PH3135-20M

Overview

The PH3135-20M is a radar pulsed power transistor manufactured by MACOM Technology Solutions. It operates within the 3.1 to 3.5 GHz frequency range and delivers 20W of output power under 100µs pulse conditions with a 10% duty cycle. The device utilizes an NPN silicon microwave structure in a common base configuration, featuring internal input and output impedance matching. Key electrical specifications include a collector-emitter breakdown voltage of 65V, a thermal resistance of 1.1°C/W, and a minimum collector efficiency of 35%. It is housed in a hermetic metal/ceramic package compliant with RoHS standards.

Feature Summary

• NPN silicon microwave power transistor with high-efficiency inter-digitized geometry
• Broadband Class C operation optimized for radar pulsed power applications
• Internal input and output impedance matching for simplified circuit integration
• Hermetic metal/ceramic package construction with gold metallization system

Applications

• Radar pulsed power amplification systems
• Microwave communication transmitters
• Electronic warfare signal generation

Procurement Notes

Verify the specific revision status (Rev. V1) against current production batches when sourcing components. Confirm that the hermetic metal/ceramic package matches the required environmental sealing specifications for the target application. Ensure compatibility with the specified 36V supply voltage and thermal management requirements during procurement validation.

Selection Notes

Select this component for applications requiring 20W output power between 3.1 and 3.5 GHz with 100µs pulse widths. Consider the 1.1°C/W thermal resistance for heat sink design and the 65V breakdown voltage for biasing headroom. Compare gain and efficiency curves at 3.1, 3.3, and 3.5 GHz against system requirements to ensure adequate performance margins across the entire operating band.

Part Context

This part belongs to the PH3135 series of radar pulsed power transistors from MACOM. It shares architectural similarities with other devices in the family but is distinctively rated for 20W output power at 100µs pulses. It complements higher power variants like the PH3135-55L and lower power options within the same frequency band, providing a specific solution for mid-power radar transmitter modules.

Replacement Considerations

Direct substitutes are not explicitly listed in the provided documentation. Evaluate similar MACOM parts such as the PH3134-20M or PH3135-55L based on power handling and pulse width requirements. Verify pinout compatibility and thermal characteristics before considering any cross-model replacements.