How to read markings on EMI/RFI filter
This is an LC feedthru filter which means it is bidirectional.

The 222J refers to 2200 pF shunt cap.







simulate this circuit &ndash; Schematic created using CircuitLab

They cannot control the ferrite inductance L and loss values with J accuracy but they can control the buried cap value. 

So one vendor may have a slightly different Series Resonant Frequency than another.

But this TDK part guarantees at least 25 dB attenuation into 50 Ohms from 45 to 105 MHz. Actual could be as much as 30 MHz to 300 MHz for the TDK part.