NXP Semiconductors MRF1K50H-230MHZ

Overview

MRF1K50H-230MHZ from NXP Semiconductors is a high-ruggedness RF power LDMOS transistor designed for pulsed VHF amplification in industrial, broadcast, and aerospace systems. At 230 MHz, it delivers 1500 W peak output power with 23.7 dB power gain and 74.0% drain efficiency under 100 µs pulse width / 20% duty cycle conditions at 50 Vdc supply. Its dual-gate/dual-drain structure supports push-pull configurations in high-VSWR environments such as plasma etching and weather radar transmitters.

For engineers reviewing the MRF1K50H-230MHZ datasheet, MRF1K50H-230MHZ pinout, MRF1K50H-230MHZ application, or MRF1K50H-230MHZ equivalent, this device requires attention to gate bias stability across temperature, thermal impedance under pulsed operation (ZθJC = 0.028 °C/W), load mismatch tolerance (>65:1 VSWR at 230 MHz), and ESD robustness (HBM Class 2, 2500 V).

Technical Context

The MRF1K50H-230MHZ is a dual-gate, dual-drain enhancement-mode lateral MOSFET optimized for narrowband pulsed RF amplification. It operates with 50 Vdc drain supply and features integrated ESD protection enabling reliable Class C operation with extended negative gate-source voltage range.

Its unmatched input/output design allows stable performance from 1.8–500 MHz, but the -230MHZ suffix denotes characterization and production test validation specifically at 230 MHz using a narrowband fixture with 100 µs pulse width and 20% duty cycle. Thermal behavior is defined by transient junction-to-case impedance (0.028 °C/W) under those exact conditions.

Key Specifications

Pinout & Package

Package: NI-1230H-4S - ceramic/metal air-cavity package with source-connected backside flange, rated for high-power RF operation up to 225°C junction temperature.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF1K50N, the MRF1K50H-230MHZ trades marginal thermal resistance for superior pulsed ruggedness validation at 230 MHz; MRFE6VS25N serves only as a driver, not a functional substitute, making direct substitution impossible without circuit redesign.

Availability

MRF1K50H-230MHZ is available at Aetrix Electronics and suitable for industrial plasma systems, aerospace VOR beacons, and VHF broadcast transmitters requiring stable component supply across extended production lifecycles.

Supply support for MRF1K50H-230MHZ 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 infrastructure markets.

The MRF1K50H-230MHZ belongs to NXP's high-power RF LDMOS transistor family, engineered for ruggedized amplification in mission-critical RF systems operating from 1.8–500 MHz with emphasis on VSWR tolerance and thermal reliability.

FAQ

What is the maximum safe operating drain voltage for MRF1K50H-230MHZ?

The MRF1K50H-230MHZ has a maximum drain-source voltage rating of +135 Vdc. However, its production-tested performance at 230 MHz uses 50 Vdc supply, and operation above this voltage requires re-characterization of gain, efficiency, and thermal behavior. Exceeding 50 Vdc voids the published 230 MHz pulse specifications for MRF1K50H-230MHZ unless validated per AN1955 thermal methodology.

Does MRF1K50H-230MHZ support push-pull configuration?

Yes, MRF1K50H-230MHZ is explicitly characterized for both single-ended and push-pull operation. Its dual-gate/dual-drain structure (Gate A/B, Drain A/B) and symmetric layout enable balanced push-pull designs without external combiners. The 230 MHz narrowband test fixture validates performance in this mode with matched gate bias paths and symmetrical output matching.

What thermal interface material is recommended for MRF1K50H-230MHZ mounting?

NXP recommends solder reflow attachment per Application Note AN1908 for MRF1K50H-230MHZ. This method uses controlled-solder attach to achieve optimal thermal contact between the source-connected flange and heatsink, minimizing interfacial resistance and supporting the specified 0.028 °C/W ZθJC under pulsed conditions.

Is MRF1K50H-230MHZ qualified for aerospace applications?

MRF1K50H-230MHZ is used in aerospace VHF communications and VOR beacon systems, supported by its 225°C junction rating, >65:1 VSWR ruggedness at 230 MHz, and inclusion in NXP's 15-year product longevity program. While not formally MIL-STD-883 qualified, its design and test validation align with DO-160 environmental stress requirements for ground-based avionics infrastructure.

How does the ESD protection in MRF1K50H-230MHZ improve Class C operation?

MRF1K50H-230MHZ features enhanced negative gate-source voltage range (–6.0 V) enabled by integrated ESD structures. This allows deeper gate cutoff during Class C conduction, improving efficiency and harmonic suppression at 230 MHz without gate leakage-induced distortion or latch-up risk during high-dV/dt switching transitions.