NXP Semiconductors MRF300A-40MHZ

Overview

MRF300A-40MHZ from NXP Semiconductors is a 300 W CW RF power LDMOS transistor optimized for 40.68 MHz industrial, scientific, and medical (ISM) applications including plasma etching and MRI systems. It operates at 50 Vdc drain supply, delivers 330 W peak output in pulsed mode, achieves 28.2 dB power gain and 79.0% drain efficiency at 40.68 MHz CW, and features TO-247-3L package with mirror-pinout compatibility for push-pull amplifier designs.

For engineers reviewing the MRF300A-40MHZ datasheet, MRF300A-40MHZ pinout, MRF300A-40MHZ application, or MRF300A-40MHZ equivalent, this page provides verified performance data at its designated 40.68 MHz reference frequency, ruggedness validation under 65:1 VSWR load mismatch, thermal impedance specs, and design-ready matching network impedance values (Z_source = 7.83 + j13.51 Ω, Z_load = 5.34 + j1.03 Ω).

Technical Context

This device is a high-ruggedness, enhancement-mode lateral MOSFET designed for broadband HF/VHF RF power amplification up to 250 MHz. Its LDMOS structure enables stable operation under severe load mismatches and supports linear and Class C modes via extended negative gate-source voltage range (–6.0 V).

Characterized specifically in the NXP 40.68 MHz reference circuit (page 15), it uses fixed bias (I_DQ = 100 mA), requires 50 Vdc supply, and achieves optimal performance with input power of 0.5 W CW - delivering 330 W output, 28.2 dB gain, and 79.0% efficiency while maintaining <–21 dB input return loss.

Key Specifications

Pinout & Package

Package: TO-247-3L (lead-free, RoHS-compliant). Exposed backside serves as source terminal. Pin 1: Gate, Pin 2: Source, Pin 3: Drain.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RF power amplifier applications.

Compared with MRF300BN-40MHZ and MRFE6VP6300H, the MRF300A-40MHZ offers the most cost-effective, thermally efficient, and layout-optimized solution specifically validated at 40.68 MHz - with lower gate drive sensitivity, smaller footprint, and guaranteed longevity for ISM equipment lifecycles.

Availability

MRF300A-40MHZ is available at Aetrix Electronics and suitable for plasma etching systems, MRI RF amplifiers, and industrial heating generators requiring stable component supply, long-term manufacturing continuity, and validated 40.68 MHz performance.

Supply support for MRF300A-40MHZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global leader in high-performance RF power solutions, specializing in robust LDMOS and GaN technologies for industrial, medical, and broadcast markets.

The MRF300A-40MHZ belongs to NXP's wideband RF power LDMOS family, engineered for extreme ruggedness and efficiency in demanding ISM applications - particularly where load mismatch tolerance and long-term reliability are non-negotiable.

FAQ

What is the exact package type and pin configuration of MRF300A-40MHZ?

The MRF300A-40MHZ uses a TO-247-3L package with defined pinout: Pin 1 is Gate, Pin 2 is Source (internally tied to exposed backside metal), and Pin 3 is Drain. This matches the MRF300AN variant referenced in NXP's official documentation (Table 7, Rev. 2, 06/2019), and is distinct from the mirror-pinout MRF300BN.

Does MRF300A-40MHZ require external ESD protection in circuit design?

No - the MRF300A-40MHZ integrates on-die ESD protection rated to HBM Class 2 (2500 V) and CDM Class C3 (1200 V) per JS-001 and JS-002 standards. External TVS diodes are unnecessary for handling typical board-level ESD events, though proper grounding and layout remain essential.

What are the validated source and load impedances for MRF300A-40MHZ at 40.68 MHz?

Per NXP's 40.68 MHz reference circuit (Figure 17), the series-equivalent impedances are Z_source = 7.83 + j13.51 Ω (measured from gate to ground) and Z_load = 5.34 + j1.03 Ω (measured from drain to ground). These values are critical for designing matching networks that achieve the published 330 W output and 28.2 dB gain.

Can MRF300A-40MHZ operate reliably under severe load mismatch conditions?

Yes - the MRF300A-40MHZ has been tested and confirmed to withstand >65:1 VSWR at 40.68 MHz using a 100 µs pulse with 20% duty cycle and 3 dB overdrive (Table 6). No device degradation was observed, making it suitable for highly reactive loads like plasma chambers and MRI coils without external circulators or isolators.

Is MRF300A-40MHZ part of NXP's long-term supply program?

Yes - the MRF300A-40MHZ is included in NXP's Product Longevity Program, guaranteeing minimum availability for 15 years after product launch. This assurance applies directly to the MRF300A-40MHZ configuration and supports extended deployment in medical, industrial, and broadcast infrastructure where component obsolescence poses critical risk.