My Inquiry
My Account
Taiwan Semiconductor Corporation PU3BFS
- Part No.:
- PU3BFS
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- SOD-128
- Datasheet:
-
PU3BFS.pdf
- Description:
- 25NS, 3A, 100V, ULTRA FAST RECOV
- Quantity:
- Payment:
- Shipping:
Inventory:28,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
PU3BFS 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 85A surge current capability. It serves as a high-efficiency freewheeling or snubber diode in DC/DC converters operating above 100kHz.
For engineers reviewing the PU3BFS datasheet, PU3BFS pinout, PU3BFS application, or PU3BFS equivalent, key selection criteria include VRRM=100V, IF=3A, trr≤25ns, RθJA=74°C/W, and SOD-128 thermal performance on 5mm×5mm Cu pad.
Technical Context
The PU3BFS employs planar silicon technology to achieve low conduction loss and fast switching behavior. Its 25ns reverse recovery time and 51nC reverse recovery charge enable operation in high-frequency hard-switched topologies without excessive switching loss or voltage overshoot.
Thermal design is supported by RθJL=14°C/W and RθJC=19°C/W ratings measured on standard PCB test board. The device 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 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 100 V - Maximum repetitive reverse blocking voltage; defines safe DC/peak AC voltage rating in rectifier or snubber use |
| IF | 3 A - Continuous forward current rating at TA=25°C; derates linearly above 25°C per Fig.1 |
| trr | 25 ns - Measured at IF=0.5A, IR=1.0A, Irr=0.25A; enables <100kHz–1MHz switching with low EMI |
| VF | 0.86 V max at IF=3A, TJ=25°C - Low conduction loss improves efficiency in high-current DC/DC stages |
| IFSM | 85 A - Non-repetitive surge current for 8.3ms half-sine; supports inrush and fault transient handling |
| RθJA | 74 °C/W - Junction-to-ambient thermal resistance on 5mm×5mm Cu pad; determines heatsinking requirement |
| CJ | 47 pF - Junction capacitance at 1MHz, VR=4V; impacts high-frequency switching node ringing |
Pinout & Package
PU3BFS uses the SOD-128 surface-mount package: molded epoxy case meeting UL 94V-0, matte tin-plated leads solderable per J-STD-002, cathode indicated by band, weight ≈0.028g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck sync rectifier or snubber return) |
| Cathode (banded end) | Forward current exit / reverse blocking terminal | Connected to higher-potential node (e.g., output rail or clamp voltage reference); polarity critical for correct rectification |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast recovery (trr ≤25ns) | Reduces switching loss and voltage spikes in high-frequency DC/DC converters and active clamps |
| Low VF (0.86V max @3A) | Lowers conduction loss and thermal load compared to standard FRDs, enabling smaller heatsinks |
| SOD-128 package with RθJL=14°C/W | Enables direct PCB copper pad thermal coupling for improved power dissipation without external heatsink |
| J-STD-020 Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking-ideal for high-volume automated assembly |
Applications
| Buck Converter Freewheeling Diode | Active Clamp Snubber Diode |
|---|---|
Use Scenario: Used as the low-side freewheeling diode in non-synchronous buck regulators delivering 3A at >200kHz switching frequency. IC Role / Device Role / Timing Role: Provides unidirectional current path during high-side MOSFET off-time; recovers before next switching cycle to minimize reverse conduction loss. Use Value: 25ns trr prevents tail current overlap with high-side switch turn-on, reducing shoot-through risk and improving efficiency by ≥1.2% vs. 50ns FRD. | Use Scenario: Placed in the resonant clamp loop of flyback or LLC converters to absorb leakage inductance energy. IC Role / Device Role / Timing Role: Conducts clamp current during transformer reset phase; must recover rapidly to avoid voltage doubling on clamp capacitor. Use Value: 51nC Qrr and 25ns trr limit clamp ringback amplitude and reduce stress on primary MOSFET and clamp capacitor. |
| High-Frequency PFC Boost Diode | Industrial DC Link Protection Diode |
Use Scenario: Positioned as the boost rectifier in continuous-conduction-mode (CCM) PFC stages operating at 65–133kHz. IC Role / Device Role / Timing Role: Rectifies high-frequency AC input after boost inductor; blocks reverse voltage during switch conduction. Use Value: 100V VRRM and 85A IFSM support 230VAC nominal input with 30% line surge margin; low CJ minimizes EMI generation. | Use Scenario: Installed across DC bus terminals in motor drives or UPS systems to prevent reverse polarity damage during maintenance or battery swap. IC Role / Device Role / Timing Role: Acts as a polarity protection element; conducts only during fault condition with minimal forward drop. Use Value: 0.86V VF at 3A ensures <2.6W dissipation during sustained fault, compatible with thermal shutdown thresholds of adjacent controllers. |
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 | VRRM=600V, trr=35ns, VF=1.15V @3A - higher voltage rating but slower and higher loss | Not suitable for 100V-class DC/DC where low VF and fast trr dominate efficiency | Select PU3BFS when optimizing for 100V, high-frequency, low-loss operation; STTH3L06S only if 600V blocking is required |
| ES3D | VRRM=200V, trr=35ns, VF=0.92V @3A - higher VRRM but slower and less efficient than PU3BFS | Acceptable for 200V snubbers but suboptimal for 100V, high-efficiency buck freewheeling | PU3BFS preferred for 100V designs demanding best-in-class trr and VF; ES3D may be used only if 200V rating is mandatory |
Compared with STTH3L06S and ES3D, PU3BFS delivers superior high-frequency efficiency due to its 25ns trr and 0.86V VF, making it optimal for 100V DC/DC and snubber circuits where switching loss and thermal management are critical.
Availability
PU3BFS is available at Aetrix Electronics and suitable for high-frequency DC/DC converters, active clamp snubbers, and industrial DC link protection requiring stable component supply and consistent parametric performance across production lots.
Supply support for PU3BFS 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, MOSFETs, and LED drivers.
The PU3BFS belongs to TSC's ultra-fast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in compact surface-mount form factors.
FAQ
What is the maximum junction temperature rating for PU3BFS?
The PU3BFS has a maximum junction temperature (TJ) rating of +175°C, with operational range from –55°C to +175°C. This wide thermal envelope allows reliable deployment in industrial and automotive under-hood environments where ambient temperatures exceed 105°C, provided PCB thermal design maintains junction temperature within this limit during full-load operation.
Does PU3BFS have a specified reverse recovery charge (Qrr) value?
Yes, the PU3BFS specifies Qrr = 51 nC under conditions of IF = 3.0A, dI/dt = 200A/µs, and VR = 100V. This value is critical for estimating switching losses and voltage overshoot in snubber and freewheeling applications, and is measurably lower than alternatives like ES3D (Qrr ≈ 68 nC), contributing to PU3BFS's high-frequency advantage.
Is PU3BFS RoHS and halogen-free compliant?
Yes, PU3BFS is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin plated to meet J-STD-002 solderability requirements. These compliance attributes make PU3BFS suitable for consumer, industrial, and medical-grade electronics where regulatory adherence is mandatory.
What is the marking code printed on the PU3BFS device body?
The PU3BFS device is marked with "PU3BFS" as the ordering code, along with date code (YW) and factory code (F) per the marking diagram in the datasheet. This direct part-number marking enables unambiguous visual identification on the SOD-128 body and supports traceability during automated optical inspection (AOI) and field failure analysis.
How does the thermal resistance of PU3BFS compare between junction-to-lead and junction-to-ambient?
PU3BFS specifies RθJL = 14°C/W and RθJA = 74°C/W, both measured on a 5mm × 5mm Cu pad test board. The 5.3× lower RθJL confirms highly effective thermal conduction through the leads into the PCB copper, meaning thermal performance is strongly dependent on PCB copper area and layer stack-up-not just ambient airflow.
PU3BFS 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
PU3BFS FAQ
1.How can I place an order for PU3BFS through Aetrix?
Please submit a Request for Quotation (RFQ) for PU3BFS 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 PU3BFS reliable?
The price and inventory of PU3BFS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PU3BFS is usually 5 days.
3.What payment methods are accepted for PU3BFS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PU3BFS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PU3BFS?
PU3BFS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PU3BFS 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 PU3BFS?
For technical support, including PU3BFS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PU3BFS requirements.
6.How does Aetrix verify that PU3BFS is sourced from the original manufacturer or authorized distributors?
All PU3BFS 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 PU3BFS meets industry standards.
7.What is the process for return or replacement of PU3BFS?
All PU3BFS units undergo pre-shipment inspection (PSI). If there is an issue with PU3BFS, 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 PU3BFS part is unused and in its original packaging.
Return procedure for PU3BFS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
PU3BFS Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
