3sk41 Datasheet Review

In single-gate models, the capacitance between the gate and drain is high (around 5pF), which can cause instability at high frequencies. The dual-gate structure reduces this "Miller Effect," allowing for much higher gain at 100MHz and above.

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.

If you are searching for the , you are likely either repairing a classic tuner from the 1980s–1990s, designing a low-noise front-end for a receiver, or trying to cross-reference a replacement. This article serves as a detailed datasheet analysis, covering absolute maximum ratings, electrical characteristics, pin configurations, application circuits, and modern alternatives. 3sk41 datasheet

Ciss(max)cap C sub i s s open paren m a x close paren end-sub Maximum capacitance seen looking into the gate Anatomy of a Dual-Gate MOSFET

As the 3SK41 is increasingly classified as an "obsolete" or hard-to-find part, finding a modern equivalent is often necessary for repairs or new designs. Common substitutes include: In single-gate models, the capacitance between the gate

The 3SK41 represents a pivotal chapter in the history of consumer electronics: The Golden Age of RF:

Minimizes feedback, reducing the risk of unwanted oscillations without complex neutralizing circuits. 2. Pinout and Physical Package The is one such component

In conclusion, the 3SK41 is a versatile N-channel JFET with a range of applications in electronic circuits. Its high gain, low noise figure, and good stability make it a popular choice among circuit designers and engineers.

In the , the leads are arranged in a circle around the metal can. A small tab or a flattened area on the can indicates the Source lead. The Drain is typically the single lead that protrudes on the opposite side of the package. The two gate leads are located on the sides. It is strongly recommended to consult the original service manual for the specific equipment or a reliable datasheet when identifying the leads on an actual device.

When selecting a replacement, pay close attention to the and the bias requirements (depletion‑mode versus enhancement‑mode), as not all MOSFETs are directly interchangeable.

Operating the 3SK41 beyond these limits can cause permanent damage to the GaAs structure. Engineers must design biasing networks that keep the transistor well within these boundary thresholds at an ambient temperature ( Drain-Source Voltage VDScap V sub cap D cap S end-sub Gate 1-Source Voltage VG1Scap V sub cap G 1 cap S end-sub Gate 2-Source Voltage VG2Scap V sub cap G 2 cap S end-sub Drain Current IDcap I sub cap D Total Power Dissipation PDcap P sub cap D 200 to 250 Channel Temperature Tchcap T sub c h end-sub ∘Craised to the composed with power C Storage Temperature Range Tstgcap T sub s t g end-sub -55 to +125 ∘Craised to the composed with power C 4. Electrical Characteristics