3sk41 Datasheet Jun 2026

The 3SK41 is pin-compatible with standard JFETs like the MPF102. The most common package is the 4-pin TO-72 metal can. Viewing from the bottom (leads facing you, tab pointing up):

Typically acts as the primary signal injector. Because the input capacitance ( Cisscap C sub i s s end-sub

A highly popular, widely available Silicon dual-gate MOSFET from NXP/Infineon. While it has different biasing characteristics because it is silicon-based rather than Gallium Arsenide, it serves a very similar functional purpose in VHF/UHF amplifier and mixer stages. 3sk41 datasheet

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Go to product viewer dialog for this item. 1 Pcs - 3sk41 "original" Nec Mosfet N-chanel Tested

Hobbyists often replace the 3SK41 in vintage rigs to achieve better sensitivity (up to 6dB improvement) and lower background noise. The 3SK41 is pin-compatible with standard JFETs like

A highly common surface-mount (SOT-143) alternative offering excellent transconductance and low noise for RF applications.

Applying the local oscillator (LO) to Gate 2 and the RF input signal to Gate 1 achieves low-distortion signal mixing. Because the input capacitance ( Cisscap C sub

Typically utilized for AGC (Automatic Gain Control) voltage or local oscillator input in mixer circuits.

Note: When replacing a through-hole TO-72 component like the 3SK41 with a modern surface-mount alternative like the BF998, a small breakout adapter board may be required to match the legacy PCB footprint.

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