NXP Semiconductors MRF24G300HS-2STG

Overview

MRF24G300HS-2STG from NXP Semiconductors is a 300 W CW GaN-on-SiC RF power transistor designed for industrial, scientific, and medical (ISM) applications at 2450 MHz. It delivers 332 W output power, 15.2 dB power gain, and 73.0% drain efficiency at 2450 MHz under CW operation with V_DD = 48 V and V_GS(A+B) = –5 V. Its ruggedized design supports pulse, cycling, and linear operation in microwave ablation and plasma generation systems.

For engineers reviewing the MRF24G300HS-2STG datasheet, MRF24G300HS-2STG pinout, MRF24G300HS-2STG application, or MRF24G300HS-2STG equivalent, key selection criteria include guaranteed 2400–2500 MHz band performance, 125 V_DSS rating, 350 °C max channel temperature, input-matched configuration, and NI-780S-4L package thermal resistance of 0.52 °C/W.

Technical Context

This dual-gate GaN HEMT operates in depletion mode and requires precise bias sequencing: gate voltage must be set to –5 V before applying drain voltage, and gate must return to –5 V before reducing drain voltage to avoid device damage. It supports both single-ended and push-pull configurations with matched input impedance across 2400–2500 MHz.

Thermal management is critical: R_θJC(IR) = 0.52 °C/W enables high-power CW operation only when mounted on a heatsink per AN1908 reflow guidelines; reliability modeling uses R_θCHC(FEA) = 0.72 °C/W and MTTF = 10^{[–10.3 + 8263/(T_CH + 273)]} hours.

Key Specifications

Pinout & Package

The MRF24G300HS-2STG is housed in the NI-780S-4L air-cavity ceramic package. The backside metal serves as the common source terminal. Device mounting must follow AN1908 reflow profile for reliable solder joint integrity under high thermal cycling stress.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MRF24G300HS-2STG, CGHV1F025S offers lower power and reduced ruggedness, while BLF2425M9LS trades GaN efficiency and gain for LDMOS process familiarity and slightly better thermal resistance - neither is pin-compatible, and both require circuit redesign for replacement.

Availability

MRF24G300HS-2STG is available at Aetrix Electronics and suitable for industrial heating, plasma generation, and medical diathermy systems requiring stable component supply, long-lifecycle support, and traceable GaN transistor sourcing.

Supply support for MRF24G300HS-2STG 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 IoT markets, with deep expertise in RF power technologies.

The MRF24G300HS-2STG belongs to NXP's high-power GaN transistor product line, engineered specifically for demanding ISM-band applications requiring high efficiency, thermal resilience, and operational ruggedness at 2450 MHz.

FAQ

What is the maximum continuous drain voltage rating for the MRF24G300HS-2STG?

The MRF24G300HS-2STG has a maximum drain-source voltage (V_DSS) rating of 125 Vdc, with recommended operating voltage (V_DD) up to +55 Vdc. This rating ensures safe operation under transient conditions in industrial RF amplifiers. The MRF24G300HS-2STG must never be biased above its absolute maximum V_DSS limit, even momentarily, to prevent irreversible die damage.

Does the MRF24G300HS-2STG require external input matching networks?

The MRF24G300HS-2STG features an input-matched architecture optimized for 2400–2500 MHz operation, with Z_source = 2.55 – j2.72 Ω at 2450 MHz. While it reduces matching complexity, a minimal broadband network is still required to transform 50 Ω system impedance to the device's optimal input impedance. The MRF24G300HS-2STG reference circuit (documented in Rev. 0, Sept. 2019) specifies exact capacitor values for this purpose.

How should the MRF24G300HS-2STG be biased during turn-on and turn-off sequences?

The MRF24G300HS-2STG is a depletion-mode GaN transistor requiring strict bias sequencing: during turn-on, V_GS(A+B) must be set to –5 Vdc *before* applying V_DD; during turn-off, RF input must be removed first, then V_GS returned to –5 Vdc, and finally V_DD ramped to zero. Failure to follow this sequence risks catastrophic failure. The MRF24G300HS-2STG datasheet (page 3) explicitly defines this procedure.

What thermal interface material and mounting method are recommended for the MRF24G300HS-2STG?

NXP recommends solder reflow attachment per Application Note AN1908 for the MRF24G300HS-2STG, using eutectic AuSn preform or high-temperature PbSn solder on a copper heatsink. Thermal interface materials (TIMs) are *not* recommended - direct solder provides lowest R_θJC (0.52 °C/W). The MRF24G300HS-2STG backside source must make full-area contact with the heatsink; voids or non-uniform solder joints degrade thermal performance and reliability.

Is the MRF24G300HS-2STG suitable for pulsed RF applications, and what are its pulse ruggedness limits?

Yes, the MRF24G300HS-2STG is characterized for long-pulse (up to several seconds) and short-pulse operation. It demonstrates load mismatch ruggedness of >20:1 VSWR at all phase angles under 100 µsec pulse width and 20% duty cycle at 2450 MHz, with peak input power of 12.6 W and test voltage of 55 V. This makes the MRF24G300HS-2STG suitable for radar simulation and pulsed plasma ignition where impedance stability cannot be guaranteed.