NXP Semiconductors MRF1K50H-TF2

Overview

MRF1K50H-TF2 from NXP Semiconductors is a high-ruggedness, 50 V, 1500 W CW RF power LDMOS transistor designed for broadband industrial, broadcast, aerospace, and mobile radio amplifiers operating from 1.8 to 500 MHz. It delivers 1475 W output at 87.5–108 MHz with 23.3 dB power gain and 83.4% drain efficiency under CW conditions, and sustains >65:1 load VSWR at 230 MHz without degradation.

For engineers reviewing the MRF1K50H-TF2 datasheet, MRF1K50H-TF2 pinout, MRF1K50H-TF2 application, or MRF1K50H-TF2 equivalent, this device is selected for high-reliability RF final-stage amplification where wideband operation, avalanche energy tolerance, and thermal robustness are critical - especially in ISM plasma systems, VHF TV transmitters, and airborne communications.

Technical Context

The MRF1K50H-TF2 is a dual-gate, dual-drain enhancement-mode lateral MOSFET with source-connected package backside. Its unmatched input/output impedance enables stable broadband matching across 1.8–500 MHz without external tuning networks in reference circuits. The device operates in Class AB or Class C with gate threshold voltage of 1.7–2.7 V and supports quiescent drain current up to 200 mA per side.

Thermal design leverages a low 0.10 °C/W junction-to-case resistance (CW, 78°C case) and integrated ESD protection rated to 2500 V HBM. It is characterized for 30–50 V supply operation and validated for ruggedness testing at 230 MHz with 100 µs pulse width and 20% duty cycle under 3 dB overdrive.

Key Specifications

Pinout & Package

Package: NI-1230H-4S - ceramic/metal air-cavity package with solderable flange, 4-terminal top-side layout, source connected to package backside.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF1K50N, the MRF1K50H-TF2 trades marginal thermal performance for broader legacy compatibility and identical pinout in NI-1230H-4S; versus MRFE6VP61K25H, it offers higher CW power and ruggedness at the expense of upper-frequency reach and voltage flexibility.

Availability

MRF1K50H-TF2 is available at Aetrix Electronics and suitable for industrial heating systems, broadcast transmitters, and aerospace VHF communications requiring stable component supply across extended production lifecycles.

Supply support for MRF1K50H-TF2 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 communications markets, with deep expertise in RF power technology since the acquisition of Freescale.

The MRF1K50H-TF2 belongs to NXP's high-ruggedness RF LDMOS portfolio, engineered specifically for mission-critical amplification in ISM, broadcast, and defense applications where reliability under extreme VSWR and thermal stress is non-negotiable.

FAQ

What is the maximum continuous drain current rating for the MRF1K50H-TF2?

The MRF1K50H-TF2 does not specify a maximum continuous drain current in absolute amperes; instead, its safe operating area is defined by junction temperature (≤+225°C), case temperature (≤+150°C), and thermal resistance. Under typical 1500 W CW operation at 50 V, total DC drain current is approximately 30 A, split across both cells. The device is characterized for IDQ(A+B) = 100–200 mA quiescent current in linear operation, and pulsed operation supports peak currents exceeding 100 A.

Does the MRF1K50H-TF2 require external gate protection diodes?

No, the MRF1K50H-TF2 integrates on-die ESD protection rated to 2500 V HBM, 250 V MM, and 2000 V CDM, and supports gate-source voltage from –6.0 V to +10 V. External gate protection is unnecessary in properly designed PCB layouts with controlled impedance gate traces and local decoupling. However, transient voltage suppressors may still be used in high-noise RF environments per system-level EMC requirements.

Can the MRF1K50H-TF2 be operated in Class C mode?

Yes, the MRF1K50H-TF2 is qualified for Class C operation, enabled by its extended negative gate-source voltage range (–6.0 V) and robust avalanche capability. The datasheet explicitly states suitability for Class C in the Features section and validates load mismatch performance under overdrive conditions. Bias must be set below threshold (typically VGS(Q) ≈ 1.9–2.9 V) and gate drive must avoid excessive negative swing beyond –6 V.

What is the recommended heatsink mounting torque for the MRF1K50H-TF2 package?

The MRF1K50H-TF2 uses an NI-1230H-4S package with a ceramic/metal flange requiring uniform mechanical compression for optimal thermal transfer. NXP recommends a mounting torque of 20–25 in·lb (2.26–2.82 N·m) per screw using four M3.5 screws in diagonal sequence. Thermal interface material must be applied per AN1908 guidelines, and flatness of heatsink surface must be ≤0.001″ (25 µm) to prevent localized hot spots.

Is the MRF1K50H-TF2 pin-compatible with earlier MRF1K50H variants?

Yes, the MRF1K50H-TF2 maintains full pin-to-pin and package compatibility with all prior MRF1K50H variants (e.g., MRF1K50HR5), including identical NI-1230H-4S footprint, terminal assignments, and flange mounting dimensions. The "TF2" suffix denotes tape-and-reel packaging variant (50 units/reel, 56 mm tape width) and does not reflect electrical or mechanical changes to the die or package.