3sk41 Datasheet =link= 【2026】

is a specialized N-channel silicon dual-gate MOSFET primarily used for high-frequency applications like VHF/UHF amplifiers and mixers. Often manufactured by companies like

, it is known for its ability to handle high-speed switching while maintaining low noise. Jotrin Electronics Key Specifications & Features

The 3SK41 is designed for high-performance RF stages. Below are the typical highlights found in its technical datasheet : N-Channel Dual-Gate MOSFET. : Typically housed in a

(metal can) package, which provides excellent shielding for RF stability. High Gain & Low Noise

: Ideal for front-end receiver stages where sensitivity is critical. Applications VHF/UHF amplifiers.

Balanced mixers (often used in amateur radio equipment modifications to reduce noise and overload). General-purpose high-speed switching. Censtry.com Why the Dual-Gate Design?

The "dual-gate" architecture is what makes the 3SK41 stand out for RF work. The second gate allows for easy Automatic Gain Control (AGC)

implementation. By varying the voltage on Gate 2, you can control the amplifier's gain without significantly affecting the input impedance or tuning, which is a major advantage in radio receiver design. Censtry.com Sourcing & Replacements

Because the 3SK41 is an older, often "obsolete" part, it is frequently sought after by hobbyists and engineers for repairing vintage radio gear. AliExpress Where to find : It is still stocked by specialized distributors like Jotrin Electronics Equivalents

: In many circuits, it can be part of a broader series of "3SK" transistors (like the 3SK35 or 3SK40) depending on the specific voltage and gain requirements of your project. Jotrin Electronics Are you looking to use this for a new RF design 3SK41 - NEC/HITACHI/MOTOROLA - Jotrin

Title: 3SK41 Datasheet and Information

Introduction: The 3SK41 is a JFET (Junction Field-Effect Transistor) used in various electronic circuits. If you're looking for information on this component, you've come to the right place. Below, we'll provide an overview of the 3SK41, its features, and its datasheet.

Features:

Type: JFET
Application: The 3SK41 can be used in amplifier circuits, switch circuits, and other applications where low noise and high input impedance are required.

Datasheet: Unfortunately, without access to a specific datasheet from a reliable source like a manufacturer or distributor, we can't provide detailed specifications here. However, typically, a datasheet for a JFET like the 3SK41 would include:

Absolute Maximum Ratings: Such as maximum drain-source voltage (Vds), gate-source voltage (Vgs), and power dissipation (Pd).
Electrical Characteristics: Including parameters like drain current (Id), gate-source cutoff voltage (Vgs(off)), and the drain-source on-resistance.
Typical Characteristics: Graphs showing how the device's characteristics vary with temperature and other conditions.

Where to Find the Datasheet: For detailed and accurate information, we recommend checking with:

Electronic Component Distributors: Websites like Digi-Key, Mouser, or Newark often have datasheets available for download.
Manufacturer's Website: Look for the official website of the manufacturer. If you know the company that produces the 3SK41, their site should have a datasheet.
Datasheet Archives: There are websites dedicated to hosting datasheets for a wide range of components.

Specifications (if available): Without a current datasheet, we can't confirm the exact specifications of the 3SK41. For JFETs in general:

Package: Typically comes in small signal packages like TO-92.
Polarity: N-channel.

Conclusion: The 3SK41 JFET is a component used in various applications requiring high input impedance and low noise. For precise specifications and to ensure compatibility with your application, consult the datasheet from a reputable source.

Please provide more context if you need a more detailed guide or have specific questions about using the 3SK41 in a circuit.

The 3SK41 is an N-channel dual-gate MOSFET primarily designed for high-frequency applications, specifically for VHF/UHF RF amplification and mixing in television tuners and radio receivers.

Due to its age, it is frequently encountered in vintage "hybrid" transceivers (like Kenwood models) and is often replaced with more modern components for better performance. Key Technical Specifications

While exact datasheet values can vary slightly by manufacturer (e.g., NEC, Hitachi, or Motorola), the standard parameters for this type of MOSFET include: 3sk41 datasheet

Type: N-Channel Silicon Dual-Gate MOS Field-Effect Transistor.

Configuration: 4-pin package (Source, Gate 1, Gate 2, Drain). Typical Applications: VHF/UHF TV Tuner RF Amplifiers. High-frequency mixers. General-purpose high-frequency signal processing. Key Performance Metrics:

Low Noise: Designed to minimize internal noise, often cited as a reason for its use in balanced mixer stages.

High Gain: Provides significant amplification in the RF stage to improve receiver sensitivity. Common Applications & Use Cases

Radio Modifications: Hobbyists often replace the 3SK41 in vintage rigs to achieve better sensitivity (up to 6dB improvement) and lower background noise.

Signal Stability: Its dual-gate design allows for efficient automatic gain control (AGC) or local oscillator injection without compromising stability. Sourcing & Replacements

As the 3SK41 is considered a legacy or "hard-to-find" component, it is mostly available through specialized distributors like Jotrin Electronics or Veswin.

Modern Equivalents: In many RF circuits, common substitutes include the 3SK35 series or contemporary SMD dual-gate MOSFETs, though re-biasing the circuit is often required for optimal performance. 3SK41 Datasheet, PDF - ALLDATASHEET.COM

is a vintage N-channel dual-gate MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) primarily used in high-frequency applications like VHF/UHF radio amplification. Technical Overview Device Type: Dual-gate MOSFET (Silicon N-channel). Key Manufacturers: Originally produced by Application:

It was a staple in radio frequency (RF) circuits, specifically for VHF/UHF amplifiers and mixers in televisions and FM tuners. Design Advantage:

The dual-gate structure allows for superior gain control (AGC) and high stability by reducing the internal capacitance between the drain and the primary gate. www.jotrin.ru The "Deep Story": A Relic of the Analog Era

The 3SK41 represents a pivotal chapter in the history of consumer electronics: The Golden Age of RF:

In the 1970s and 80s, components like the 3SK41 were the "brain" behind the clear signal reception of color televisions and high-fidelity FM radios. Obsolescence:

As the world shifted from analog to digital (SDRs and integrated circuits), discrete dual-gate MOSFETs like the 3SK41 became

. Today, they are "New Old Stock" (NOS) treasures sought after by hobbyists restoring vintage ham radios or high-end tuners. The Component Hunt:

For modern engineers, finding a 3SK41 often involves scouring specialized distributors like , as these parts are no longer in mass production. Common Substitutes:

If you are working on a project and cannot find a 3SK41, modern equivalents like the or older substitutes like the

are often recommended for their similar low-noise performance. www.jotrin.ru Quick Specs Summary Description Silicon (Si) Configuration Dual-Gate (for AGC/Mixing) Typically CAN-4 or similar through-hole Current Life Obsolete / Hard-to-find for this part, or are you looking for a specific supplier to buy one? 3SK41 - NEC/HITACHI/MOTOROLA - Jotrin Electronics

The 3SK41 is a high-performance N-channel dual-gate MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) primarily used in radio frequency (RF) applications. While some older records may misidentify it as a relay, it is most recognized in amateur radio and signal processing for its fast switching and low noise characteristics. Key Technical Specifications

The following specifications are common for the 3SK41 dual-gate MOSFET: Type: N-channel dual-gate MOS field-effect transistor. Package: Typically found in a CAN-4 (metal can) package. Type: JFET Application: The 3SK41 can be used

Primary Application: RF amplifiers, balanced mixers, and signal converters in communication equipment. Key Features:

Dual-Gate Construction: Allows for improved AGC (Automatic Gain Control) characteristics and lower cross-modulation. Low Noise: Optimized for high-frequency sensitivity.

Fast Switching: Suitable for high-speed power management and signal switching. Common Applications

RF Amplifiers: Often used in receiver front-ends to improve sensitivity and selectivity.

Balanced Mixers: Employed in radio stages to reduce internal noise and prevent front-end overload.

Control Circuits: Used for general-purpose signal conversion and switching in alarms and security systems. Datasheet Resources

You can access the full technical PDF files through these sources:

Alldatasheet: Provides various versions of the PDF datasheet from multiple manufacturers.

Veswin: Contains detailed information on pinouts, circuit diagrams, and equivalent components.

Jotrin: Offers factory information and application notes for brands like NEC, Hitachi, and Motorola. 3SK41 - NEC/HITACHI/MOTOROLA - Jotrin

However, I can guide you on how to find datasheets for electronic components:

Manufacturer's Website: The best place to start is the official website of the component's manufacturer. If you know the manufacturer, you can directly search for the part number on their website.
Datasheet Search Engines: Websites like DigiKey, Mouser, and Newark often have comprehensive datasheet search functions. You can enter the part number and find the datasheet, along with information on availability and pricing.
Google Search: A simple Google search with the part number and the term "datasheet" can often lead you to the right document. For example, searching for "3sk41 datasheet" might yield results from various electronic component distributors or manufacturer websites.
Component Databases: Websites like Alldatasheet, Datasheet catalog, or Electronics Datasheet.com can also be useful resources.

If you can provide more details about the component, such as:

The type of component (e.g., transistor, voltage regulator)
The manufacturer (if known)

I could try to offer more specific guidance or resources to help you find the datasheet you're looking for.

Lifespan and reliability considerations

Avoid repeated gate overvoltage and high temperature cycling; both accelerate degradation.
Keep operating junction temperature low; mount with good copper and avoid covering can with insulating material.
Use ESD precautions in handling: MOSFET gates are sensitive.

1. Concept Overview

This feature utilizes the high-speed switching characteristics and voltage handling of the 3SK41 to create a Soft-Start Mechanism for AC induction motors or high-intensity lighting systems (such as industrial halogen lamps).

Instead of applying full voltage instantly (which causes high inrush current and mechanical stress), this feature gradually ramps up the voltage delivered to the load using Pulse Width Modulation (PWM).

Part 7: Handling and Testing Tips

Because the 3SK41 is a depletion-mode MOSFET, it is "normally on" with VGS=0V. A multimeter in diode mode will not test it properly. Here is how to test from the 3SK41 datasheet suggestions: common substitutes include the 3SK40

Gate Integrity: Measure resistance between Gate 1 and Source. Expect >10MΩ. Any reading below 1MΩ indicates a gate rupture from ESD.
Drain-Source Diode: There is no internal diode. Resistance should be high both ways (megohms) when not biased.
Functional Test: Build a simple common-source stage. With VGS=0V, you should see 5-25mA drain current. If current is 0mA, the device is open.

Historical Note: Many 3SK41s fail due to "purple plague" corrosion in the TO-72 can after 30+ years. If your device passes DC tests but has no RF gain, replace it.

Conclusion

The 3SK41 datasheet reveals a component that was far ahead of its time. With its 20V breakdown, 200mW dissipation, and 3dB noise figure, it enabled affordable, high-performance VHF radios for decades. While you shouldn't use it in a new mass-production design, understanding the 3SK41 is essential for restoring classic Sony, Kenwood, and Icom receivers.

If you are a hobbyist, grab a few 3SK41s from surplus stores before they vanish entirely. For new projects, pivot to the BF998 or 3SK299. But for pure vintage authenticity, the 3SK41 remains a small, metal-can legend.

Useful Search Terms to Continue:

3SK41 S-parameters
3SK41 SPICE model
BF981 vs 3SK41 comparison
TO-72 dual gate MOSFET biasing

Disclaimer: All specifications cited are based on historical datasheets. Electrical characteristics may vary between manufacturers (Hitachi vs. NEC). Always verify with the component in hand.

is a high-frequency Silicon N-Channel Dual-Gate MOSFET primarily used in VHF amplifier and mixer applications. Manufactured by companies like NEC, Hitachi, and Motorola

, it is a classic component often found in amateur radio equipment and older television tuners. www.jotrin.ru Key Technical Specifications

The 3SK41 is designed for low-noise, high-gain performance at high frequencies. Below are the typical parameters for this device: Drain-Source Voltage ( cap V sub cap D cap S end-sub Drain Current ( cap I sub cap D Power Dissipation ( cap P sub cap D 250mW (0.25W) Package Type: TO-72 (4-lead metal can) Drain-Source On-Resistance ( cap R sub cap D cap S open paren o n close paren end-sub Functional Overview

The dual-gate structure of the 3SK41 allows for several unique circuit advantages: Reduced Feedback Capacitance:

The second gate acts as a shield between the input gate and the drain, significantly reducing Miller effect capacitance. This provides better stability and higher gain at VHF frequencies. Automatic Gain Control (AGC):

By varying the bias on the second gate (Gate 2), the gain of the MOSFET can be controlled without significantly shifting the input impedance of Gate 1. Mixing Applications:

In mixer circuits, the local oscillator signal can be applied to Gate 2 while the RF signal is applied to Gate 1, allowing for efficient frequency conversion with low cross-modulation. Applications & Substitutes Common Uses:

Used in receiver RF amplifiers and balanced mixer stages, particularly in legacy radio gear. Equivalents: If the 3SK41 is unavailable, common substitutes include the 3SK40, 2SK701, 2SK702, and 2SK703 Legacy Availability:

It is currently considered an obsolete or "hard-to-find" part but can still be sourced through specialty electronic distributors like Jotrin Electronics

For a detailed visual of the pinout or specific performance curves, you can find the 3SK41 PDF datasheet on sites like AllDatasheet circuit diagrams

for a specific RF amplifier or mixer design using the 3SK41? 3SK41 Datasheet, PDF - ALLDATASHEET.COM

All. Datasheet. Distributor. Manufacturer. 3SK41. 3SK4. Match, Like. No Data. 3SK40(1) 3SK45(2) Start with. No Data. No Data. End. ALLDATASHEET.COM 3SK41 - NEC/HITACHI/MOTOROLA - Jotrin Electronics

Part 6: 3SK41 Equivalents and Substitutes

The 3SK41 has been obsolete for decades. You will likely need a replacement. Based on direct electrical comparison, here are the best 3SK41 equivalents:

Recommendation: For new designs, use the BF998R. For repairing a vintage 1980s TV tuner, search eBay or specialty surplus stores for NOS (New Old Stock) 3SK41B.

Powder Flow