3sk41 Datasheet New! Guide
As the 3SK41 is an older, often obsolete component, engineers and technicians may need replacements.
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
): Max 5.0 pF. Minimal capacitive loading preserves high-frequency bandwidth. Max 4.0 V. Conduction Efficiency: Designed with a minimized
The 3SK41, typically manufactured by companies like Toshiba or Mitsubishi, belongs to a specific class of transistor known as the dual-gate MOSFET. To understand the significance of the 3SK41 datasheet, one must understand the problem it solved. In the 1970s and 1980s, the television set was undergoing a radical transformation. The bulky, fragile vacuum tubes that had defined the "TV set" for decades were being replaced by silicon. However, radio frequency (RF) signals—specifically the VHF and UHF bands used for broadcast TV—were notoriously difficult to handle with early transistors. 3sk41 datasheet
& Case Shielding (often grounded to reduce stray RF noise) Pin 2: Drain (D) Pin 3: Gate 2 ( G2cap G sub 2 ) Pin 4: Gate 1 ( G1cap G sub 1 ) Working Principle: Why Dual-Gate?
A complete datasheet PDF is not widely available for this vintage component. The information above represents the most reliable compilation of the device’s parameters from various component databases and service manuals.
): The negative voltage required on Gate 2 to pinch off the channel. Typically ranges between -0.5V and -2.5V. AC / Dynamic Characteristics Also known as transconductance ( As the 3SK41 is an older, often obsolete
By feeding the local oscillator signal into Gate 2 and the incoming RF signal into Gate 1, the 3SK41 functions as an incredibly stable, low-distortion mixer.
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? In the 1970s and 1980s, the television set
Minimizes loading on preceding stages. 2. Technical Specifications (Absolute Maximum Ratings)
Typically utilized for AGC (Automatic Gain Control) voltage or local oscillator input in mixer circuits.
: Offers factory information and application notes for brands like NEC, Hitachi, and Motorola. 3SK41 - NEC/HITACHI/MOTOROLA - Jotrin