NXP Semiconductors MRFX600H-88MHZ

Overview

MRFX600H-88MHZ from NXP Semiconductors is a high-ruggedness, 600 W CW, 65 V LDMOS RF power transistor designed for broadband industrial and broadcast amplifiers operating at 87.5–108 MHz. It delivers 680 W output power, 21.3 dB power gain, and 83.0% drain efficiency at 98 MHz under 62 V DC supply in a matched reference circuit. Its dual-gate/dual-drain structure supports push-pull or single-ended configurations in HF/VHF transmitters.

For engineers reviewing the MRFX600H-88MHZ datasheet, MRFX600H-88MHZ pinout, MRFX600H-88MHZ application, or MRFX600H-88MHZ equivalent, key selection criteria include its 179 VDS breakdown voltage, 0.15 °C/W thermal resistance (CW), 65:1 load mismatch ruggedness at 230 MHz, ESD Class 2 HBM rating, and NI-780H-4L air-cavity package compatibility with high-power RF PCB thermal management.

Technical Context

The MRFX600H-88MHZ is a laterally diffused MOSFET optimized for continuous-wave operation across 1.8–400 MHz, with verified performance in the 87.5–108 MHz FM broadcast band. Its unmatched input/output impedance enables wideband matching without external tuning networks, and its dual-source (backside) construction simplifies heatsink integration.

It operates in enhancement-mode with gate threshold voltage of 2.1–2.9 V and supports quiescent current adjustment from 100 mA to 750 mA per side. The device is characterized for both CW (62 V, 250 mA IDQ) and pulsed (65 V, 100 μs/20% duty) conditions, with validated ruggedness under >65:1 VSWR at 230 MHz using 3 dB overdrive.

Key Specifications

Pinout & Package

The MRFX600H-88MHZ is housed in an NI-780H-4L air-cavity ceramic/metal package with isolated source (backside), rated for 150 °C case temperature and qualified for 15-year product longevity. Thermal path is optimized via direct source-to-heatsink contact.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRFX600HS and MRFX600GS, the MRFX600H-88MHZ offers the lowest thermal resistance and highest ruggedness margin in the MRFX600 family, making it the preferred choice for forced-air or liquid-cooled high-reliability broadcast and medical systems where thermal density and fault tolerance are critical.

Availability

MRFX600H-88MHZ is available at Aetrix Electronics and suitable for FM broadcast transmitters, MRI RF amplifiers, industrial plasma generators, and HF/VHF communications base stations requiring stable component supply and long-term lifecycle assurance.

Supply support for MRFX600H-88MHZ 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 semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and communication markets, with deep expertise in RF power technology.

The MRFX600H-88MHZ belongs to NXP's high-ruggedness LDMOS RF transistor product line, engineered specifically for mission-critical broadband amplification in industrial heating, medical imaging, and broadcast infrastructure where reliability and thermal performance are non-negotiable.

FAQ

What is the maximum continuous drain-source voltage rating for MRFX600H-88MHZ?

The MRFX600H-88MHZ has a maximum drain-source voltage (V_DSS) rating of +179 V DC, providing substantial headroom above its 65 V operational supply. This rating is confirmed in Table 1 of the official NXP datasheet (Rev. 0, Sept. 2018) and ensures robustness against voltage transients in high-VSWR RF environments. The MRFX600H-88MHZ maintains this rating across its full operating junction temperature range of –40 to +225 °C.

Does MRFX600H-88MHZ support push-pull amplifier configurations?

Yes, the MRFX600H-88MHZ is explicitly designed for both single-ended and push-pull operation, as stated in its official features list. Its dual-gate/dual-drain architecture (Gate A/Drain A and Gate B/Drain B) enables balanced drive and output combining. The device's output impedance is optimized to interface directly with a 4:1 transformer, a common requirement in push-pull RF power amplifier topologies used in broadcast and industrial systems.

What thermal resistance value applies to MRFX600H-88MHZ under continuous-wave operation?

Under continuous-wave (CW) conditions-specifically at case temperature 75 °C, 650 W output, 62 V DC, and 250 mA quiescent current per side-the MRFX600H-88MHZ exhibits a thermal resistance (R_θJC) of 0.15 °C/W, as documented in Table 2 of the NXP datasheet. This value reflects the junction-to-case path through the backside source terminal and is critical for heatsink sizing in high-power FM broadcast and MRI amplifier designs.

Is MRFX600H-88MHZ qualified for use in medical MRI systems?

Yes, MRFX600H-88MHZ is explicitly cited in NXP's typical applications list for "MRI, RF ablation and skin treatment," and its 87.5–108 MHz performance data aligns with the 87.5 MHz Larmor frequency used in 1.5 Tesla MRI systems. Its high ruggedness (>65:1 VSWR), low distortion (–27 dBc 2nd harmonic), and 15-year longevity program make it suitable for certified medical RF power amplifier modules where regulatory compliance and long-term supply stability are mandatory.

What package type does MRFX600H-88MHZ use, and how is the source terminal accessed?

The MRFX600H-88MHZ uses the NI-780H-4L air-cavity ceramic/metal package, featuring four perimeter leads (Drain A, Gate A, Drain B, Gate B) and an electrically isolated metal backside. Per Figure 1 and note in the datasheet, the backside of the package serves as the common source terminal for both internal transistors. This design requires direct mechanical and thermal attachment to a grounded heatsink, with no PCB trace connection needed for the source path.