Mag-Mate terminal for 15-16 AWG magnet wire
The 1217355-1 is a Size 4, Style 500 member of TE's Mag-Mate series — a poke-in terminal that terminates 15-16 AWG magnetic wire via IDC, eliminating the need for stripping or soldering.
Size 4 vs Size 2 — wire gauge fit
Within the Mag-Mate family, the 1217355-1 (Size 4) accepts 15-16 AWG wire, while the 1394476-1 (Size 2) takes 18-20 AWG — both use the same poke-in IDC termination method, so the selection is driven by the wire diameter on the BOM.