RD30HVF1.  Red Part No RB17.   

Mitsubishi RD30HVF1 VHF 30W PA MOSFET.  

Also known as Maxon Part No 881-690030HV

Used in a high number of Mobile Two way radios and Data radios as Transmitter PA device.  This device is used extensively in many high power radio transmitters.

This is an original Part, manufactured by Mitsubishi and used in many radios, but now obsolete and no longer manufactured.  Once our stock is run out we will not be able to source more.