Features
Applications
• Distributed constant type LC filter.
Prevents ringing caused by circuit
impedance.
Suitable for high speed digital circuits and
video signal lines.
• Stable noise attenuation over wide
frequency ranges.
• Low profile (T=0.95mm max.) suitable for
miniature electronic equipments.
• First class auto-placement
• PCs, Laser Printers, Cellular Phone, Clock
Data Lines for LCD Display
• High Speed Video Signal Circuits and
Interface Circuits
• High Speed Digital Circuits
• Anti-Noise Solution
Achieves Effective Noise Suppression in
Noisy High Speed Circuits without Signal
Waveform Distortion
Dimensions Specifications(Unit : mm)
Frequency Characteristics
Equivalent Circuit
KNF21 Series
KNF21
L 2.00.2
W 1.250.2
T 0.80.15
G 0.40.3
KNF21025
KNF21050
KNF21100
KNF21200
KNF21400
Cut off
Freq.
(MHz)
Capacitance
(+50/-20%)
(pF)
20dB Attenuation
(Typical)
Rated
current(mA)
Rated
voltage(VDC)
25MHz 235pF 200– 600MHz
50MHz 130pF 350– 850MHz
100MHz 65pF 450– 950MHz 150mA 25VDC
200MHz 33pF 700–1200MHz
400MHz 17pF 900–1400MHz
IN OUT
GND
Frequency(MHz)
How to Order
KNF 21 050 - W 3
①Series
②Size EIA (EIAJ)
21 :0805 (2012)
③Frequency
④Taping Direction (See Fig 1)
W: Standard
⑤Quantity per Reel
① ② ③ ④ ⑤
025 25MHz 200 200MHz
050 50MHz 400 400MHz
100 100MHz
3 3000pcs.
Part Number
Cut off Frequency at Attenuation typical 3dB, max. 6dB
Operating Temperature: -25 to 85(°C)
-50
-40
-30
-20
-10
0
10
1 10 100 1000 10000
KNF21400
KNF21200
KNF21100
KNF21050
KNF21025
RoHS Compliant
Input Direction Mark
L
W
T
G
IN OUT
