There are some minor differences between the obsolete “F” and active “NF” version of below LEDs. Products discontinued EOL (F Suffix) are replaced with brighter and more efficient version (NF Suffix):
Click Here for Comparison 5973301202F | 5973301202NF
Click Here for Manufacturer Document
Summary
5973301202NF
350-5973301202NF
LED GREEN CLEAR 2PLCC SMD
5973301202F
350-2884
597-3301-202F
597-3301-202F-ND