STMicroelectronics

SD1446

SD1446 Description

The SD1446 from STMicroelectronics is an NPN RF transistor designed for high-power amplification in demanding RF applications. With a collector-emitter breakdown voltage (V_CE) of 18V and a maximum collector current (I_C) of 12A, it delivers robust performance in high-frequency circuits. Packaged in an M113 surface-mount case, it supports efficient thermal dissipation, handling up to 183W of power while maintaining stability at operating temperatures up to 200°C (T_J).

SD1446 Features

• High Power Handling: 183W max power dissipation for demanding RF amplification.
• High Current Capability: 12A collector current supports strong signal amplification.
• Optimized Gain: DC current gain (h_FE) of 10 @ 5A, 5V, ensuring efficient signal boosting.
• Surface-Mount Design: M113 package enables compact PCB integration.
• Robust Thermal Performance: Operates reliably at high junction temperatures (200°C).
• Compliance: ROHS3 and REACH compliant, meeting environmental standards.

SD1446 Applications

• RF Power Amplifiers: Ideal for HF/VHF/UHF transmitters in communication systems.
• Industrial RF Equipment: Used in plasma generators, RF heating, and medical diathermy.
• Military & Aerospace: Suitable for radar and avionics due to high power and thermal resilience.
• Broadcast Systems: Enhances FM/AM transmitters and repeaters with stable high-frequency performance.

Conclusion of SD1446

The SD1446 stands out as a high-performance NPN RF transistor, combining high power, thermal stability, and compact packaging. While now obsolete, its legacy in RF amplification remains relevant for engineers needing rugged, high-gain transistors in communication and industrial systems. Its M113 package and 183W power rating make it a preferred choice for applications requiring durability and efficiency in harsh environments.