EMI (Electro Magnetic Interference) suppression filter for AC
power lines eliminate noise entering equipment from
commercial power lines or noise generated from electronic
equipment.
Common mode chokes, line bypass capacitors, across the
line capacitors are generally used as AC EMI suppression
filter device. In suppressing common mode noise, common
mode chokes are most important devices. Because the
characteristics of common mode chokes influences
performance of total filter block MURATA provides two types
of common mode chokes. (Standard type, High frequency
type)
Hybrid choke coil is high performance EMI suppression
device which can suppress both common mode noise and
differential mode noise at the same time. It is effective in AC
power supplies with active device for higher harmonic
countermeasure, which tend to emit relatively higher
differential mode noise.
I
Classification of EMI Suppression Filter for AC Power Lines
Product Name
Common Mode Choke Coil
Standard Type
Suppression of general
common mode noise
Suppression of common mode
noise contains high frequency
noise above 10MHz
Suppression of conduction
noise in AC power line with
active device for higher
harmonic countermeasure.
Suppression of AC power line
noise which contains both
common mode noise and
differential mode noise.
PLA10
PLH10
PLY10
High Frequency Type
Hybrid Choke Coil
Hybrid Choke Coil
Appearance
Effective Frequency Range (Hz)
10k
100k
1M
10M
100M
1G
Application
For AC power supply,
AC adaptor.
Set for low profile equipment.
FKOB
PLY17