NXP Semiconductors MRFX600HR5

Overview

MRFX600HR5 from NXP Semiconductors is a high-ruggedness, 600 W peak, 65 V LDMOS RF power transistor designed for broadband industrial and broadcast amplifiers operating from 1.8 to 400 MHz. It delivers 26.4 dB power gain and 74.4% drain efficiency at 230 MHz under pulsed conditions (100 µs, 20% duty cycle), with >65:1 load VSWR tolerance and integrated ESD protection. It serves as the active RF power stage in MRI systems, plasma generators, and HF/VHF base stations.

For engineers reviewing the MRFX600HR5 datasheet, MRFX600HR5 pinout, MRFX600HR5 application, or MRFX600HR5 equivalent, key selection criteria include its 65 V maximum drain-source voltage, 225 °C junction temperature rating, unmatched input/output impedance architecture, and NI-780H-4L air-cavity package suitability for forced-air or liquid-cooled RF PA designs.

Technical Context

This dual-gate, dual-drain lateral MOSFET operates in enhancement mode with separate Gate A/Gate B and Drain A/Drain B terminals, enabling single-ended or push-pull configurations. Its 179 Vdc breakdown voltage and –40 to +225 °C junction temperature range support high-reliability operation under extreme mismatch and thermal stress.

The device features a thermally optimized NI-780H-4L package with source-connected backside metal, delivering 0.037 °C/W pulse-mode thermal impedance and 0.15 °C/W CW thermal resistance. Its Ciss = 299 pF, Crss = 1.1 pF, and Coss = 84 pF enable stable broadband matching from 87.5–108 MHz and 230 MHz production test bands.

Key Specifications

Pinout & Package

The MRFX600HR5 is housed in the NI-780H-4L air-cavity ceramic/metal package with solderable flange and gull-wing leads. The backside metallization serves as the common source terminal. Thermal path is optimized via direct die-to-flange attachment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRFX600HR5, MRFX600HSR5 offers identical RF performance in a narrower tape format for high-speed placement, while MRFX600GSR5 provides gull-wing leads for simplified hand-soldering and thermal pad access-neither is pin-compatible without board redesign due to differing lead pitch and flange cutouts.

Availability

MRFX600HR5 is available at Aetrix Electronics and suitable for industrial heating systems, broadcast transmitters, and medical RF ablation equipment requiring stable component supply across multi-year production programs.

Supply support for MRFX600HR5 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications.

The MRFX600HR5 belongs to NXP's high-ruggedness RF power LDMOS family, engineered specifically for mission-critical broadband amplification in medical, broadcast, and aerospace systems demanding extreme reliability and thermal resilience.

FAQ

What is the maximum continuous drain voltage rating for MRFX600HR5?

The MRFX600HR5 has a maximum drain-source voltage (V_DSS) rating of +179 Vdc, providing substantial overvoltage margin above its 65 V nominal operating rail. This specification is confirmed in Table 1 of the official NXP datasheet (Rev. 0, Sept. 2018) and directly supports operation under transient overvoltage and high-VSWR conditions without breakdown. The MRFX600HR5 maintains this rating across its full operating temperature range.

Does MRFX600HR5 require external ESD protection on the gate terminals?

No, MRFX600HR5 incorporates integrated ESD protection rated to Human Body Model Class 2 (2500 V) and Charge Device Model Class C3 (1000 V), as documented in Table 3 of the NXP datasheet. This eliminates the need for discrete gate-protection components in standard PCB layouts. The MRFX600HR5's enhanced negative gate-source voltage range further supports robust Class C operation without additional clamping circuitry.

Can MRFX600HR5 be operated in push-pull configuration?

Yes, MRFX600HR5 is explicitly characterized and qualified for both single-ended and push-pull configurations, as stated in the "Features" section of the NXP datasheet. Its symmetrical dual-gate/dual-drain structure (Gate A/Gate B, Drain A/Drain B) and matched device parameters enable balanced operation. The MRFX600HR5's output impedance is designed to interface directly with a 4:1 transformer in push-pull mode, simplifying combiner design.

What thermal resistance value applies to MRFX600HR5 under continuous wave (CW) operation?

Under CW conditions (650 W, 62 Vdc, 98 MHz, T_C = 75 °C), the MRFX600HR5 exhibits a junction-to-case thermal resistance (R_θJC) of 0.15 °C/W, per Table 2 in the NXP datasheet. This value assumes proper mounting to a flat, smooth heatsink with recommended thermal interface material and bolt torque. The MRFX600HR5's NI-780H-4L package enables this low thermal resistance via direct die-to-flange conduction.

Is MRFX600HR5 suitable for linear amplifier applications such as Doherty or envelope tracking?

Yes, MRFX600HR5 is specified for linear operation with appropriate biasing, as noted in the "Features" section of the NXP datasheet. Its high linearity (confirmed by harmonic measurements showing –15 dBc third harmonic at 87.5 MHz), low Crss (1.1 pF), and stable gain across drive level make it suitable for Doherty PA architectures and envelope-tracking systems. The MRFX600HR5's characterization up to 65 V and 225 °C junction temperature further supports dynamic bias schemes requiring wide operating margins.