The 3SK41 was developed in the late 1970s and early 1980s by Japanese manufacturers like Hitachi, NEC, and Sanyo. It was famously used in the RF front-ends of high-end analog television tuners (Channels 1-12) and FM radio receivers.

The 3SK41 was specifically intended for use in , where its low noise figure and high input impedance were critical for achieving good sensitivity in FM tuners and other RF front‑ends. It was part of a family of Japanese dual‑gate MOSFETs, with the “3S” prefix indicating a four‑lead, single‑ended, high‑frequency device.

Gate 1, Gate 2, Source, Drain (often with a 4th lead for the case/shield) Commonly Available Data Sources: Alldatasheet - 3SK41L Veswin 3SK41 Description Utsource 3SK41 Description

) and allows for AGC (Automatic Gain Control) voltage implementation directly on the second gate. According to historical manufacturing parameters from suppliers like Jotrin Electronics and Veswin , the primary limits and electrical behaviors include:

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.

Additionally, the two gates can be used to inject signals into the transistor for purposes, which is why the 3SK41 was also found in converters and local oscillator stages of analog radios.

The 3SK41 is known for its linear transfer characteristics. This reduces the likelihood of "intermodulation distortion," ensuring that strong nearby signals do not drown out the weak signal you are trying to receive. 📐 Pinout and Package Information

The 3SK41 is a silicon N-channel dual-gate MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) produced primarily by Hitachi (now Renesas) and later by NEC. Unlike a standard JFET or single-gate MOSFET, the dual-gate architecture offers a unique advantage: it combines the low-noise characteristics of a JFET with the automatic gain control (AGC) capability of a bipolar transistor.

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

The 3SK41 is versatile within the RF spectrum. You will commonly find it used in:

: Optimized for rapid on/off transitions, it’s ideal for demanding switch-mode power supplies (SMPS) and high-frequency oscillators. Energy Efficient : It features a low

To help find exact substitute parts or layout diagrams, let me know: What (VHF or UHF) are you targeting? Are you repairing existing gear or building a new circuit ?

Since the 3SK41 is no longer in mass production, hobbyists and repair technicians often look for replacements. While no modern part is a 100% mechanical match, the following are often used in similar circuits: A very close relative often used interchangeably.