NXP Semiconductors MRF1K50H-13MHZ

Overview

MRF1K50H-13MHZ from NXP Semiconductors is a high-ruggedness, 1500 W CW RF power LDMOS transistor designed for industrial, broadcast, aerospace and mobile radio amplifiers operating from 1.8–500 MHz. It features dual-gate/dual-drain architecture, 50 Vdc operation, 78.3% drain efficiency at 27 MHz, and >65:1 load mismatch tolerance at 230 MHz under pulse conditions.

For engineers reviewing the MRF1K50H-13MHZ datasheet, MRF1K50H-13MHZ pinout, MRF1K50H-13MHZ application, or MRF1K50H-13MHZ equivalent, this device serves as a ruggedized broadband RF amplifier stage in high-VSWR environments including plasma etching, VHF TV broadcast transmitters, and weather radar front-ends - where avalanche energy handling and thermal stability are critical selection criteria.

Technical Context

The MRF1K50H-13MHZ implements a lateral N-channel enhancement-mode LDMOS structure with integrated ESD protection and a negative gate-source voltage range optimized for Class C operation. Its unmatched input/output design enables broadband matching across 1.8–500 MHz without external tuning networks in reference circuits.

It operates in push-pull or single-ended configurations, supports quiescent current adjustment from 100 mA to 900 mA per side, and delivers 23.7 dB power gain with 74.0% drain efficiency at 230 MHz under 100 µs/20% duty cycle pulse conditions - validated using NXP's NI-1230H-4S air-cavity package and production test fixture.

Key Specifications

Pinout & Package

The MRF1K50H-13MHZ is housed in the NI-1230H-4S air-cavity ceramic/metal package. The backside of the package serves as the common source terminal. Pin connections are viewed from top side (lead side down).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF1K50N and MRFE6VP61K25H, the MRF1K50H-13MHZ offers the best combination of ultra-wideband coverage (1.8–500 MHz), proven 1500 W CW capability, and ruggedness for industrial and broadcast use - while maintaining compatibility with existing NI-1230H-4S heatsink tooling and legacy reference designs.

Availability

MRF1K50H-13MHZ is available at Aetrix Electronics and suitable for industrial plasma systems, VHF TV broadcast transmitters, and aerospace weather radar requiring stable component supply across multi-year production cycles.

Supply support for MRF1K50H-13MHZ 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 LDMOS and GaN transistors for mission-critical infrastructure applications.

The MRF1K50H-13MHZ belongs to NXP's high-ruggedness RF power LDMOS family, engineered specifically for industrial, scientific, medical, broadcast, and aerospace amplifiers demanding extreme VSWR tolerance and long-term reliability.

FAQ

What is the maximum continuous drain current rating for the MRF1K50H-13MHZ?

The MRF1K50H-13MHZ does not specify a maximum continuous drain current in absolute amperes; instead, its safe operating area is defined by total device dissipation (1667 W @ TC = 25°C), junction temperature limit (+225°C), and thermal resistance (0.10°C/W). At 50 Vdc and 1500 W CW output, typical total drain current is approximately 30 A (summed across both sides), but actual current depends on bias point, efficiency, and thermal management. Always verify current density against SOA curves in the official datasheet.

Does the MRF1K50H-13MHZ require external gate protection diodes?

No, the MRF1K50H-13MHZ integrates ESD protection that meets HBM 2500 V, MM 250 V, and CDM 2000 V standards. External gate protection diodes are not required for standard handling or circuit operation. However, in systems exposed to lightning-induced surges or high-energy RF feedback, additional transient suppression at the gate input may still be recommended based on system-level immunity requirements.

Can the MRF1K50H-13MHZ operate at 13 MHz as indicated in its part number?

Yes - the "13MHZ" suffix denotes qualification and characterization at 13 MHz, which falls well within the device's specified 1.8–500 MHz operating range. NXP validates ruggedness at 230 MHz and performance at 27 MHz, 81.36 MHz, and 87.5–108 MHz, confirming full functionality at 13 MHz. Reference circuits and impedance data confirm stable gain and efficiency down to sub-30 MHz frequencies.

What is the recommended gate bias voltage for Class AB operation of the MRF1K50H-13MHZ?

The MRF1K50H-13MHZ specifies a gate quiescent voltage (VGS(Q)) range of 1.9–2.9 Vdc at IDQ(A+B) = 100 mA and VDD = 50 Vdc. For Class AB operation targeting 200 mA total quiescent current, typical VGS(Q) is 2.4 Vdc per gate. Bias must be applied independently to Gate A and Gate B; use low-noise, well-filtered DC supplies with local decoupling to prevent oscillation.

Is the MRF1K50H-13MHZ pin-compatible with earlier NXP MRF1K50 variants like MRF1K50HR5?

Yes - the MRF1K50H-13MHZ uses the identical NI-1230H-4S package and pinout as all MRF1K50H-series devices, including MRF1K50HR5. The "R5" suffix indicates tape-and-reel packaging (50 units/reel), while "-13MHZ" denotes frequency-specific characterization. Electrical specifications, thermal behavior, and mechanical mounting are fully consistent across these variants.