ART4K0FX 4kW Peak LDMOS RF Transistor
Mfr. Part #: ART4K0FX
Manufacturer: Ampleon
Product Category: RF Power Transistor
Package / Case: ACC-1230 / SOT539A Flanged Balanced Ceramic Package
Description: 4kW peak, 75V unmatched rugged LDMOS RF power transistor designed for broadband ISM, industrial RF energy, broadcast, communication, radar and particle accelerator applications.
The Ampleon ART4K0FX is a high-power LDMOS RF transistor based on Ampleon’s Advanced Rugged Technology platform. It operates across a broadband frequency range from 1MHz to 450MHz and delivers a nominal peak output power of 4000W at 1dB gain compression under specified pulsed RF conditions.
Designed for high-power solid-state RF systems, the ART4K0FX combines kilowatt-level output, high efficiency, strong thermal stability and resistance to difficult load conditions. Its unmatched configuration allows engineers to develop external input and output matching networks for different frequencies and amplifier architectures.
ART4K0FX Specifications
| Parameter | Specification |
| Manufacturer | Ampleon |
| Part Number | ART4K0FX |
| Orderable Part Number | ART4K0FXU |
| Device Type | Rugged LDMOS RF power transistor |
| Frequency Range | 1–450MHz |
| Nominal Peak Output Power | 4000W |
| Output-Power Condition | 1dB gain compression |
| Test Signal | Pulsed RF |
| Drain Voltage at 4000W | 75V |
| Minimum Power Gain | 22.8dB |
| Typical Power Gain | 25dB |
| Typical Input Return Loss | −23dB |
| Minimum Drain Efficiency | 65% |
| Typical Drain Efficiency | 73% |
| Package | ACC-1230 / SOT539A |
| Packing | 20-unit tray |
Typical Applications
The ART4K0FX is suitable for high-power RF amplifier systems used in:
Industrial plasma generators
Semiconductor plasma-processing equipment
MRI RF power amplifiers
CO₂ laser generators
Particle accelerators
Industrial RF heating systems
Scientific RF generators
Medical RF equipment
FM radio transmitters
VHF television transmitters
Non-cellular communication systems
UHF radar equipment
High-power solid-state power amplifiers
Ampleon officially identifies industrial, scientific, medical, broadcast and communication systems as the principal application groups for the ART4K0FX.
Ordering Information
| Type Number | Orderable Part Number | Package | Packing | Status |
| ART4K0FX | ART4K0FXU | ACC-1230 / SOT539A | 20-unit tray, non-dry pack | Active |
FAQ
What is the frequency range of the ART4K0FX?
The ART4K0FX is designed for broadband operation from 1MHz to 450MHz.
Does the ART4K0FX deliver 4kW continuously?
The 4kW rating refers to nominal output at 1dB gain compression under pulsed RF conditions at 75V. Ampleon separately reports 2kW CW Class-AB performance at 65V and a 3kW CW particle-accelerator reference implementation at 75V.
What is the typical gain of the ART4K0FX?
At the specified 4kW pulsed operating point, typical power gain is 25dB, with a published minimum of 22.8dB.
What is the efficiency of the ART4K0FX?
Typical drain efficiency at the 4kW pulsed operating point is 73%. Ampleon also reports 86% efficiency at 2kW CW in Class AB and 89% efficiency at 1.2kW in Class E.
Is the ART4K0FX internally matched?
No. It is an unmatched RF power transistor. External input and output networks must be designed for the required frequency, bandwidth and amplifier class.
What is the orderable part number?
The active orderable part number is ART4K0FXU, supplied in the ACC-1230/SOT539A ceramic package.
