EMI LEADED FILTERS
EMI SUPPRESSION FILTERS
WITH SEMICONDUCTOR SURGE PROTECTION
VFR303 Series
The VFR303 Series is an EMI suppression filter with a built-in
varistor function designed to protect semiconductors, such as
C-MOS and TTl, from ESD surge rushes. The VFR303 series
works well as EMI suppression filter.
FEATURES
s Absorbs ESD surges, provides IC protection.
s Excellent signal line EMI suppression filter.
s Thin and low height enables high density mounting.
APPLICATIONS
Elimination of noise and protection of semiconductors in office
automation equipment, including computers and their peripheral
equipment, copy machines, and communication terminals.
PART NUMBERING SYSTEM
VFR303
—
351
SERIES
PACKAGING
Bulk = 351
Taped = 431
AY
25
TYPE
RATED VOLTAGE
DIMENSIONS: mm
VFR303-351
TYPICAL INSERTION LOSS
CHARACTERISTICS (50 Ohms – 3K Ohms)
8.0 max.
2.3 max.
Terminal
F1
25.0 max.
5.0 ± 0.5
F1: 2.5 ± 0.5
5.0 max.
3 x 0.8 Dia.
0.45 ± 0.1 Dia.
2.5 ± 0.2
Standard
Mounting Hole
0
10
20
30
40
50
60
70
5
10
100
Frequency (MHz)
1000
SPECIFICATIONS
Part Number
Capacitance (1kHz)
(Between
Terminals 1-2)
DC Resistance
(Ohms)
(Between
Terminals 1-3)
Rated Voltage
(Between
Terminals 1-2)
Rated Current
(Between
Terminals 1-3)
Varistor
Voltage
Peak Pulse
Current (Between
Terminals 1-2)
8/20s
Operating
Temp. Range
VFR303-351 AY 25 130pF ± 20%
150 ± 35%
25VDC
Available as standard through authorized Murata Electronics Distributors.
20mA
50VDC ± 20%
(V1mA)
15A
–25 to +85°C
CG01-I
255