What is different between SA244 and SA411A ?
SA244 uses auto eject type socket, which causes friction when a device is inserted or removed causing wear on the socket. SA411A uses clamshell type socket which doesn’t cause any friction therefore more reliable. SA411A adapter costs more. These two socket adapter are compatible. You can buy SA411A instead of SA244. SA244 or SA244-B006 are the same adapters and most popular. All PLCC44 devices use this adapter. SA244-B4403 is an old adapter used for SuperPro Z, which has only a 40pin DIP socket.