MDS70

Overview

The MDS70 is a bipolar RF transistor designed for avionics applications, operating within the 1.03 GHz to 1.09 GHz frequency range. It delivers 225 watts of power in a chassis mount configuration. The device features an NPN structure with a maximum collector-emitter voltage of 65 volts and a continuous collector current of 5 amperes. It supports a junction temperature range up to 200°C and utilizes the 55CX package style.

Feature Summary

• High-power output capability suitable for demanding avionics environments
• Optimized performance across the 1030-1090 MHz aviation band
• Robust thermal management supporting high junction temperatures

Applications

• Avionics communication systems
• Pulsed RF amplification
• Military aircraft transmitters

Procurement Notes

Verify the manufacturer origin carefully, as Microsemi was acquired by Microchip Technology. Confirm that the specific part number corresponds to the original Microsemi specifications rather than generic equivalents. Ensure the chassis mount package type matches your mechanical design requirements before finalizing procurement orders.

Selection Notes

Select this component when high power density is required for avionics frequencies between 1.03 and 1.09 GHz. The 55CX package facilitates efficient heat dissipation for chassis mounting. Consider the 65V rating and 5A current limit to ensure compatibility with your circuit's electrical boundaries and thermal constraints.

Part Context

This component belongs to the category of bipolar RF transistors originally developed by Microsemi Corporation. It serves specialized roles in aerospace and defense sectors where reliable high-frequency operation is critical. The product line focuses on ruggedized semiconductor solutions for harsh operational environments.

Replacement Considerations

Check for direct cross-reference data from Microchip Technology following the acquisition. Verify pinout compatibility and thermal resistance values if substituting with other chassis-mounted RF transistors. Ensure any alternative meets the same avionics frequency and power output standards.