3sk41 Datasheet !exclusive! (Mobile OFFICIAL)

Introduction In the world of high-frequency analog design, few components have achieved the legendary status of the dual-gate MOSFET. Among these, the 3SK41 stands out as a classic, highly regarded Japanese transistor from the golden age of VHF and UHF tuners. If you are searching for the 3sk41 datasheet , you are likely working on a vintage radio restoration, an RF preamplifier project, or studying the history of MOSFET technology.

| Variant | IDSS (Zero gate voltage) | Typical Application | | :--- | :--- | :--- | | | 2.5 – 15 mA (Wide spread) | General purpose, factory selected for tuners. | | 3SK41A | 2.5 – 7.0 mA (Lower) | Best for battery-operated devices or lower noise applications. | | 3SK41B | 7.0 – 15 mA (Higher) | Best for high-gain stages (e.g., VHF TV tuner mixers). | 3sk41 datasheet

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. Introduction In the world of high-frequency analog design,

| Part Number | Compatibility Notes | Availability | | :--- | :--- | :--- | | | Nearly identical pinout (SOT-103). Superior noise figure (2dB). Drop-in with adapter. | Scarce | | BF998 | Surface mount (SOT-143). Higher transconductance. Requires a breakout board. | Common | | 3SK74 | Direct Japanese equivalent. Same TO-72 package. Perfect for vintage restorations. | Rare | | MPF121 | American equivalent, but higher capacitance. Not ideal above 150 MHz. | Obsolete | | Dual-gate 40673 | Metal can. Higher VDS tolerance but lower gain. Works as a slow substitute. | Obsolete | | Variant | IDSS (Zero gate voltage) |