3sk41 Datasheet Link

Used as a low-noise mixer in heterodyne receivers.

Serves as the common reference point for both input and output loops. Core Applications and Circuit Deployments

Since an original datasheet is hard to find, use this quick in-circuit or out-of-circuit test procedure. 3sk41 datasheet

While specific values can vary slightly by manufacturer (historically produced by companies like Hitachi or NEC), the standard parameters for the 3SK41 include: N-Channel Depletion Mode Dual-Gate MOSFET. Drain-Source Voltage ( VDScap V sub cap D cap S end-sub ): Max 20V. Drain Current ( IDcap I sub cap D ): Max 25mA. Power Dissipation ( Ptotcap P sub t o t end-sub ): Approximately 200mW to 300mW. Forward Transfer Admittance ( ): Typically 10 to 15 mS (millisiemens) at 1kHz. Input Capacitance ( Cisscap C sub i s s end-sub ): Low, typically around 5.0pF to 6.0pF.

Utilizing the two gates to mix the RF signal with a Local Oscillator (LO) signal efficiently. Used as a low-noise mixer in heterodyne receivers

Front-end amplification in FM, VHF, and UHF receivers.

I can provide target resistor values or schematic modification advice for your repair. AI responses may include mistakes. Learn more Share public link While specific values can vary slightly by manufacturer

A common trick is to take a modern, low‑cost MOSFET and mark it with “3SK41.” A genuine 3SK41 should have a TO‑72 metal can , not a plastic body. It will also have four leads, not three. If a “3SK41” looks like a plastic TO‑92 transistor, it is almost certainly a counterfeit.

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