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

Taiwan Semiconductor Corporation UF1J

Name: UF1J
Brand: Taiwan Semiconductor Corporation
SKU: UF1J
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UF1J

Manufacturer:: Taiwan Semiconductor Corporation

Category:: Single Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: UF1J.pdf

Description:: DIODE GEN PURP 600V 1A DO204AL

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

UF1J from Taiwan Semiconductor is a 600 V, 1 A glass-passivated high-efficiency ultrafast rectifier diode in DO-204AL (DO-41) package, featuring 75 ns reverse recovery time and 1.7 V forward voltage at 1 A, used in freewheeling paths of switching-mode power supplies.

For engineers reviewing the UF1J datasheet, UF1J pinout, UF1J application, or UF1J equivalent, key selection criteria include repetitive peak reverse voltage (600 V), soft recovery behavior, junction-to-lead thermal resistance (15 °C/W), AEC-Q101 qualification availability, and compatibility with 8.3 ms surge current (30 A) requirements.

Technical Context

The UF1J operates as a single-die, unidirectional silicon rectifier with cathode-band polarity indication and pure tin-plated leads compliant with J-STD-002 solderability. Its ultrafast recovery (75 ns) and soft reverse recovery waveform minimize switching losses and EMI in high-frequency converters.

Thermally, it supports continuous operation up to 150 °C junction temperature, with R_θJL = 15 °C/W enabling effective heat transfer to PCB copper or heatsink via lead conduction, and R_θJA = 60 °C/W for ambient-limited natural convection scenarios.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	600 V - maximum non-repetitive reverse blocking voltage before breakdown
I_F	1 A - average forward current rating under specified thermal conditions
I_FSM	30 A - peak surge current capability for 8.3 ms half-sine wave, critical for inrush handling
t_rr	75 ns - measured reverse recovery time at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A, defining switching speed
V_F	1.7 V - forward voltage drop at 1 A and 25 °C, directly impacting conduction loss and thermal load
R_θJL	15 °C/W - junction-to-lead thermal resistance, enabling accurate lead-mounted thermal modeling
C_J	17 pF - junction capacitance at 1 MHz and 4 V reverse bias, influencing high-frequency noise coupling

Pinout & Package

Package: DO-204AL (DO-41), axial-leaded, glass-passivated silicon die, cathode indicated by band, weight ≈ 0.330 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (unbanded end)	Forward current entry point	Connected to lower-potential side of circuit; must handle full 1 A DC and 30 A surge
Cathode (banded end)	Forward current exit / reverse blocking terminal	Connected to higher-potential node; blocks up to 600 V reverse; band enables visual polarity verification

Key Features

Feature	Design Value
Glass passivated junction	Enables stable long-term reliability and moisture resistance without hermetic sealing
Soft recovery characteristic	Reduces voltage overshoot and ringing during turn-off, lowering EMI filter burden
AEC-Q101 qualification option	Supports automotive-grade stress testing (HTOL, TC, HTRB) when ordered with "H" suffix
UL 94V-0 molding compound	Meets flammability safety requirement for enclosed power supply housings
JESD 201 Class 2 whisker resistance	Prevents tin whisker growth under thermal cycling, ensuring long-term solder joint integrity

Applications

DC–DC Converter Secondary Rectification	Switching Mode Inverter Freewheeling
Use Scenario: High-frequency isolated DC–DC converter output stage operating at 100–500 kHz. IC Role / Device Role / Timing Role: Output rectifier conducting unidirectional current during transformer secondary positive half-cycle. Use Value: 75 ns t_rr and soft recovery reduce switching losses and output voltage spikes, improving efficiency and reducing snubber component count.	Use Scenario: Inductive load commutation path in motor drive inverters or UPS systems. IC Role / Device Role / Timing Role: Freewheeling diode providing low-impedance return path when main switch turns off. Use Value: 600 V V_RRM withstands inductive kickback; 30 A I_FSM handles transient energy without failure.
Solar Microinverter Input Stage	Industrial AC–DC Power Supply PFC Boost Diode
Use Scenario: Input bridge rectification in compact solar microinverters with limited thermal mass. IC Role / Device Role / Timing Role: High-voltage input rectifier converting AC grid to DC bus prior to inverter stage. Use Value: 150 °C T_JMAX and 15 °C/W R_θJL allow reliable operation under sustained partial-load heating in sealed enclosures.	Use Scenario: Boost converter output diode in active PFC circuits operating at 65–100 kHz. IC Role / Device Role / Timing Role: Unidirectional current path isolating boost inductor from output capacitor during switch-off phase. Use Value: 1.7 V V_F balances conduction loss vs. 75 ns t_rr switching loss-optimized for mid-frequency PFC efficiency targets.

DC–DC Converter Secondary Rectification

Switching Mode Inverter Freewheeling

Use Scenario: High-frequency isolated DC–DC converter output stage operating at 100–500 kHz.

IC Role / Device Role / Timing Role: Output rectifier conducting unidirectional current during transformer secondary positive half-cycle.

Use Value: 75 ns t_rr and soft recovery reduce switching losses and output voltage spikes, improving efficiency and reducing snubber component count.

Use Scenario: Inductive load commutation path in motor drive inverters or UPS systems.

IC Role / Device Role / Timing Role: Freewheeling diode providing low-impedance return path when main switch turns off.

Use Value: 600 V V_RRM withstands inductive kickback; 30 A I_FSM handles transient energy without failure.

Solar Microinverter Input Stage

Industrial AC–DC Power Supply PFC Boost Diode

Use Scenario: Input bridge rectification in compact solar microinverters with limited thermal mass.

IC Role / Device Role / Timing Role: High-voltage input rectifier converting AC grid to DC bus prior to inverter stage.

Use Value: 150 °C T_JMAX and 15 °C/W R_θJL allow reliable operation under sustained partial-load heating in sealed enclosures.

Use Scenario: Boost converter output diode in active PFC circuits operating at 65–100 kHz.

IC Role / Device Role / Timing Role: Unidirectional current path isolating boost inductor from output capacitor during switch-off phase.

Use Value: 1.7 V V_F balances conduction loss vs. 75 ns t_rr switching loss-optimized for mid-frequency PFC efficiency targets.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STTH1R06U (STMicroelectronics)	Same V_RRM (600 V), identical I_F (1 A), but t_rr = 60 ns and V_F = 1.6 V at 25 °C	Better switching speed and slightly lower conduction loss; no AEC-Q101 option available	Select when prioritizing minimal reverse recovery loss over automotive qualification
ES1J (ON Semiconductor)	V_RRM = 600 V, I_F = 1 A, t_rr = 35 ns, V_F = 1.7 V, but R_θJL = 20 °C/W and no AEC-Q101 variant	Faster recovery enables higher frequency operation; higher thermal resistance limits power density	Select for space-constrained designs where 35 ns t_rr justifies trade-off in thermal performance

Compared with STTH1R06U and ES1J, the UF1J offers balanced ultrafast performance with AEC-Q101 qualification path and superior thermal conduction (15 °C/W), making it preferred for automotive and thermally demanding industrial power stages where reliability under thermal cycling is critical.

Availability

UF1J is available at Aetrix Electronics and suitable for DC–DC converters, switching mode inverters, and freewheeling applications requiring stable component supply, consistent parametric performance across production lots, and long-term lifecycle support.

Supply support for UF1J 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 for industrial and automotive markets.

The UF1J belongs to TSC's UF1x ultrafast rectifier family, engineered specifically for high-efficiency, high-reliability switching power conversion where soft recovery, thermal robustness, and AEC-Q101 compliance are required.

FAQ

What is the maximum junction temperature rating for UF1J?

The UF1J has a maximum junction temperature (T_JMAX) of +150 °C, verified per absolute maximum ratings table in the G2104 datasheet. This allows continuous operation in high-ambient environments such as enclosed power supplies or under-hood automotive modules when thermal design accounts for R_θJL = 15 °C/W. The UF1J must not exceed this limit to maintain reliability and parametric stability.

Does UF1J have AEC-Q101 qualification?

The base UF1J part is not AEC-Q101 qualified; however, the AEC-Q101 variant is available as UF1JH (ordering code with "H" suffix). Per TSC's ordering information, only parts marked with "H" undergo full AEC-Q101 stress testing including HTOL, temperature cycling, and HTRB. Standard UF1J is intended for industrial and commercial applications.

What is the reverse recovery time (t_rr) of UF1J and how is it measured?

The UF1J has a typical reverse recovery time (t_rr) of 75 ns, measured under conditions of I_F = 0.5 A, I_R = 1.0 A, and I_rr = 0.25 A, as specified in the electrical characteristics table. This value reflects the time required for minority carriers to clear after forward conduction, directly impacting switching loss and EMI generation in high-frequency topologies.

What does the marking "UF1J" on the device body indicate?

The marking "UF1J" on the UF1J device body identifies the exact voltage grade within the UF1x family: "J" corresponds to 600 V repetitive peak reverse voltage (V_RRM). Per the marking diagram and absolute maximum ratings table, UF1J is distinct from UF1A (50 V), UF1G (400 V), and UF1M (1000 V), ensuring correct identification during manual or automated assembly.

Is UF1J compatible with lead-free reflow soldering processes?

Yes, UF1J features pure tin-plated leads compliant with J-STD-002 for solderability, and its DO-204AL package is rated for standard lead-free reflow profiles (peak temperature ≤ 260 °C, 10-second dwell). The UL 94V-0 molding compound and glass passivation ensure mechanical and electrical integrity through multiple thermal cycles without delamination or parameter shift.

UF1J Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 600 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.7 V @ 1 A

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

Reverse Recovery Time (trr):: 75 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 600 V

Capacitance @ Vr, F:: 17pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

Operating Temperature - Junction:: -55°C ~ 150°C

UF1J FAQ

1.How can I place an order for UF1J through Aetrix?

Please submit a Request for Quotation (RFQ) for UF1J 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 UF1J reliable?

The price and inventory of UF1J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UF1J is usually 5 days.

3.What payment methods are accepted for UF1J?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UF1J transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UF1J?

UF1J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UF1J 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 UF1J?

For technical support, including UF1J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UF1J requirements.

6.How does Aetrix verify that UF1J is sourced from the original manufacturer or authorized distributors?

All UF1J 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 UF1J meets industry standards.

7.What is the process for return or replacement of UF1J?

All UF1J units undergo pre-shipment inspection (PSI). If there is an issue with UF1J, 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 UF1J part is unused and in its original packaging.

Return procedure for UF1J:

1.Submit a request within 90 days.

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

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