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

Taiwan Semiconductor Corporation PU1BLW

Name: PU1BLW
Brand: Taiwan Semiconductor Corporation
SKU: PU1BLW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PU1BLW

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: SOD-123W

Datasheet:: PU1BLW.pdf

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

Quantity:: RFQ Add To RFQ list

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Inventory:20,000

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Product details

Overview

PU1BLW from Taiwan Semiconductor is a 1A, 100V ultra-fast surface-mount rectifier diode in SOD-123W 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 PU1BLW datasheet, PU1BLW pinout, PU1BLW application, or PU1BLW equivalent, key selection criteria include V_RRM = 100V, I_F = 1A, t_rr ≤ 25ns, thermal resistance R_θJA = 80°C/W, and SOD-123W footprint compatibility with automated placement.

Technical Context

This single-die planar silicon rectifier is optimized for high-frequency switching applications where low forward voltage drop and fast reverse recovery minimize conduction and switching losses. Its 19ns typical t_rr and 27nC Q_rr support efficient operation in hard-switched topologies.

The device operates across –55°C to +175°C junction temperature range, with R_θJL = 18°C/W enabling effective heat transfer to PCB copper pads. Moisture sensitivity level 1 ensures robust reflow compatibility without baking.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	100 V - Maximum repetitive reverse voltage before breakdown; sets upper limit for snubber or clamp circuit design
I_F	1 A - Continuous average forward current rating at T_A = 25°C on standard PCB pad
t_rr	25 ns max - Reverse recovery time under IF = 0.5A, IR = 1.0A, Irr = 0.25A; critical for minimizing switching loss in SMPS
V_F	0.84 V max at 1A/25°C - Low conduction loss improves efficiency in high-duty-cycle rectification
I_FSM	45 A - Non-repetitive surge current handling for startup or fault transients (t = 8.3ms)
T_J max	+175°C - High junction temperature rating enables compact thermal design in space-constrained layouts
C_J	19 pF - Junction capacitance at 1MHz/4V; impacts high-frequency noise and EMI filter design

Pinout & Package

Package: SOD-123W - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode indicated by band. Weight: 0.015g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current entry point	Connected to lower-potential node (e.g., switch node in buck converter); polarity must match PCB silkscreen
Cathode	Forward current exit / reverse blocking terminal	Connected to higher-potential node (e.g., output rail); cathode band identifies orientation during automated placement

Key Features

Feature	Design Value
Ultra-fast recovery	t_rr ≤ 25 ns enables use in >500 kHz DC/DC converters without excessive switching loss
Low V_F at high temperature	V_F = 0.70 V typ at 1A/125°C maintains efficiency under thermal stress
SOD-123W footprint	Standardized 2.7 × 1.6 mm outline supports pick-and-place compatibility and IPC-7351 compliance
Moisture sensitivity level 1	No bake required before reflow; simplifies manufacturing and reduces process risk
Halogen-free & RoHS	Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally regulated end equipment

Applications

Buck Converter Freewheeling Diode	Snubber Network Diode
Use Scenario: Used as the low-side freewheeling path in non-synchronous buck regulators delivering 3.3–12 V at up to 2 A. IC Role / Device Role / Timing Role: Rectifies inductive flyback energy during high-side switch off-time; conducts for ~50–90% of switching period. Use Value: 0.84 V V_F minimizes conduction loss; 25 ns t_rr prevents reverse recovery shoot-through in adjacent MOSFETs.	Use Scenario: Placed across power MOSFETs or IGBTs in flyback or forward converters to absorb turn-off voltage spikes. IC Role / Device Role / Timing Role: Clamps transient overvoltage within 100 V rating while absorbing stored inductive energy. Use Value: 45 A I_FSM withstands short-duration surge currents; low Q_rr (27 nC) limits snubber dissipation.
High-Frequency DC/DC Isolation Diode	EMI-Sensitive Signal Path Clamp
Use Scenario: Output rectifier in isolated 1–3 W flyback adapters operating at 250–500 kHz switching frequency. IC Role / Device Role / Timing Role: Converts high-frequency AC from transformer secondary to regulated DC output. Use Value: 19 pF C_J reduces capacitive coupling into feedback loop; 175°C T_Jmax supports sealed enclosure thermal profiles.	Use Scenario: Reverse-polarity protection and transient clamping on low-voltage sensor inputs (e.g., 3.3 V analog front-end). IC Role / Device Role / Timing Role: Blocks reverse voltage and shunts ESD/transient events above 100 V to ground. Use Value: 2 µA max I_R at 25°C ensures minimal leakage error; cathode-band marking guarantees correct orientation in signal-path layout.

Buck Converter Freewheeling Diode

Snubber Network Diode

Use Scenario: Used as the low-side freewheeling path in non-synchronous buck regulators delivering 3.3–12 V at up to 2 A.

IC Role / Device Role / Timing Role: Rectifies inductive flyback energy during high-side switch off-time; conducts for ~50–90% of switching period.

Use Value: 0.84 V V_F minimizes conduction loss; 25 ns t_rr prevents reverse recovery shoot-through in adjacent MOSFETs.

Use Scenario: Placed across power MOSFETs or IGBTs in flyback or forward converters to absorb turn-off voltage spikes.

IC Role / Device Role / Timing Role: Clamps transient overvoltage within 100 V rating while absorbing stored inductive energy.

Use Value: 45 A I_FSM withstands short-duration surge currents; low Q_rr (27 nC) limits snubber dissipation.

High-Frequency DC/DC Isolation Diode

EMI-Sensitive Signal Path Clamp

Use Scenario: Output rectifier in isolated 1–3 W flyback adapters operating at 250–500 kHz switching frequency.

IC Role / Device Role / Timing Role: Converts high-frequency AC from transformer secondary to regulated DC output.

Use Value: 19 pF C_J reduces capacitive coupling into feedback loop; 175°C T_Jmax supports sealed enclosure thermal profiles.

Use Scenario: Reverse-polarity protection and transient clamping on low-voltage sensor inputs (e.g., 3.3 V analog front-end).

IC Role / Device Role / Timing Role: Blocks reverse voltage and shunts ESD/transient events above 100 V to ground.

Use Value: 2 µA max I_R at 25°C ensures minimal leakage error; cathode-band marking guarantees correct orientation in signal-path layout.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR110ES	V_RRM = 100 V, t_rr = 35 ns, V_F = 0.92 V @ 1A - slower recovery and higher V_F	Higher switching loss in >300 kHz designs; suitable for cost-sensitive <200 kHz applications	Select when lower unit cost outweighs efficiency loss and thermal margin is ample
Vishay VS-1EWH01-M3/5AT	V_RRM = 100 V, t_rr = 20 ns, V_F = 0.87 V @ 1A - slightly faster but higher forward drop	Better high-frequency performance but requires thermal derating above 125°C ambient	Prefer for highest-frequency designs where 5 ns t_rr advantage justifies tighter V_F trade-off

Compared with MUR110ES and VS-1EWH01-M3/5AT, PU1BLW delivers the best balance of low V_F (0.84 V), fast t_rr (25 ns), and wide T_J range (–55°C to +175°C), making it optimal for thermally constrained, medium-to-high-frequency DC/DC stages.

Availability

PU1BLW is available at Aetrix Electronics and suitable for buck converters, snubber networks, high-frequency DC/DC isolation stages, and EMI-sensitive signal clamping requiring stable component supply and J-STD-020 Level 1 moisture handling.

Supply support for PU1BLW 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 semiconductor manufacturer specializing in discrete power devices, including rectifiers, TVS diodes, and MOSFETs, with global distribution and AEC-Q200 qualified products.

The PU1BLW belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in consumer, industrial, and computing power supplies.

FAQ

What is the maximum junction temperature rating for PU1BLW?

The PU1BLW has a maximum junction temperature (T_J) rating of +175°C, verified per absolute maximum ratings table in the official Taiwan Semiconductor datasheet Version A2210. This allows reliable operation in thermally demanding environments such as enclosed power adapters or high-density DC/DC modules where ambient temperatures exceed 85°C. The PU1BLW maintains specified electrical parameters up to this limit when thermal design accounts for R_θJA = 80°C/W.

Does PU1BLW have a defined pinout, and how is polarity identified?

Yes, PU1BLW has a two-terminal pinout: anode and cathode. Polarity is unambiguously indicated by a visible cathode band on the SOD-123W package body. The cathode terminal connects to the higher-potential node in circuit operation and must align with the corresponding PCB silkscreen mark. No internal pin numbering applies - only functional terminal identification matters for this discrete diode.

What is the reverse recovery time specification for PU1BLW, and under what test conditions?

The PU1BLW reverse recovery time (t_rr) is specified as ≤25 ns under test conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, per the Electrical Specifications table in the Taiwan Semiconductor datasheet. A second condition yields t_rr = 34 ns at I_F = 1.0 A, di/dt = 50 A/µs, and V_R = 30 V. These values confirm its suitability for high-frequency switching applications.

Is PU1BLW compliant with RoHS and halogen-free standards?

Yes, PU1BLW is RoHS compliant and halogen-free per IEC 61249-2-21, as explicitly stated in the FEATURES section of the Taiwan Semiconductor datasheet. The device uses matte tin-plated leads and UL 94V-0 molding compound, satisfying environmental requirements for consumer, industrial, and computing end equipment without exemptions.

What is the marking code printed on the PU1BLW device body?

The marking code on the PU1BLW device body is "U1BLW", as confirmed in the Absolute Maximum Ratings table of the Taiwan Semiconductor datasheet. This 5-character laser marking appears adjacent to the cathode band and is used for traceability and visual verification during assembly and inspection. No date code or factory identifier is included in the primary marking.

PU1BLW Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: SOD-123W

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-123W

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

PU1BLW FAQ

1.How can I place an order for PU1BLW through Aetrix?

Please submit a Request for Quotation (RFQ) for PU1BLW 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 PU1BLW reliable?

The price and inventory of PU1BLW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU1BLW is usually 5 days.

3.What payment methods are accepted for PU1BLW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU1BLW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PU1BLW?

PU1BLW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PU1BLW 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 PU1BLW?

For technical support, including PU1BLW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU1BLW requirements.

6.How does Aetrix verify that PU1BLW is sourced from the original manufacturer or authorized distributors?

All PU1BLW 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 PU1BLW meets industry standards.

7.What is the process for return or replacement of PU1BLW?

All PU1BLW units undergo pre-shipment inspection (PSI). If there is an issue with PU1BLW, 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 PU1BLW part is unused and in its original packaging.

Return procedure for PU1BLW:

1.Submit a request within 90 days.

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

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