CLS3H2731L-700 700W 2.7–3.1GHz S-Band Radar GaN HEMT
Mfr. Part #: CLS3H2731L-700
Manufacturer: Ampleon
Product Category: RF Power Transistor
Technology: GaN-on-SiC HEMT
Package / Case: ACC-780 / SOT502A Flanged Ceramic Package
Description: 700W internally matched GaN-on-SiC HEMT RF power transistor designed for 2.7–3.1GHz long-pulse S-band radar amplifiers and 2856MHz solid-state particle accelerator systems.
CLS3H2731L-700 700W S-Band Radar GaN HEMT
The Ampleon CLS3H2731L-700 is a high-power GaN-on-SiC HEMT transistor developed for long-pulse S-band radar transmitters operating from 2.7GHz to 3.1GHz.
The device delivers a nominal output power of 700W and more than 700W typical output at 2900MHz. It operates from a 50V drain supply and provides 13dB typical power gain with 54% typical drain efficiency under Ampleon’s specified pulsed-CW test conditions.
Its internally pre-matched and post-matched architecture, high input impedance, low thermal resistance and long-pulse capability help simplify the development of high-power radar amplifier modules. The transistor is also suitable for solid-state particle accelerator amplifiers operating at 2856MHz.
CLS3H2731L-700 Specifications
| Parameter | Specification |
| Manufacturer | Ampleon |
| Part Number | CLS3H2731L-700 |
| Orderable Part Number | CLS3H2731L-700U |
| Device Type | GaN-on-SiC RF power HEMT |
| Frequency Range | 2700–3100MHz |
| Nominal Output Power | 700W at 3dB compression |
| Typical Output Power | More than 700W at 2900MHz |
| Test Signal | Pulsed CW |
| Drain-Source Voltage | 50V |
| Typical Power Gain | 13dB |
| Typical Drain Efficiency | 54% |
| Typical Input Return Loss | 8dB |
| Long-Pulse Capability | 300μs at 10% duty cycle |
| RF Matching | Internally pre-matched and post-matched |
| Package | ACC-780 / SOT502A |
| Packing | 20-unit tray, non-dry pack |
Typical Applications
The CLS3H2731L-700 is suitable for RF power amplifiers used in:
Air-traffic-control radar
Weather radar
Ground-surveillance radar
Coastal and naval radar
Defence radar systems
ERP radar transmitters
CHIRP radar transmitters
Long-pulse S-band radar
Industrial radar equipment
Scientific RF systems
Particle accelerators operating at 2856MHz
Modular solid-state power amplifiers
Ampleon officially identifies 2.7–3.1GHz ERP and CHIRP radar power amplifiers and 2856MHz particle-accelerator amplifiers as the device’s principal applications.
CLS3H2731L-700 and CLS3H2731LS-700
Ampleon offers two package versions covering the same 2.7–3.1GHz frequency range:
| Type Number | Package | Package Style |
| CLS3H2731L-700 | SOT502A | Flanged ceramic package |
| CLS3H2731LS-700 | SOT502B | Earless ceramic package |
Ordering Information
| Type Number | Orderable Part Number | Package | Packing | Status |
| CLS3H2731L-700 | CLS3H2731L-700U | ACC-780 / SOT502A | 20-unit tray | Active |
FAQ
What is the frequency range of the CLS3H2731L-700?
The device operates from 2700MHz to 3100MHz, covering the low S-band radar frequency range.
What is the output power?
The CLS3H2731L-700 has a nominal output rating of 700W at 3dB gain compression and provides more than 700W typical output at 2900MHz under specified pulsed-CW conditions.
What are its typical gain and efficiency?
At 2900MHz, the transistor provides 13dB typical power gain and 54% typical drain efficiency. Ampleon’s demonstration-amplifier data indicates approximately 56–58% efficiency across the complete operating band.
Does it support long-pulse radar operation?
Yes. The device supports pulse lengths of up to 300μs at a 10% duty cycle.
Is the CLS3H2731L-700 internally matched?
Yes. It is internally pre-matched and post-matched to simplify external amplifier matching and improve design integration.
What is the operating voltage?
The published RF performance is specified with a 50V drain-source supply.
What is the orderable part number?
The active orderable part number is CLS3H2731L-700U, supplied in the ACC-780/SOT502A flanged ceramic package.
