The NL453232T-221J-PF is a fixed inductor manufactured by TDK. It is an axial leaded, surface mountable inductor with a ferrite core. The device has an inductance of 221uH with a tolerance of ±10%, and is rated for a maximum operating frequency of 1MHz. This inductor has a maximum DC current of 1.3A, and is rated for a maximum of 100mOhm DC resistance. The NLV32T-221J-EF is a suggested alternate, which, while also manufactured by TDK, has a lower tolerance of ±5%, and is rated for a maximum operating frequency of 1.5MHz. It has a similar maximum current rating, but a slightly higher DC resistance rating of 125mOhm. This part is also an axial-leaded, surface mountable inductor.