NXP Semiconductors MRFX1K80NR5

Overview

MRFX1K80NR5 from NXP Semiconductors is a high-ruggedness, 1800 W peak, 65 V drain–source voltage, N-channel enhancement-mode LDMOS RF power transistor designed for broadband industrial and broadcast amplifiers operating from 1.8 to 400 MHz. It delivers 24.4 dB power gain and 75.7% drain efficiency at 230 MHz under pulsed conditions (100 µs, 20% duty cycle), with >65:1 load VSWR tolerance and 0.009 °C/W thermal impedance.

For engineers reviewing the MRFX1K80NR5 datasheet, MRFX1K80NR5 pinout, MRFX1K80NR5 application, or MRFX1K80NR5 equivalent, this page provides verified electrical specs, ruggedness validation, thermal performance data, package mechanical details, and real-world use cases in plasma generation, MRI RF ablation, HF radar, and broadcast transmitters - all critical for high-reliability RF PA design and qualification.

Technical Context

This dual-gate, dual-drain LDMOS device operates in push–pull or single-ended configurations with unmatched input/output ports enabling wideband operation across 1.8–400 MHz. Its lateral structure supports 65 V DC operation, 225 °C maximum junction temperature, and integrated ESD protection (HBM Class 2, CDM Class C3).

Thermal management is enabled by a low R_θJC of 0.06 °C/W (CW) and Z_θJC of 0.009 °C/W (pulse), validated at 1800 W peak output. The device is characterized from 30–65 V_DD, with gate threshold voltage of 2.5 V typical and zero-bias drain leakage <10 µA at 65 V_DS.

Key Specifications

Pinout & Package

The MRFX1K80NR5 uses the OM-1230-4L plastic overmolded package with exposed source on the backside. Thermal interface requires direct mounting to heatsink via conductive pad; no solder reflow required per AN1907.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRFX1K80GNR5, the MRFX1K80NR5 offers identical RF performance but lower-cost lead finish; compared with MRF1K50N, it delivers +300 W peak power, +15 V higher V_DD headroom, and superior thermal and mismatch resilience - making it essential for mission-critical 1.8–400 MHz amplifiers demanding 15-year supply assurance.

Availability

MRFX1K80NR5 is available at Aetrix Electronics and suitable for industrial plasma systems, MRI ablation equipment, HF radar transceivers, and VHF broadcast transmitters requiring stable component supply across long production lifecycles.

Supply support for MRFX1K80NR5 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 rugged LDMOS and GaN transistors for industrial, broadcast, and aerospace applications.

The MRFX1K80NR5 belongs to NXP's Wideband RF Power LDMOS family, engineered specifically for high-VSWR, high-efficiency amplification across 1.8–400 MHz in demanding linear and pulsed systems.

FAQ

What is the maximum continuous drain current rating for MRFX1K80NR5?

The MRFX1K80NR5 does not specify a maximum continuous drain current (I_D) rating. Instead, its safe operating area is defined by total device dissipation (3333 W @ T_C = 25 °C), junction temperature limit (225 °C), and thermal resistance (0.06 °C/W). Designers must calculate I_D based on actual V_DS, duty cycle, and heatsink performance - for example, at 65 V_DD and 1800 W peak, average current remains within safe limits when operated per the 230 MHz narrowband test conditions in the MRFX1K80NR5 datasheet.

Does MRFX1K80NR5 require external gate protection diodes?

No, MRFX1K80NR5 includes integrated ESD protection rated to 2500 V HBM and 1200 V CDM, and supports gate–source voltage from –6.0 V to +10 V. External gate protection diodes are not required in standard RF PA layouts, though proper PCB layout (short traces, ground shielding) and controlled gate drive slew rates remain essential to prevent oscillation or overvoltage during switching transients in the MRFX1K80NR5 application.

Can MRFX1K80NR5 be used in Class C amplifier configurations?

Yes, MRFX1K80NR5 is suitable for Class C operation due to its extended negative gate–source voltage range (–6.0 V) and robust breakdown characteristics (V_(BR)DSS = 179 V min). The device's integrated ESD protection and high ruggedness enable stable nonlinear operation in tuned RF power amplifiers - however, bias point selection, harmonic filtering, and load-pull validation must follow NXP's recommended Class C design guidelines for the MRFX1K80NR5.

What is the recommended gate bias voltage for linear operation of MRFX1K80NR5?

For linear Class AB operation, the MRFX1K80NR5 gate quiescent voltage (V_GS(Q)) is specified as 2.5–3.3 V at I_DQ(A+B) = 100 mA and V_DD = 65 V. Typical design targets 2.9 V to balance linearity, gain, and efficiency. This value is validated in both the 87.5–108 MHz broadband reference circuit (IDQ = 200 mA) and 230 MHz narrowband test fixture (IDQ = 100 mA), as documented in the MRFX1K80NR5 datasheet Tables 5 and 8.

Is MRFX1K80NR5 pin-compatible with MRFX1K80GNR5?

Yes, MRFX1K80NR5 and MRFX1K80GNR5 share identical pinout, package outline (OM-1230-4L), and electrical specifications. The only difference is the lead finish: MRFX1K80NR5 uses standard matte tin, while MRFX1K80GNR5 uses gold plating for improved corrosion resistance and solderability in high-reliability assembly. Both devices mount identically and may be interchanged without PCB changes in the MRFX1K80NR5 footprint.