For more information, please visit the product page.
date 01/2017
page 1 of 7
SERIES:
VFM-XX
EMI FILTER
DESCRIPTION:DC
FEATURES
•compact size
•suitable for use with a
wide range of dc-dc
converters
•reduces common and
differential mode noise
RoHS
MODEL
input voltage
input surge voltage1
input current
isolation voltage2
range
(Vdc)
nominal
(Vdc)
max.
(A)
min.
(Vdc)
VFM-10A
0 ~ 75
100
10
1,500
VFM-15C
0 ~ 75
100
15
1,500
VFM-20A
0 ~ 75
100
20
1,500
VFM-25C
0 ~ 36
50
25
1,500
1) for 100 ms
2) input to ground, output to ground
GENERAL
parameter
conditions/description
dimensions
VFM-10A:
VFM-15C:
VFM-20A:
VFM-25C:
min
nom
max
units
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
case material
VFM-10A/20A: black plastic
VFM-15C/25C: black coated steel
isolation voltage
input to ground, output to ground
1,500
isolation resistance
input to ground, output to ground
10
dc resistance
total for two legs
Vdc
W
7
16
mW
ENVIRONMENTAL
parameter
conditions/description
cooling
natural convection
min
operating temperature
nom
-40
case temperature
storage temperature
20050 SW 112th Ave. Tualatin, Oregon 97062
-40
phone 503.612.2300
fax 503.612.2383
max
units
100
°C
100
°C
100
°C
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For more information, please visit the product page.
date 01/2017
page 2 of 7
EMI FILTER
DESCRIPTION:DC
SERIES:
VFM-XX
DRAWING (VFM-10A)
2.00 [50.8]
0.475 [12.06]
0.15 [3.8]
1.225 [31.12]
2
5
0.12 [3.2]
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
4
0.750 [19.05]
1
BOTTOM VIEW
1.00 [25.4]
3
PIN CONNECTION
Pin
Function
1
+V Input
2
-V Input
0.22 [5.6] min.
3
+V Output
4
-V Output
0.46 [11.7]
5
GND
0.040 [1.02]
SIDE VIEW
DRAWING (VFM-20A)
2.00 [50.8]
0.700 [17.78]
0.15 [3.8]
0.15 [3.8] 1.000 [25.40]
5
BOTTOM VIEW
0.25 [6.3]
6
1
0.200 [5.08]
0.200 [5.08]
7
0.200 [5.08]
9
2
8
0.200 [5.08]
3
0.200 [5.08]
0.150 [3.81]
0.200 [5.08]
1.60 [40.6]
4
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
0.040 [1.02]
0.22 [5.6] min.
SIDE VIEW
20050 SW 112th Ave. Tualatin, Oregon 97062
PIN CONNECTION
Pin
Function
1,2
+V Input
3,4
-V Input
5,6
+V Output
7,8
-V Output
9
GND
0.50 [12.7]
phone 503.612.2300
fax 503.612.2383
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For more information, please visit the product page.
date 01/2017
page 3 of 7
EMI FILTER
DESCRIPTION:DC
SERIES:
VFM-XX
88
[R
2.
25
]
2.92 [74.2]
2.16 [55.0]
1.51 [38.5]
3.70 [94.2]
CONVERTER
-Vin
+Vin
0.89 [22.7]
POWER
+Vin -Vin GND
0.03 [1.0]
.0
3.11 [79.0]
R0
2.79 [71.0]
4-
4-0.47 [12.0]
DRAWING (VFM-15C/25C)
3.15 [80.0]
20050 SW 112th Ave. Tualatin, Oregon 97062
phone 503.612.2300
fax 503.612.2383
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For more information, please visit the product page.
date 01/2017
page 4 of 7
SERIES:
VFM-XX
EMI FILTER
DESCRIPTION:DC
VFM-10A INTERNAL SCHEMATIC
VFM-20A INTERNAL SCHEMATIC
VFM-15C/25C INTERNAL SCHEMATIC
20050 SW 112th 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
EMI FILTER
DESCRIPTION:DC INSERTION
INSERTIONLOSS
LOSS
(VFM-10A)
(VFM-10A)
COMMON MODE
DIFFERENTIAL MODE
˃
˃
ˀ˄˃
ˀ˄˃
ˀ˅˃
ˀ˅˃
ˀˆ˃
˚˴˼́
ˀˇ˃
dB
dB
ˀˆ˃
˚˴˼́
ˀˇ˃
ˀˈ˃
ˀˈ˃
ˀˉ˃
ˀˉ˃
ˀˊ˃
ˀˊ˃
ˀˋ˃
ˀˋ˃
ˀˌ˃
ˀˌ˃
˄˃˃
KHz
˄˃˃˃
˄˃˃˃˃
˄˃˃
˄˃˃˃˃˃
˄˃˃˃
KHz
˄˃˃˃˃
˄˃˃˃˃˃
INSERTION LOSS (VFM-15C)
COMMON MODE
DIFFERENTIAL MODE
˃
˃
ˀ˄˃
ˀ˅˃
ˀ˄˃
ˀˆ˃
ˀ˅˃
dB
dB
ˀˇ˃
˚˴˼́
˚˴˼́
ˀˈ˃
ˀˉ˃
ˀˊ˃
ˀˋ˃
ˀˆ˃
ˀˌ˃
ˀ˄˃˃
ˀˇ˃
ˀ˄˄˃
˄˃˃
˄˃˃˃
KHz
˄˃˃˃˃
˄˃˃˃˃˃
˄˃˃
˄˃˃˃
KHz
˄˃˃˃˃
˄˃˃˃˃˃
INSERTION LOSS (VFM-20A)
COMMON MODE
DIFFERENTIAL MODE
0
0
-10
-10
-20
-20
-30
Gain
-40
dB
dB
-30
-50
-60
-60
-70
-70
-80
-80
-90
-90
100
Gain
-40
-50
1000
KHz
10000
100000
20050 SW 112th Ave. Tualatin, Oregon 97062
100
phone 503.612.2300
1000
KHz
10000
fax 503.612.2383
100000
www.cui.com
For more information, please visit the product page.
date 01/2017
page 6 of 7
EMI FILTER
DESCRIPTION:DC
SERIES:
VFM-XX
INSERTION LOSS (VFM-25C)
COMMON MODE
DIFFERENTIAL MODE
0
0
-10
-5
-20
-30
-40
-15
Gain
dB
dB
-10
-20
Gain
-50
-60
-70
-25
-80
-90
-30
-100
-35
-110
100
1000
KHz
10000
100000
100
1000
KHz
10000
100000
APPLICATION NOTES
The following application note shows EN55022 class B conducted emissions tests for the VFM-XX series EMI
filters in series with a VHK or VHB series DC/DC converter and a purely resistive load. This information is for
example only. Actual results may vary.
1) EMI Filtering - Connection Diagram
Filter Model
(VFM-XX)
VFM-10A
VFM-15C
DC-DC Converter
Model (VHXXXW)
C1
C2
CY1
CY2
CY3
CY4
VHB50W-Q24-S5
47 µF/100 V KY
•••
•••
•••
•••
•••
VHB50W-Q48-S5
47 µF/100 V KY
•••
•••
•••
•••
•••
VHK200W
•••
•••
•••
•••
•••
•••
VHB150W-Q24-S5
47 µF/100 V KY
220 µF/100 V KY
1000 pF / 2 KV
•••
1000 pF / 2
KV
560 pF/2 KV
VHB150W-Q48-S5
•••
220 µF/100 V KY
1000 pF / 2 KV
•••
1000 pF / 2
KV
560 pF/2 KV
VHK200W
•••
•••
•••
•••
•••
•••
VFM-20A
VFM-25C
DC-DC
POWER
SUPPLY
SPECTRUM
ANALYZER
LISN
C1
VFM-XX
GND
C2
VHBXXW
CY4
CY3
CY1
CY2
LOAD
20050 SW 112th 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 7 of 7
SERIES:
VFM-XX
EMI FILTER
DESCRIPTION:DC
2) Conducted Emission Measurement
Filter Model: VFM-10AFilter Model: VFM-15C
DC-DC Converter Model: VHB50W-Q24-S5
DC-DC Converter Model: VHK200W-Q48-S12
Input Voltage: 12 Vdc Input Voltage: 48 Vdc
Filter Model: VFM-20AFilter Model: VFM-25C
DC-DC Converter Model: VHB150W-Q24-S5
Input Voltage: 12 Vdc
20050 SW 112th Ave. Tualatin, Oregon 97062
DC-DC Converter Model: VHK200W-Q24-S12
Input Voltage: 24 Vdc
phone 503.612.2300
fax 503.612.2383
www.cui.com