38M4020AA1212 is a flexible ferrite sheet designed for electromagnetic noise suppression and signal optimization in wireless applications. The product features a 0.2 mm thick NiZn ferrite plate with a material permeability of 120, bonded with 0.01 mm PET film on one side and 0.02 mm adhesive tape on the opposite side, resulting in a total thickness of 0.23 mm. The sheet is scored in a 2 mm × 2 mm rectangular grid pattern, allowing bending without compromising effectiveness, and measures 120 × 120 mm. This configuration provides high surface resistivity and functions as a suppressor, blocking electromagnetic noise at lower frequencies while absorbing energy at higher frequencies through the resistive component of material permeability. Common applications include RFID/NFC antenna performance enhancement in mobile devices, radiated noise suppression on PCBs and ICs, wireless charging antenna systems, and effective shielding of antennas and RF circuits from reflections and eddy currents induced by metal surfaces.