3sk41 Datasheet -

): Min 8.0 mS. High gain structure allows weak signal reception. Input Capacitance ( Cisscap C sub i s s end-sub

It is highly effective in frequency mixer circuits, where local oscillator and RF signals are applied to separate gates to produce an intermediate frequency (IF). Low Feedback Capacitance:

), eliminating the "Miller Effect" that routinely destabilizes single-gate transistors at high frequencies. 3sk41 datasheet

For new designs, use the BF998R . For repairing a vintage 1980s TV tuner, search eBay or specialty surplus stores for NOS (New Old Stock) 3SK41B .

While implementing this feature, the designer must adhere to the graph in the 3SK41 datasheet. During the soft-start ramp, the transistor passes through the linear region where both Voltage ($V_DS$) and Current ($I_D$) are high. The soft-start duration must be calculated carefully so that the transient thermal limit of the 3SK41 is not exceeded during this transition. ): Min 8

Although the 3SK41 is no longer in production, its legacy as a high-performance dual-gate MOSFET continues. This guide compiles the scattered but essential information from its unofficial datasheet, detailing its critical role and electrical specifications. As you work on vintage gear, use this resource to identify the device, understand its function, and find suitable modern equivalents for reliable repairs.

The dual-gate structure of the 3SK41 provides significant advantages in RF signal processing. Why Dual-Gate? Low Feedback Capacitance: ), eliminating the "Miller Effect"

Designed to minimize the "hiss" or thermal noise added to weak signals, making it ideal for the front-end stages of receivers.

Used as a low-noise mixer in heterodyne receivers.