3sk41 Datasheet [repack] Jun 2026
The 3SK41 typically comes in a specialized 4-pin miniature plastic package (often designated as a variant of the TO-50 or a standard 4-pin RF lead frame). Because it is a high-frequency device, the pinout layout is designed to maximize isolation between the input and output.
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Found in legacy cellular base stations, marine radios, and amateur radio equipment.
3SK41 Datasheet and Information
The "dual-gate" design is the defining feature of the 3SK41, allowing it to excel in two specific areas:
Serves as the common reference point for both input and output loops. Core Applications and Circuit Deployments
The key electrical thresholds and operating limits defined in the official include the following core parameters: Drain-Source Breakdown Voltage ( 3sk41 datasheet
For those willing to perform a small mechanical adaptation, the BF998R is an N‑channel dual‑gate MOSFET in a SOT‑143 package. It is still in production and has superior noise figure and gain. It can be glued to a small adapter board or carefully soldered to wires to replace a TO‑72 device. Other possibilities include BF960 , BF961 , and BF981 .
: Used in communication receivers for amplification of intermediate frequencies. 5. Substitutes and Equivalents for 3SK41
The Kenwood TS-520S, a hugely popular HF transceiver, utilized the 3SK41 in multiple critical RF stages: The 3SK41 typically comes in a specialized 4-pin
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).
Understanding the full 3SK41 datasheet is crucial for choosing proper bias voltages, designing matching networks, or identifying suitable modern cross-references for repair projects. Key Technical Specifications
: Designed for efficient power management and high-speed signal processing. cap R sub cap D cap S open paren o n close paren end-sub This link or copies made by others cannot be deleted
The dual-gate structure of the 3SK41 makes it highly versatile in discrete RF receiver front-ends:
