CJ

CJ is the catalog short name for Jiangsu Changjing Electronics, the Chinese maker behind the 78L, 78M and 1117 regulator lines that anchor cost-sensitive power designs. The profiles here cover its linear regulators: the CJ78M05 5 V part in TO-252, the CJT1117B-3.3 fixed 3.3 V LDO in SOT-223, and the CJ78L12 12 V regulator in SOT-89. Changjing ordering strings have evolved across datasheet generations — current codes can carry grade and packing suffixes the older series manuals do not show — so the full string on the offered lot, not the family name alone, is what an RFQ should quote.

Sourcing notes for CJ parts. Always quote the complete manufacturer ordering code — package, temperature grade, speed or accuracy grade, and packing (reel, tube or tray) all change availability and price, and suffixes are where most mismatches happen. Check the lifecycle status on the manufacturer site before committing to a multi-year build; parts flagged not-recommended or obsolete need a last-time-buy plan or a verified alternate lined up early. With every offer, request traceability documents — date code, lot code and original packing — and confirm the inspection steps your supplier applies to high-risk lots.