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EMI Filter Array
KNA21 Series
Features
? Distributed constant type LC filter.
Prevents ringing caused by circuit
impedance.
? Stable noise attenuation over wide
frequency range.
? Small and low profile.
How to Order
KNA 21 400 C18 MA 3T S
① ② ③ ④ ⑤ ⑥ ⑦
① Series
② Size Code
? KNA21xxxUA Series realize sharp
21
2012 (EIA: 0805)
attenuation characteristics over the
frequency range from 470MHz for terrestrial
digital TV to 2GHz for mobile phones.
③ Cut off Frequency
150 150MHz
200 200MHz
250
300
250MHz
300MHz
RoHS Compliant
Applications
? Data Lines for Mobile Phones (LCD
220 220MHz
④ Capacitance
400
400MHz
Lines, Video Lines, Bus Lines)
? Bus Lines for Digital Equipment
? Terrestrial Digital TV Broadcasting
C15
C18
C25
15pF
18pF
25pF
C35
C45
35pF
45pF
Specifications
⑤ Application
Part Number
Cut off Capacitance
Frequency ( + 25/ ? 20%)
Attenuation
(Typical)
Rated Rated Operating
Current Voltage Temperature
MA
UA
For Mobile phone
Wide band (1 seg., DVB-H)
KNA21300C15MA3TS 300MHz
KNA21400C18MA3TS 400MHz
15pF
18pF
800 to 2000MHz (@20dB) 35mA 25VDC
800 to 1000MHz (@20dB) 50mA 25VDC
? 25 to + 85 ° C
⑥ Packaging
3T
T&R: 3000 pcs. (KNA21: Std.)
⑦ Termination
KNA21150C45UA3TS 150MHz
KNA21200C35UA3TS 200MHz
KNA21220C25UA3TS 220MHz
KNA21250C18UA3TS 250MHz
45pF
35pF
25pF
18pF
470 to 1000MHz (@35dB)
1000 to 2500MHz (@25dB)
470 to 1000MHz (@30dB)
1000 to 2500MHz (@20dB)
470 to 1000MHz (@25dB)
1000 to 2500MHz (@20dB)
470 to 1000MHz (@25dB)
1000 to 2500MHz (@20dB)
25mA 25VDC
25mA 25VDC
25mA 25VDC
25mA 25VDC
? 25 to + 85 ° C
S
Std.
? Storage
condition
Temperature: ? 10 to + 45 ° C
Humidity: 45 to 75%RH
Dimensions
(Unit: mm)
Attenuation Characteristics
KNA21xxxMA Series
Input Direction Mark
L
IN
KNA21xxxUA Series
Top/Bottom Mark
L
IN/OUT
KNA21xxxMA Series
10
0
? 10
KNA21xxxUA Series
10
0
? 10
KNA21220C25UA
KNA21250C18UA
OUT
IN/OUT
? 20
? 30
KNA21300C15MA
? 20
? 30
KNA21200C35UA
KNA21400C18MA
P
CODE
S
L
G
W T
? 40
? 50
? 40
? 50
KNA21150C45UA
Dimensions
2.0 ± 0.2
1.25 ± 0.2 0.7 ± 0.15
? 60
10
100
1000
10000
? 60
10
100
1000
10000
CODE
Dimensions
P
0.50
S G
0.25 ± 0.1 0.40 ± 0.15
Frequency (MHz)
Frequency (MHz)
Recommended Land Pattern
(Unit: mm)
Packaging Specification
? Taping
CODE A B C D E F G H I J
Dimensions 2.00 0.95 0.75 1.75 0.25 0.25 0.50 1.35 2.45 0.20
KNA21 : 3,000/ reel: STD.
(Unit: mm)
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