MRF171A

Overview

The MRF171A is an N-channel enhancement mode RF MOSFET designed for wideband large-signal output and driver stages from 30–200 MHz. It guarantees 45 W output power, 17 dB minimum gain, and 60% minimum efficiency at 150 MHz with a 28 Vdc supply. The device features excellent thermal stability suitable for Class A operation and low Crss of 8 pF at VDS = 28 V. It includes gold top metal and is tested for load mismatch at all phase angles with 30:1 VSWR.

Feature Summary

• Designed primarily for wideband large-signal output and driver stages from 30–200 MHz
• Excellent thermal stability, ideally suited for Class A operation
• Facilitates manual gain control, ALC and modulation techniques
• 100% tested for load mismatch at all phase angles with 30:1 VSWR

Applications

• Industrial radio equipment
• Commercial radio equipment
• Amateur radio equipment

Procurement Notes

Verify the specific datasheet revision (e.g., Rev. V1) against the manufacturer's official documentation to ensure alignment with current design parameters. Confirm that the Case 211-07 Style 2 package dimensions match the target PCB layout requirements. Ensure the application environment supports the specified operating temperature range and voltage conditions for optimal performance.

Selection Notes

Select this component for applications requiring high linearity and stable performance in Class A amplifier configurations within the 30–200 MHz band. Consider its suitability for designs needing robust load mismatch tolerance up to 30:1 VSWR. Evaluate the thermal management requirements based on the 115 W power dissipation capability and the need for efficient heat sinking to maintain reliability.

Part Context

The MRF171A belongs to MACOM's RF MOSFET Line, specifically engineered for broadband power amplification. It serves as a key component in transmitter chains where consistent gain and output power are critical across a wide frequency spectrum. Its construction supports reliable operation in demanding RF environments typical of communication systems.

Replacement Considerations

Consult the official MACOM product portfolio for direct replacements or pin-compatible alternatives within the same series. Verify electrical specifications and mechanical footprint compatibility before substitution.

FAQ

Is the MRF171A suitable for Class A operation?

Yes, the datasheet states it has excellent thermal stability and is ideally suited for Class A operation.

What is the maximum VSWR the device can tolerate?

The device is 100% tested for load mismatch at all phase angles with 30:1 VSWR.

What is the typical power gain at 30 MHz?

The typical power gain at 30 MHz, 28 Vdc is 20 dB.