Nickel zinc ferrite

Type       main field of applicationpreferred core shapesdatasheet
K 14 filter, antennae, EMC application up to approx 300 MHz rods, sleeves, ferrite beads  
K 40 antennae, EMC application up to approx 50 MHz rods, sleeves, ring cores, chokes, ferrite beads  
K 41 antennae, EMC application up to approx 50 MHz rods, sleeves, chokes  
K 80 antennae, filter up to approx 20 MHz rods, double aperture cores  
K 250 antennae, interference suppression rods, sleeves, ring cores, double and multi aperture cores, beads  
K 251 antennae and transponder with flat TC from -40°C to +125°C rods, ring cores, transponder cores  
K 800 filter, EMC application ring cores, double and multi aperture cores, beads  
K 801 filter, EMC application ring cores, double and multi aperture cores, beads