SEMICONDUCTOR BC637 MARKING SPECIFICATION TO-92 PACKAGE 1. Marking method Laser Marking 816 1 2 K BC637 2. Marking 3 4 No. 2001. 3. 9 Item Marking Description Device Name BC637 BC637 Lot No. 816 8 Year 0~9 : 1900~1999 16 Week 16 : 16th Week KEC K KEC CORP. hFE Grade - - Revision No : 0 1/1