... . This series is equivalent to MD series of America.2. This series’ core has specifications of 9, 11, ... straight insertion type. The grid’s size is 2.54×2.54.J30J straight insertion PCB N-J series: ... bent insertion type. The grid’s size is 2.54×2.54.J30J bent insertion PCB W-J series: ... 51, 66, 74, 100TJ/ZK: TJ-plug with pin, ZK-socket with holeN: no mark-compressing connection type, S-welding ...