BLL8H1214L-500U

Overview

The BLL8H1214L-500 is a 500 W LDMOS power transistor designed for L-band radar applications in the 1.2 GHz to 1.4 GHz range. It operates with a drain-source voltage of 50 V and delivers 500 W output power at 17 dB gain and 50% drain efficiency. The device features an internally matched balanced ceramic package (SOT539A) with two mounting holes and four leads. Key electrical parameters include a drain-source breakdown voltage of 100 V, gate-source threshold voltage of 1.8 V typ, and a junction temperature limit of 225 °C.

Feature Summary

• Internally matched for ease of use
• Integrated dual side ESD protection
• High flexibility with respect to pulse formats
• Excellent ruggedness

Applications

• L-band power amplifiers for radar applications in the 1.2 GHz to 1.4 GHz frequency range

Procurement Notes

Verify the specific package variant required for the design. The standard BLL8H1214L-500 utilizes the SOT539A flanged balanced ceramic package with two mounting holes. Ensure that the procurement order explicitly specifies this package type to distinguish it from the earless SOT539B variant. Confirm RoHS compliance status as per the latest manufacturer documentation before finalizing orders.

Selection Notes

Select the BLL8H1214L-500 for high-power L-band radar systems requiring robust performance between 1.2 GHz and 1.4 GHz. The device supports class-AB operation with pulsed RF signals. Designers must account for the 50 V drain-source voltage requirement and ensure thermal management capabilities support the specified junction temperature limits under maximum power conditions.

Part Context

This component belongs to the Ampleon LDMOS power transistor family specifically engineered for radar infrastructure. It serves as a critical active element in high-efficiency power amplifier stages. The product line emphasizes broadband operation and thermal stability, addressing the demanding requirements of modern military and civilian radar systems operating in the L-band spectrum.

Replacement Considerations

The BLL8H1214LS-500 is a direct functional alternative featuring the SOT539B earless flanged balanced ceramic package. Both devices share identical electrical specifications and pinouts. Selection depends solely on mechanical mounting constraints regarding the presence or absence of mounting holes.