MX0912B351Y,114

Overview

The MX0912B351Y is an NPN silicon planar epitaxial microwave power transistor designed for broadband pulse power amplification. It operates in a common base configuration within the 960 MHz to 1215 MHz frequency range. The device utilizes a SOT439A metal ceramic flange package with the base connected directly to the flange. Key electrical specifications include a collector-base voltage of 65 V, a collector-emitter voltage of 60 V, and a peak total power dissipation of 960 W under pulsed conditions (tp = 10 μs; δ = 10%). In typical operation at 50 V supply voltage, it delivers output power exceeding 325 W with a gain greater than 7 dB and efficiency above 40%.

Feature Summary

• Interdigitated structure with diffused emitter ballasting resistors ensures excellent current sharing and withstands high VSWR.
• Gold metallization provides stable characteristics and extended operational lifetime.
• Multicell geometry balances dissipated power with low thermal resistance.
• Integrated input and output matching cells facilitate easier circuit design.

Applications

• Common base class C broadband pulse power amplifiers
• TACAN (Tactical Air Navigation) systems

Procurement Notes

Verify component authenticity by checking datasheet revision dates against Philips Semiconductors records. Confirm the presence of beryllium oxide warnings on packaging due to safety regulations. Ensure handling procedures comply with chemical waste disposal standards for BeO-containing components. Validate pin configurations match the SOT439A outline before installation.

Selection Notes

Select this component for applications requiring high linearity and stability in L-band pulse amplification. Consider the specific thermal management requirements associated with the SOT439A package and its mounting base temperature limitations. Evaluate impedance matching networks based on the provided Smith chart data for optimal load and source impedances across the operating bandwidth.

Part Context

This part belongs to the family of NPN microwave power transistors originally manufactured by Philips Semiconductors. It shares structural similarities with other devices utilizing interdigitated geometries for high-frequency power handling. The MX0912B351Y represents a specific iteration optimized for TACAN applications, distinct from general-purpose RF transistors by its specialized ballasting and matching features.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires detailed comparison of pinouts, thermal resistance values, and impedance characteristics with potential alternatives.