The RA45H4047M is a 45-watt RF MOSFET Amplifier Module for 12.5-volt mobile radios that operate in the 400- to 470-MHz range. It features enhancement-mode MOSFET transistors, high output power, broad frequency range, low-power control current, and the ability for linear operation.
The RA45H4047M is a 45‑watt RF MOSFET amplifier module designed for 12.5‑V mobile radios operating in the 400‑470 MHz band. It features enhancement‑mode MOSFET transistors, low‑power gate control (1 mA typ) and a compact 66 × 21 × 9.88 mm package. The module can be used for non‑linear FM modulation or linear AM modulation by adjusting gate voltage and input power.
The document provides electrical characteristics, maximum ratings, thermal design recommendations, mounting instructions, and safety precautions. Proper ESD protection, heat‑sink flatness, and torque (4.0‑6.0 kgf‑cm for M3 screws) are required for reliable operation. RoHS compliance is indicated by a “G” marking.
| Frequency Range | 400‑470 MHz |
|---|---|
| Output Power | 45 W |
| Supply Voltage (Vpp) | 12.5 V |
| Gate Control Current | 1 mA (typ) |
| Package Size | 66 × 21 × 9.88 mm |
| Operating Temperature Range (case) | -30 °C to +110 °C |
| Input VSWR | 3:1 |
The nominal output power becomes available at about 4.5 V typical and 5 V maximum.
The MOSFET module is sensitive to ESD voltages down to 1000 V, so proper ESD precautions are required.
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.