3sk41 Datasheet

In the world of RF (Radio Frequency) design, certain components achieve legendary status not because of flashy marketing, but due to pure performance and reliability. The 3SK41 is one such component. While it is now considered an obsolete or "end-of-life" (EOL) part, this N-channel dual-gate MOSFET remains highly sought after by vintage radio restorers, HF amplifier builders, and electronics hobbyists.

If you are searching for the 3SK41 datasheet, you are likely either repairing a classic tuner from the 1980s–1990s, designing a low-noise front-end for a receiver, or trying to cross-reference a replacement. This article serves as a detailed datasheet analysis, covering absolute maximum ratings, electrical characteristics, pin configurations, application circuits, and modern alternatives.

(Adjust resistor and choke values to meet the datasheet’s recommended bias point where gm is adequate and ID within limits.)

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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 3sk41 datasheet

, 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): In the world of RF (Radio Frequency) design,

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 (Adjust resistor and choke values to meet the

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

While the original datasheet is out of print, consolidated technical data from component databases reveals the following absolute maximum ratings and electrical characteristics (at Ta = 25°C).