2SC4957-A

Overview

The CEL 2SC4957-A is an NPN epitaxial silicon RF transistor designed for high-frequency low-noise amplification applications. Manufactured by California Eastern Labs, this component utilizes a 4-pin Super Minimold package to facilitate surface-mount integration in compact circuit designs. It operates as a discrete semiconductor device within the radio frequency spectrum, providing signal gain with minimal noise interference. The transistor is engineered for stability and performance in demanding RF environments, serving as a critical active element in amplifier stages where low noise figure and high frequency operation are required.

Feature Summary

• NPN epitaxial silicon construction optimized for RF signal processing
• Designed specifically for high-frequency low-noise amplification tasks
• Utilizes a 4-pin Super Minimold package for efficient surface-mount assembly

Applications

• High-frequency low-noise amplifier circuits
• RF signal processing stages
• Communication system front-ends

Part Context

The 2SC4957-A belongs to the broader family of RF transistors produced by California Eastern Labs (CEL) and later Renesas Technology Corp. It shares functional similarities with other devices in the 2SC4957 series, such as the 2SC4957-T1 and 2SC4957-T2, which feature identical electrical descriptions and pin configurations. These components are commonly referenced together in technical documentation for RF design purposes.

Replacement Considerations

Publicly confirmed substitute part numbers include the 2SC4957-T1 and 2SC4957-T2 from NEC and Renesas Technology Corp. These alternatives share the same functional description and package type, ensuring compatibility in existing RF amplifier designs without requiring schematic modifications.