (27nC Q_rr), and automotive-grade reliability - making it optimal for thermally dense, high-frequency 100V-class power stages where conduction and switching losses must be minimized.

Availability

PU1BFSH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and high-frequency switching PSUs requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant sourcing.

Supply support for PU1BFSH 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 devices, and MOSFETs.

The PU1BFSH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial environments where thermal robustness and fast recovery are essential.

FAQ

What is the maximum junction temperature rating for PU1BFSH?

The PU1BFSH has a maximum junction temperature (T_J_MAX) of +175°C, validated across its full operating range from –55°C to +175°C. This rating is supported by its planar die construction and SOD-128 package thermal design, allowing sustained 1A operation on standard PCB copper without forced air or heatsinking. The PU1BFSH maintains specified electrical parameters up to this limit.

Is PU1BFSH suitable for automotive applications?

Yes, PU1BFSH is AEC-Q101 qualified and tested per automotive stress standards including temperature cycling, humidity bias, and mechanical shock. Its SOD-128 package meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - enabling direct use in engine control units, ADAS power supplies, and body electronics without additional qualification. PU1BFSH is explicitly designed for automotive-grade reliability.

What is the reverse recovery time (t_rr) of PU1BFSH under typical operating conditions?

The PU1BFSH exhibits a reverse recovery time of 19ns (typical) at I_F = 1.0A, dI/dt = 50A/µs, and V_R = 30V, and up to 25ns under I_F = 0.5A, I_R = 1.0A, I_rr = 0.25A test conditions. These values are measured per JEDEC standards and confirm its suitability for >500kHz switching frequencies. The PU1BFSH's t_rr remains stable across –40°C to +125°C ambient.

Does PU1BFSH have a halogen-free and RoHS-compliant construction?

Yes, PU1BFSH is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound, lead frame, and plating materials meet both regulatory requirements without compromising thermal or electrical performance. The device carries no restricted substances above threshold limits, and its SOD-128 package is UL 94V-0 rated. PU1BFSH documentation confirms full compliance status.

What is the marking code printed on the PU1BFSH device body?

The PU1BFSH is marked "PU1BFS" on its top surface, followed by a date code and factory identifier per TSC's standard SOD-128 marking diagram. This 6-character marking distinguishes it from the 200V variant PU1DFSH (marked "PU1DFS"). The marking is laser-etched for permanence and readability under automated optical inspection. PU1BFSH's marking aligns with its ordering code and voltage rating.

PU1BFSH 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:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-128

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

PU1BFSH FAQ

1.How can I place an order for PU1BFSH through Aetrix?

Please submit a Request for Quotation (RFQ) for PU1BFSH 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 PU1BFSH reliable?

The price and inventory of PU1BFSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU1BFSH is usually 5 days.

3.What payment methods are accepted for PU1BFSH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU1BFSH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU1BFSH?

PU1BFSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU1BFSH 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 PU1BFSH?

For technical support, including PU1BFSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU1BFSH requirements.

6.How does Aetrix verify that PU1BFSH is sourced from the original manufacturer or authorized distributors?

All PU1BFSH 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 PU1BFSH meets industry standards.

7.What is the process for return or replacement of PU1BFSH?

All PU1BFSH units undergo pre-shipment inspection (PSI). If there is an issue with PU1BFSH, 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 PU1BFSH part is unused and in its original packaging.

Return procedure for PU1BFSH:

1.Submit a request within 90 days.

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

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