RA55H3847M is a 55-watt RF power amplifier module for 12.5-volt mobile radios that operate in the 380- to 470-MHz range.
The RA55H3847M is a 55‑watt RF MOSFET amplifier module designed for 12.5‑V mobile radios operating in the 380‑470 MHz band. It features a three‑stage design, low‑power gate control (≈1 mA at 5 V) and can be used for both non‑linear FM and linear AM modulation.
The document provides maximum ratings, electrical characteristics, typical performance curves, mechanical drawing, test setup, recommended mounting, thermal design, and safety precautions for reliable integration into mobile radio equipment.
| Frequency Range | 380‑470 MHz |
|---|---|
| Output Power | 55 W |
| Drain Voltage (Vpp) | 12.5 V |
| Input Power (Pin) | 100 mW |
| Typical Gate Current | 1 mA at Veg=5 V |
| Total Efficiency | 38 % |
| Package Size | 66 × 21 × 9.88 mm |
| Operating Temperature Range | -30 °C to +110 °C |
| Storage Temperature Range | -40 °C to +110 °C |
The nominal output power becomes available at a gate voltage of about 4.5 V typical and up to 5 V maximum.
M3 screws should be tightened to a torque of 4.0 to 6.0 kgf‑cm.
RoHS compliance is indicated by the letter “G” after the lot marking.