EA5 cascadable RF amplifier IC in a four lead TO-5-4 can by RS Components. Download RS components EA5 datasheet: Status: NOS (New Old Stock) still sealed in original RS antistatic bag, comes complete with fixing collar and nuts/bollts. Cropped leads as standard to ensure correct PCB mounting, pcb grounding plane recommended. This once popular component, is now on the endangered species list. legacy RS components part number : RS 302-435 RoHS: no