CJ78M05

CJ78M05 is the TO-252-2L ordering code for the CJ (Changjing) three-terminal positive voltage regulator, given in full - with no suffix - in the current CJ datasheet (Rev. 2.1) published on the manufacturer site. It delivers a fixed 5 V output held between 4.85 V and 5.15 V at a 10 V input and 350 mA load (4.75 V to 5.25 V over the full line and load range), a maximum output current of 0.5 A, quiescent current of 4.2 mA typical and 6 mA maximum, a dropout voltage of 2 V typical and 2.5 V maximum at 350 mA, a maximum input voltage of 35 V and a typical short-circuit current of 300 mA. The selection point is the classic mid-current 5 V rail in a surface-mount power package: control boards and auxiliary supplies get the documented Changjing variant of the 78M05 class with manufacturer-published electrical limits. Selection advice: the 0.5 A M-grade current class is the match point - the full-size 78-series codes and the smaller 78L codes are different current classes on different footprints, so quote the complete CJ78M05 code rather than a generic 7805 description. Parameters verified against the CJ CJ78M05 datasheet Rev. 2.1 (TO-252-2L edition, electrical characteristics).