SEMICONDUCTOR KTC4527F MARKING SPECIFICATION TO-220IS PACKAGE 1. Marking method Laser Marking or Ink Marking. 2. Marking 1 K 2 C4527F R 3 No. 2002. 8. 27 216 4 Item Marking Description KEC K KEC CORP. Device Name C4527F KTC4527F hFE Grade R R, O Lot No. 216 Revision No : 0 2 Year 0~9 : 2000~2009 16 Week 16 : 16th Week 1/1