Datasheet Better: 3sk41

For modern designs, consider upgrading to a BF998 or MMBF4416. For restoration, treat a NOS 3SK41 as a precious artifact—and handle it with electrostatic reverence.

The 3SK41 is housed in a standard , offering robust RF shielding and thermal dissipation. The typical pin orientation, when looking at the bottom of the transistor lead layout with the alignment tab pointing downwards, is configured as follows: Pin 1: Source (S) & Case grounding. Pin 2: Drain (D) . Pin 3: Gate 2 ( G2cap G sub 2

Used as a low-noise mixer in heterodyne receivers.

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

Understanding the full electrical profile of this component requires a deep dive into the official specifications, pin configuration, and potential circuit replacements. Core Technical Specifications 3sk41 datasheet

: The dual-gate structure allows one gate to receive the RF signal and the other to receive the Local Oscillator (LO) signal, resulting in efficient mixing.

Whether you are repairing a classic ICOM receiver, building a low-noise preamplifier for an SDR, or simply satisfying your curiosity about dual-gate MOSFETs, understanding the 3SK41’s pinout (TO-72), biasing (VG2 = 4V typical), and limitations (200mW, 30mA) is essential.

(Connected internally, usually connected to ground)

: Allows for superior gain control and low cross-modulation, making it ideal for radio frequency (RF) stages. Fast Switching For modern designs, consider upgrading to a BF998

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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 ?

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 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.

: The input impedance of the 3SK41 is extremely high (in the megohm range). This makes it susceptible to damage from electrostatic discharge (ESD). Always use grounded soldering irons and anti-static wrist straps when handling. The typical pin orientation, when looking at the

While newer technology has emerged, the 3SK41 remains relevant for the repair of legacy equipment, amateur radio projects, and specific RF applications requiring low noise and high gain. 1. 3SK41 Overview and Main Characteristics

: 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

): The negative voltage required to turn off the channel current. Forward Transfer Admittance (