3sk41 Datasheet _top_ Jun 2026

The electrical characteristics define how the transistor performs under standard operating conditions ( DC Characteristics Gate-Source Cutoff Voltage (

Furthermore, the datasheet highlights a growing crisis in the "Right to Repair" movement. For vintage audiovisual enthusiasts and archivists, the 3SK41 is a critical component. When a vintage Sony Trinitron from the 1980s fails to pick up a signal, it is often this small, metal-can transistor that has failed. The datasheet provides the necessary "pinout" and replacement specifications, allowing a modern engineer to hunt for a modern equivalent (like the BF998) to keep the antique running. Without the datasheet, the device is a black box; with it, the device can be understood, reverse-engineered, and potentially revived.

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 3sk41 datasheet

Because the original 3SK41 is an obsolete part that can be difficult to source or expensive to purchase through legacy distributors like Littlediode , cross-referencing alternative part numbers is a common necessity. Depending on the circuit layout and performance parameters, the following parts serve as suitable substitutes: Component Part Number Package Type Key Structural Differences / Notes TO-72 / CAN-4

The dual-gate construction reduces the internal capacitance between the drain and the input gate, which improves stability and prevents unwanted oscillations at high frequencies. Typical Pinout (TO-72 Style) Key Technical Specifications Because the original 3SK41 is

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

When looking at the bottom of a TO-72 metal package (with the tab as a reference): (often connected to the case) Drain Gate 2 Gate 1 Modern Availability the device is a black box

Provides significant signal boost in the VHF range.

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