MRF300BN

Overview

The MRF300BN is a high ruggedness N-channel enhancement-mode lateral MOSFET (LDMOS) transistor designed for wideband RF power applications. It operates within the 1.8 to 250 MHz frequency range and supports up to 300 W continuous wave output at 50 Vdc. The device features a TO-247-3 package with Pin 1 as Drain, Pin 2 as Source, and Pin 3 as Gate. It includes integrated ESD protection and is characterized for operation from 30 V to 50 V.

Feature Summary

• Mirror pinout version B simplifies push-pull configurations by providing opposite pin connections compared to version A.
• Integrated electrostatic discharge protection allows for a greater negative gate-source voltage range suitable for Class C operation.
• High ruggedness ensures no device degradation under severe load mismatch conditions exceeding 65:1 VSWR.

Applications

• Industrial, scientific, and medical equipment such as plasma etching and laser generation
• HF and VHF communications systems
• Radio and VHF TV broadcasting transmitters

Procurement Notes

Verify the specific suffix against official documentation to confirm pinout orientation, as the 'B' designation indicates a mirror pinout relative to the 'A' variant. Confirm RoHS compliance status through the manufacturer's current material declaration or certificate of analysis, as environmental data may vary by production batch.

Selection Notes

Select this component when a mirrored pinout is required for balanced push-pull amplifier designs. Ensure the application utilizes a 50 Vdc supply and operates within the specified thermal limits. Verify that the input matching network accommodates the specific source impedance provided in the reference circuits for the target operating frequency.

Part Context

This device belongs to the MRF300AN/MRF300BN series of RF Power LDMOS Transistors from NXP Semiconductors. Both variants share identical electrical performance characteristics but differ in pinout configuration to facilitate different circuit layouts. The series is supported by a product longevity program ensuring supply availability for a minimum of 15 years after launch.

Replacement Considerations

The MRF300AN serves as the direct functional counterpart with an inverted pinout. Designers must verify pin assignments before substitution to prevent circuit damage due to incorrect drain, source, or gate connections.

FAQ

What is the pinout configuration for the MRF300BN?

Pin 1 is the Drain, Pin 2 is the Source, and Pin 3 is the Gate.

How does the MRF300BN handle load mismatches?

The device exhibits high ruggedness and shows no degradation when subjected to VSWR conditions exceeding 65:1 at all phase angles during pulse testing.

Is the MRF300BN suitable for linear applications?

Yes, the datasheet explicitly lists suitability for linear applications alongside Class C operation capabilities.