BLS3135-65I

Overview

The BLS3135-65I is a microwave power transistor manufactured by Ampleon USA Inc. It is an NPN bipolar RF transistor housed in a SOT422A chassis mount package. Key electrical specifications include a collector-emitter breakdown voltage of 75V, a transition frequency of 3.5GHz, and a maximum power output of 200W. The device offers a typical gain of 7dB and supports a DC current of 8A.

Feature Summary

• High-power microwave operation capability
• Chassis mount construction for thermal management
• NPN bipolar junction transistor architecture

Applications

• Microwave communication systems
• RF power amplification stages
• Industrial heating and plasma generation

Procurement Notes

Verify the exact part number suffix against official Ampleon documentation to ensure correct pinout and electrical characteristics. Confirm that the SOT422A package matches your thermal design requirements. Request manufacturer datasheets to validate performance curves under specific bias conditions before integration into final products.

Selection Notes

Select this component when high-output power at microwave frequencies is required. Ensure the system can handle the 75V breakdown rating and provide adequate cooling for the 200W dissipation. Compare gain and frequency specs against alternative transistors if different impedance matching or bandwidth is needed for the specific application circuit.

Part Context

This device belongs to the Ampleon portfolio of bipolar RF transistors designed for robust microwave applications. The SOT422A package facilitates direct mounting to heat sinks, distinguishing it from surface-mount alternatives. It serves as a critical active element in high-efficiency power amplifier modules operating in the UHF and microwave bands.

Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement maintains the NPN configuration, similar voltage ratings, and compatible package dimensions for mechanical fit. Verify that thermal resistance and gain characteristics meet or exceed original design margins.