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

Taiwan Semiconductor Corporation PU3BFSH

Name: PU3BFSH
Brand: Taiwan Semiconductor Corporation
SKU: PU3BFSH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU3BFSH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-128

Datasheet:: PU3BFSH.pdf

Description:: DIODE GEN PURP 100V 3A SOD128

Quantity:: RFQ Add To RFQ list

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Inventory:9,099

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Product details

Overview

PU3BFSH from Taiwan Semiconductor is a 100V, 3A ultra-fast surface-mount rectifier diode in SOD-128 package, featuring 25ns reverse recovery time, 0.86V forward voltage at 3A/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 at high switching frequencies.

For engineers reviewing the PU3BFSH datasheet, PU3BFSH pinout, PU3BFSH application, or PU3BFSH equivalent, key selection criteria include its 100V V_RRM, 85A I_FSM, 14°C/W R_θJL, 47pF junction capacitance, and SOD-128 thermal performance on PCB-mounted 5mm × 5mm copper pads.

Technical Context

This single-die planar silicon rectifier is optimized for fast switching with low Q_rr (51nC) and low trr (23–25ns), enabling reduced switching losses in hard-switched topologies. Its TJ max of 175°C and R_θJA of 74°C/W support operation in thermally constrained automotive and industrial power stages.

The device uses matte tin-plated leads compliant with J-STD-002 solderability and meets JESD201 Class 2 whisker resistance. Polarity is marked by a cathode band, and moisture sensitivity is rated Level 1 per J-STD-020 - eliminating bake requirements prior to reflow.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; defines safe blocking capability in 12–48V bus applications
I_F	3 A - Continuous average forward current at T_L = 90°C; supports compact 3A DC/DC output stages
t_rr	23–25 ns - Measured under IF = 0.5A/1.0A, di/dt = 50–200A/µs; enables >500kHz switching without excessive turn-off loss
V_F	0.86 V @ 3A, 25°C - Low conduction loss improves efficiency in high-duty-cycle buck or flyback secondaries
Q_rr	51 nC - Quantified reverse recovery charge; directly impacts EMI and MOSFET turn-on loss in synchronous rectification
R_θJL	14 °C/W - Junction-to-lead thermal resistance; enables direct thermal coupling to PCB copper for passive cooling
I_FSM	85 A @ 8.3ms - Non-repetitive surge rating; withstands inrush and fault currents in automotive load-dump scenarios

Pinout & Package

SOD-128 is a flat, surface-mount plastic package with two gull-wing leads, optimized for high-power density and automated placement. The cathode is marked by a visible band on the body end.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); requires adequate copper pour for thermal dissipation
Cathode	Forward current exit / reverse blocking terminal	Marked by band; ties to output rail or ground return; critical for snubber placement and EMI filtering layout

Key Features

Feature	Design Value
AEC-Q101 qualified	Validated for automotive power electronics per stress test requirements - supports under-hood and EPS applications
Ultra-fast trr ≤ 25 ns	Reduces switching transition overlap loss and associated heat generation in high-frequency SMPS
R_θJL = 14°C/W	Enables >2W continuous power dissipation with <30°C temperature rise above lead temperature on standard FR4
Moisture Sensitivity Level 1	Zero floor-life limitation; compatible with standard SMT reflow without dry-pack or baking
Halogen-free & RoHS compliant	Meets IEC 61249-2-21 and EU RoHS directives - suitable for green manufacturing and export compliance

Applications

Automotive DC/DC Converters	Industrial Snubber Circuits
Use Scenario: Step-down conversion in 12V/48V dual-battery systems for ADAS ECUs and infotainment modules. IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck regulator; handles reverse recovery during high-side FET turn-on. Use Value: 25ns t_rr and 51nC Q_rr minimize cross-conduction loss and EMI generation at 300–600kHz switching.	Use Scenario: Clamp transient energy across IGBTs or MOSFETs in motor drives and UPS inverters. IC Role / Device Role / Timing Role: Fast recovery snubber diode absorbing inductive kickback during switching transitions. Use Value: Low V_F (0.86V) and high I_FSM (85A) ensure reliable clamping without thermal runaway during repeated surges.
High-Frequency Flyback Secondary	Telecom Power Rectification
Use Scenario: Output rectification in compact 30–60W flyback adapters for PoE-powered devices. IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output; operates in discontinuous conduction mode. Use Value: 47pF C_J and 74°C/W R_θJA reduce capacitive coupling noise and sustain stable output under ambient temperatures up to 85°C.	Use Scenario: Primary-side auxiliary supply rectification in telecom base station power modules. IC Role / Device Role / Timing Role: Input-stage rectifier converting AC-derived bias rails; subjected to line transients and thermal cycling. Use Value: TJ range of –55°C to +175°C and AEC-Q101 qualification provide long-term reliability in uncontrolled environmental enclosures.

Automotive DC/DC Converters

Industrial Snubber Circuits

Use Scenario: Step-down conversion in 12V/48V dual-battery systems for ADAS ECUs and infotainment modules.

IC Role / Device Role / Timing Role: Freewheeling diode in synchronous buck regulator; handles reverse recovery during high-side FET turn-on.

Use Value: 25ns t_rr and 51nC Q_rr minimize cross-conduction loss and EMI generation at 300–600kHz switching.

Use Scenario: Clamp transient energy across IGBTs or MOSFETs in motor drives and UPS inverters.

IC Role / Device Role / Timing Role: Fast recovery snubber diode absorbing inductive kickback during switching transitions.

Use Value: Low V_F (0.86V) and high I_FSM (85A) ensure reliable clamping without thermal runaway during repeated surges.

High-Frequency Flyback Secondary

Telecom Power Rectification

Use Scenario: Output rectification in compact 30–60W flyback adapters for PoE-powered devices.

IC Role / Device Role / Timing Role: Unidirectional current path delivering regulated DC output; operates in discontinuous conduction mode.

Use Value: 47pF C_J and 74°C/W R_θJA reduce capacitive coupling noise and sustain stable output under ambient temperatures up to 85°C.

Use Scenario: Primary-side auxiliary supply rectification in telecom base station power modules.

IC Role / Device Role / Timing Role: Input-stage rectifier converting AC-derived bias rails; subjected to line transients and thermal cycling.

Use Value: TJ range of –55°C to +175°C and AEC-Q101 qualification provide long-term reliability 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
STTH3L06S	V_RRM = 600V, I_F = 3A, t_rr = 35ns, SOD-128	Higher blocking voltage but slower recovery; less efficient at >300kHz	Select when 600V isolation is required over 100V; avoid where trr-driven loss dominates
ES3D	V_RRM = 200V, I_F = 3A, t_rr = 35ns, DO-214AB	Different package (larger footprint, higher R_θJA), same voltage grade as PU3DFSH variant	Choose for legacy DO-214AB board compatibility; not drop-in for SOD-128 layout

Compared with STTH3L06S and ES3D, PU3BFSH delivers superior high-frequency efficiency due to its 23–25ns t_rr and 14°C/W R_θJL, making it optimal for space-constrained, thermally demanding 100V automotive and industrial DC/DC designs.

Availability

PU3BFSH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial snubber circuits, and high-frequency flyback secondary rectification requiring stable component supply and AEC-Q101-compliant sourcing.

Supply support for PU3BFSH 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 automotive, industrial, and consumer markets since 1979.

The PU3BFSH belongs to TSC's AEC-Q101-qualified ultra-fast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in thermally aggressive environments.

FAQ

What is the maximum repetitive peak reverse voltage rating for PU3BFSH?

The PU3BFSH has a V_RRM rating of 100 V, verified per absolute maximum ratings table in the official datasheet. This defines the highest reverse voltage the diode can block repeatedly without avalanche breakdown. Exceeding this value risks irreversible damage, especially under transient conditions or elevated junction temperatures.

Is PU3BFSH suitable for automotive applications?

Yes, PU3BFSH is AEC-Q101 qualified and specified for operation from –55°C to +175°C junction temperature. Its construction, testing, and packaging meet automotive reliability standards, making PU3BFSH appropriate for engine control units, ADAS power supplies, and body electronics where thermal robustness and long-term stability are required.

What is the forward voltage drop of PU3BFSH at full rated current?

PU3BFSH exhibits a typical forward voltage of 0.86 V at I_F = 3.0 A and T_J = 25°C, with a maximum of 0.93 V under the same conditions. At elevated temperature (T_J = 125°C), V_F drops to 0.73 V, reflecting the negative temperature coefficient of silicon PN junctions.

Does PU3BFSH have a defined reverse recovery time, and how is it measured?

Yes, PU3BFSH specifies t_rr = 23 ns (typical) and ≤25 ns (max), measured under IF = 0.5A, IR = 1.0A, Irr = 0.25A per JEDEC standard test conditions. An alternate condition (IF = 1.0A, di/dt = 50A/µs, VR = 30V) yields 31 ns - confirming consistent ultra-fast behavior across operating points.

What package type does PU3BFSH use, and what are its mechanical advantages?

PU3BFSH uses the SOD-128 surface-mount package - a compact, gull-wing leaded outline with high thermal efficiency. Its 14°C/W R_θJL enables direct heat transfer to PCB copper, and its Level 1 moisture sensitivity eliminates pre-reflow baking, streamlining high-volume SMT assembly for PU3BFSH in production environments.

PU3BFSH 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):: 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:: SOD-128

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

PU3BFSH FAQ

1.How can I place an order for PU3BFSH through Aetrix?

Please submit a Request for Quotation (RFQ) for PU3BFSH 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 PU3BFSH reliable?

The price and inventory of PU3BFSH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU3BFSH is usually 5 days.

3.What payment methods are accepted for PU3BFSH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU3BFSH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU3BFSH?

PU3BFSH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU3BFSH 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 PU3BFSH?

For technical support, including PU3BFSH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU3BFSH requirements.

6.How does Aetrix verify that PU3BFSH is sourced from the original manufacturer or authorized distributors?

All PU3BFSH 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 PU3BFSH meets industry standards.

7.What is the process for return or replacement of PU3BFSH?

All PU3BFSH units undergo pre-shipment inspection (PSI). If there is an issue with PU3BFSH, 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 PU3BFSH part is unused and in its original packaging.

Return procedure for PU3BFSH:

1.Submit a request within 90 days.

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

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