NXP Semiconductors MRF6P3300HR3

Overview

MRF6P3300HR3 from NXP Semiconductors (formerly Freescale) is an N-channel enhancement-mode lateral RF power MOSFET designed for broadband large-signal common-source amplifier applications in 32 V analog/digital TV transmitters. It delivers 270 W PEP output at 860 MHz with 20.2 dB power gain, 44.1% drain efficiency, and -30.8 dBc IMD under narrowband two-tone conditions. Its internal input/output matching and push-pull operation capability make it suitable for UHF broadcast amplifiers.

For engineers reviewing the MRF6P3300HR3 datasheet, MRF6P3300HR3 pinout, MRF6P3300HR3 application, or MRF6P3300HR3 equivalent, this page provides verified technical context, thermal and RF performance data across 470–860 MHz, package mechanical details, ESD protection class ratings, and validated alternative options for broadcast transmitter design continuity.

Technical Context

This device operates as a high-power RF transistor in Class AB or Class C configurations, optimized for push-pull operation only. It features internally matched 50 Ω input and output impedance networks, enabling simplified integration into broadband TV transmitter final stages without external matching components at design center frequencies.

Thermal management is critical: junction temperature must be limited to 225°C max, with case temperature capped at 150°C. Its 0.23 °C/W thermal resistance (at 300 W CW, 80°C case) supports high-reliability operation when mounted on properly heatsinked NI-860C3 flange packages with bolt-torque-controlled thermal interface.

Key Specifications

Pinout & Package

Package: NI-860C3 (Case 375G-04, Style 1), flanged ceramic/metal hermetic package with copper-tungsten base and gold-plated flange for low thermal resistance and RF grounding. Mounting bolt center: 1.140″ (28.96 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF6P3300HR3, MRFE6P3300HR3 offers identical electrical and mechanical compatibility with enhanced long-term reliability, while MRF6P27140HR5 trades upper-band coverage for improved mid-band linearity - making the former the preferred drop-in upgrade and the latter a frequency-limited alternative.

Availability

MRF6P3300HR3 is available at Aetrix Electronics and suitable for UHF broadcast transmitters, digital TV headends, and industrial RF amplifier systems requiring stable component supply and long-lifecycle support.

Supply support for MRF6P3300HR3 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 acquired Freescale Semiconductor in 2015 and continues to support its RF power portfolio for broadcast, industrial, and aerospace applications.

The MRF6P3300HR3 belongs to NXP's LDMOS RF power transistor family, engineered specifically for high-efficiency, high-linearity UHF broadcast amplifier applications demanding ruggedness and thermal stability.

FAQ

What is the maximum continuous drain current rating for the MRF6P3300HR3?

The MRF6P3300HR3 does not specify a maximum continuous drain current (ID) rating in its datasheet. Instead, it defines safe operating limits via quiescent drain current (IDQ = 1600 mA), maximum junction temperature (225°C), and thermal resistance (0.23 °C/W). Designers must calculate actual ID based on applied VDD, output power, and efficiency - for example, at 32 V and 270 W PEP with 44.1% efficiency, average DC current is ~19.2 A, but pulsed operation keeps RMS current within thermal limits. The MRF6P3300HR3 relies on thermal design, not current rating, for safe operation.

Is the MRF6P3300HR3 suitable for single-ended amplifier configurations?

No, the MRF6P3300HR3 is explicitly designed for push-pull operation only, as stated in its Freescale documentation. Its pinout (dual drain, dual gate, single source) and internal structure assume balanced drive and load symmetry. Attempting single-ended use violates the device's qualified operating conditions, risks thermal imbalance, degrades IMD performance, and voids reliability guarantees. The MRF6P3300HR3 must be used in a true push-pull circuit with matched input/output networks and differential biasing.

What is the gate threshold voltage range for the MRF6P3300HR3?

The MRF6P3300HR3 has a gate threshold voltage (VGS(th)) range of 1.0–3.0 Vdc, measured at VDS = 10 Vdc and ID = 350 μAdc. This parameter reflects the minimum gate voltage needed to initiate conduction. However, normal operation uses a quiescent gate voltage (VGS(Q)) of 2.0–4.0 Vdc at IDQ = 1600 mA and VDD = 32 Vdc - significantly higher than threshold - to ensure deep Class AB biasing and optimal linearity. The MRF6P3300HR3 requires precise gate bias control to maintain stable IDQ across temperature.

Does the MRF6P3300HR3 require external gate protection diodes?

No, the MRF6P3300HR3 includes integrated ESD protection rated to HBM Class 3B (≥8 kV), Machine Model Class C (≥400 V), and CDM Class IV. External gate protection diodes are not required for standard handling or circuit operation. However, designers must still observe proper PCB layout practices: minimize gate trace inductance, avoid floating gate nodes, and ensure stable, low-noise bias supplies. The MRF6P3300HR3's internal protection covers assembly and transient events but not sustained overvoltage or incorrect bias sequencing.

What is the thermal resistance junction-to-case for the MRF6P3300HR3 at 300 W CW operation?

The MRF6P3300HR3 has a thermal resistance (RθJC) of 0.23 °C/W when operated at 300 W CW with case temperature maintained at 80°C, as specified in Table 2 of its datasheet. This value assumes optimal mounting: flat, clean flange surface; recommended 3M screw torque; and thermally conductive interface material. At lower power levels (e.g., 60 W avg), RθJC rises to 0.27 °C/W due to non-uniform heating. Accurate thermal design for the MRF6P3300HR3 must use the appropriate RθJC value corresponding to the actual operating condition and case temperature.