MJ15003 vs. MJ15003G

What does the "G" stand for??? Looking for MJ15003G and they seem to be out of stock everywhere? Effects of the pandemic? Have they been phased out?

I was able to find the MJ15003 but without the "G". Is that a big deal?
 
They are totally interchangeable, unless your company is legally bound to use only lead free parts. And as a repair shop in the USA you do not have that requirement.

An alternate supplier might label them as MJ15003PBF. Pb being the symbol for lead and F for free., hence lead-free. Each maker chooses his own symbol for lead free.
 
The G is the only version you can get now from ON (the original supplier). If you’re getting non-G, be careful where you get them. Only old Motorola stock (getting rarer by the nanosecond), second sources, and FAKES remain in non-G.