3sk41 Datasheet

The Sansui G‑7500 , a high‑power receiver from the late 1970s, uses a 3SK41 in its front‑end RF amplifier stage. Other classic tuners from brands such as Kenwood, Pioneer, and Marantz also employed the 3SK41 or its close relatives (3SK40, 3SK45) in their FM sections. The Sansui 8080 and 9090 models are particularly well‑known for having tuners that rely on these fragile FETs, and their failure is a common point of failure in these otherwise robust receivers.

When working with a device like the 3SK41, keep these crucial points in mind:

3SK41 (Silicon N-Channel Power MOSFET) Key Datasheet Parameters: 3sk41 datasheet

Because it is a dual-gate device, the pinout contains two separate gate terminals:

Standard range (e.g., up to 125°C or higher for metal cans) Feature Look-In: The Dual-Gate Advantage The defining characteristic of the 3SK41 is its The Sansui G‑7500 , a high‑power receiver from

The provides critical technical specifications for an legacy N-channel dual-gate Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) . Originally manufactured by Japanese and global semiconductor pioneers including NEC, Hitachi, and Motorola , the 3SK41 was built in a TO-72 (CAN-4) metal package . It was engineering-optimized for high-frequency RF amplification, fast switching, and low noise figures in consumer and industrial communication tuners.

The dual-gate architecture of the 3SK41 provides a significant edge over standard single-gate MOSFETs in RF environments: When working with a device like the 3SK41,

), engineers can easily adjust the amplifier's gain without affecting the input characteristics at the first gate ( G1cap G sub 1

The 3SK41's unique design makes it ideal for several RF-specific scenarios:

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