BLS9G2934L-400U

Overview

The BLS9G2934L-400 is a single-ended LDMOS power transistor designed for S-band radar applications operating between 2.9 GHz and 3.4 GHz. It delivers 400 W output power at 1 dB gain compression with a typical drain efficiency of 43% and power gain of 11 dB under pulsed RF conditions (VDS = 32 V, IDq = 400 mA). The device features a 65 V drain-source breakdown voltage, 60 mΩ on-state resistance, and a maximum junction temperature of 225 °C. Packaged in the flanged ceramic SOT502A outline, it includes integrated dual-sided ESD protection and internal matching to facilitate circuit implementation.

Feature Summary

• Internally matched for ease of use
• Integrated dual-sided ESD protection enables excellent off-state isolation
• High flexibility with respect to pulse formats
• Excellent ruggedness capable of withstanding high load mismatch

Applications

• S-band radar systems

Procurement Notes

Verify the specific package variant required for the design. The standard BLS9G2934L-400 utilizes the SOT502A flanged ceramic package with mounting holes. Confirm that the ordering suffix matches the intended mechanical footprint and lead configuration before finalizing procurement specifications.

Selection Notes

Select this component for high-power S-band radar transmitters requiring robust performance. Ensure the thermal management system supports the specified transient thermal impedance values. Verify that the application operates within the Class-AB pulsed parameters defined in the datasheet to maintain reliability and meet the 10:1 VSWR ruggedness requirements.

Part Context

This part belongs to the Ampleon LS-400 family of LDMOS power transistors. It shares core electrical characteristics with the BLS9G2934LS-400, which differs only in its earless flanged SOT502B package. Both devices are engineered for high-efficiency amplification in demanding radar environments.

Replacement Considerations

The BLS9G2934LS-400 is a direct functional substitute with identical electrical specifications. It utilizes the SOT502B earless flanged package instead of the SOT502A. Mechanical integration requires verification of mounting hole compatibility.