For more information, please visit the
product page.
date
01/2017
page
1 of 7
SERIES: VFM-XX
DESCRIPTION: DC EMI FILTER
FEATURES
•compact size
•suitable for use with a
wide range of dc-dc
converters
•reduces common and
differential mode noise
RoHS
MODEL
VFM-10A
VFM-15C
VFM-20A
VFM-25C
1) for 100 ms
2) input to ground, output to ground
input voltage
range
(Vdc)
input surge voltage
1
nominal
(Vdc)
input current
max.
(A)
isolation voltage
2
min.
(Vdc)
0 ~ 75
0 ~ 75
0 ~ 75
0 ~ 36
100
100
100
50
10
15
20
25
1,500
1,500
1,500
1,500
GENERAL
parameter
dimensions
conditions/description
VFM-10A:
VFM-15C:
VFM-20A:
VFM-25C:
case material
isolation voltage
isolation resistance
dc resistance
2.00x1.00x0.46 inch
50.8x25.4x11.7 mm
4.06x3.11x0.89 inch
103.2x79x22.7 mm
2.00x1.60x0.50 inch
50.8x40.6x12.7 mm
4.06x3.11x0.89 inch
103.2x79x22.7 mm
min
nom
max
units
VFM-10A/20A: black plastic
VFM-15C/25C: black coated steel
input to ground, output to ground
input to ground, output to ground
total for two legs
1,500
10
7
16
Vdc
W
mW
ENVIRONMENTAL
parameter
cooling
operating temperature
case temperature
storage temperature
-40
conditions/description
natural convection
-40
100
100
100
°C
°C
°C
min
nom
max
units
20050 SW 112
th
Ave. Tualatin, Oregon 97062
phone 503.612.2300
fax 503.612.2383
www.cui.com
For more information, please visit the
product page.
date
01/2017
page
2 of 7
SERIES: VFM-XX
DESCRIPTION: DC EMI FILTER
DRAWING (VFM-10A)
2.00 [50.8]
0.475 [12.06]
0.15 [3.8]
1.225 [31.12]
0.12 [3.2]
4
NOTE:Pin Size is ø0.04 inch (ø1.02 mm)
All Dimensions in inches (mm)
Tolerances: Inches: X.XX= ±0.02, X.XXX= ±0.010
Millimeters: X.X= ±0.5 , X.XX=±0.25
2
5
0.750 [19.05]
1
BOTTOM VIEW
3
1.00 [25.4]
PIN CONNECTION
Pin
1
2
3
4
5
Function
+V Input
-V Input
+V Output
-V Output
GND
0.040 [1.02]
0.22 [5.6] min.
SIDE VIEW
0.46 [11.7]
DRAWING (VFM-20A)
2.00 [50.8]
0.700 [17.78]
0.15 [3.8]
DIMENSIONS:
NOTE:Pin Size is ø0.04 inch (ø1.02 mm)
All Dimensions in inches (mm)
Tolerances Inches: X.XX= ±0.02 , X.XXX= ±0.010
Millimeters: X.X= ±0.5 , X.XX=±0.25
0.15 [3.8] 1.000 [25.40]
4
0.150 [3.81]
0.200 [5.08]
1.60 [40.6]
2
0.200 [5.08]
1
0.200 [5.08]
0.200 [5.08]
0.200 [5.08]
5
0.200 [5.08]
6
0.25 [6.3]
3
9
8
7
BOTTOM VIEW
PIN CONNECTION
Pin
1,2
3,4
5,6
Function
+V Input
-V Input
+V Output
-V Output
GND
0.040 [1.02]
0.22 [5.6] min.
SIDE VIEW
7,8
9
0.50 [12.7]
20050 SW 112
th
Ave. Tualatin, Oregon 97062
phone 503.612.2300
fax 503.612.2383
www.cui.com
For more information, please visit the
product page.
date
01/2017
page
3 of 7
SERIES: VFM-XX
DESCRIPTION: DC EMI FILTER
DRAWING (VFM-15C/25C)
2.79 [71.0]
4-
R0
.
08
8
[R
2.
25
]
POWER
+Vin -Vin GND
2.92 [74.2]
4-0.47 [12.0]
3.11 [79.0]
CONVERTER
-Vin
+Vin
2.16 [55.0]
3.15 [80.0]
20050 SW 112
th
Ave. Tualatin, Oregon 97062
phone 503.612.2300
1.51 [38.5]
fax 503.612.2383
www.cui.com
0.03 [1.0]
3.70 [94.2]
0.89 [22.7]
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date
01/2017
page
4 of 7
SERIES: VFM-XX
DESCRIPTION: DC EMI FILTER
VFM-10A INTERNAL SCHEMATIC
VFM-20A INTERNAL SCHEMATIC
VFM-15C/25C INTERNAL SCHEMATIC
20050 SW 112
th
Ave. Tualatin, Oregon 97062
phone 503.612.2300
fax 503.612.2383
www.cui.com
For more information, please visit the
product page.
date
01/2017
page
5 of 7
SERIES: VFM-XX
DESCRIPTION:DC EMI FILTER
INSERTION LOSS (VFM-10A)
INSERTION LOSS (VFM-10A)
COMMON MODE
DIFFERENTIAL MODE
dB
dB
KHz
KHz
INSERTION LOSS (VFM-15C)
COMMON MODE
DIFFERENTIAL MODE
dB
KHz
dB
KHz
INSERTION LOSS (VFM-20A)
COMMON MODE
0
-10
-20
-30
0
-10
-20
-30
DIFFERENTIAL MODE
dB
-40
-50
-60
-70
-80
-90
100
1000
10000
100000
dB
Gain
-40
-50
-60
-70
-80
-90
100
1000
10000
100000
Gain
KHz
KHz
20050 SW 112
th
Ave. Tualatin, Oregon 97062
phone 503.612.2300
fax 503.612.2383
www.cui.com
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