The Adams Rite 31-0619 is the Circuit Board that controls the Motorized Latch Retraction on the 8000 and 3000 Series Exit Devices. It is also known as the PCBA: SE Main (Black).
Adams Rite 91-0993-IP 8700/8800 Strike is used on the rim devices that have the Star Wheel Latching System. The strike measures 2-3/4" long by 1-3/4" wide and projects out approximately 1/2". Kit comes with mounting screws and two shims.
The Adams Rite EL8600 Solenoid 31-0833-IP is used on their Concealed Vertical Rod. It uses 28 VDC. If your Solenoid is Red or White, then you would need the EL8800 Solenoid.