Design Kit Design Your EMC-Filter
Order Code 744998
Characteristics
- This Design Kit contains 10 test boards and a selection of suitable components for the simple construction of various line filters.
- It offers a fast and cost-effective solution to set up line filters for common and differential mode suppression.
- This are PCBs for test and evaluation purposes. The boards should not be installed in the final application.
- Evaluate the best filter for your application!
Products
|
Order Code
|
Datasheet
|
Simulation
|
Downloads
|
Status
|
Product series
|
IR
(A)
|
L
(mH)
|
RDC max.
(Ω)
|
VR
(V (AC))
|
VT
(V (AC))
|
Samples
|
|---|---|---|---|---|---|---|---|---|---|---|---|
| WE-LF Common Mode Power Line Choke, 0.4 A, 27 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-LF Common Mode Power Line Choke
|
Rated Current
0.4 A
|
Inductance
27 mH
|
DC Resistance
1.2 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 0.5 A, 20 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
0.5 A
|
Inductance
20 mH
|
DC Resistance
0.54 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 1 A, 10 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
1 A
|
Inductance
10 mH
|
DC Resistance
0.36 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-LF Common Mode Power Line Choke, 1 A, 6.8 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-LF Common Mode Power Line Choke
|
Rated Current
1 A
|
Inductance
6.8 mH
|
DC Resistance
0.3 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 1.5 A, 3.3 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
1.5 A
|
Inductance
3.3 mH
|
DC Resistance
0.12 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 1.5 A, 20 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
1.5 A
|
Inductance
20 mH
|
DC Resistance
0.27 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 2 A, 2.2 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
2 A
|
Inductance
2.2 mH
|
DC Resistance
0.07 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 2 A, 10 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
2 A
|
Inductance
10 mH
|
DC Resistance
0.125 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 2 A, 20 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
2 A
|
Inductance
20 mH
|
DC Resistance
0.22 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-LF Common Mode Power Line Choke, 2 A, 2.2 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-LF Common Mode Power Line Choke
|
Rated Current
2 A
|
Inductance
2.2 mH
|
DC Resistance
0.1 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 2.5 A, 5 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
2.5 A
|
Inductance
5 mH
|
DC Resistance
0.095 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 3 A, 1 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
3 A
|
Inductance
1 mH
|
DC Resistance
0.035 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 3 A, 10 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
3 A
|
Inductance
10 mH
|
DC Resistance
0.105 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 4 A, 2.2 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
4 A
|
Inductance
2.2 mH
|
DC Resistance
0.03 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 4 A, 3.3 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
4 A
|
Inductance
3.3 mH
|
DC Resistance
0.035 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-LF Common Mode Power Line Choke, 4 A, 0.7 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-LF Common Mode Power Line Choke
|
Rated Current
4 A
|
Inductance
0.7 mH
|
DC Resistance
0.027 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMBNC Common Mode Power Line Choke Nanocrystalline, 5 A, 9 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMBNC Common Mode Power Line Choke Nanocrystalline
|
Rated Current
5 A
|
Inductance
9 mH
|
DC Resistance
0.032 Ω
|
Rated Voltage
300 V (AC)
|
Insulation Test Voltage
2100 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 6 A, 1 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
6 A
|
Inductance
1 mH
|
DC Resistance
0.013 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 6 A, 2.2 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
6 A
|
Inductance
2.2 mH
|
DC Resistance
0.02 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WE-CMBNC Common Mode Power Line Choke Nanocrystalline, 7 A, 7 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMBNC Common Mode Power Line Choke Nanocrystalline
|
Rated Current
7 A
|
Inductance
7 mH
|
DC Resistance
0.022 Ω
|
Rated Voltage
300 V (AC)
|
Insulation Test Voltage
2100 V (AC)
|
|
|||
| WE-CMB Common Mode Power Line Choke, 7.5 A, 1 mH |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WE-CMB Common Mode Power Line Choke
|
Rated Current
7.5 A
|
Inductance
1 mH
|
DC Resistance
0.01 Ω
|
Rated Voltage
250 V (AC)
|
Insulation Test Voltage
1500 V (AC)
|
|
|||
| WP-SMSH REDCUBE SMT with external thread with Pin, 50 A, – |
Simulation
–
|
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WP-SMSH REDCUBE SMT with external thread with Pin
|
Rated Current
50 A
|
–
|
–
|
–
|
–
|
|
||
| WP-SMSH REDCUBE SMT with external thread with Pin, 50 A, – |
Simulation
–
|
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WP-SMSH REDCUBE SMT with external thread with Pin
|
Rated Current
50 A
|
–
|
–
|
–
|
–
|
|
||
| WCAP-FTX2 Film Capacitors, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-FTX2 Film Capacitors
|
–
|
–
|
–
|
Rated Voltage
275 V (AC)
|
–
|
|
|||
| WCAP-FTX2 Film Capacitors, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-FTX2 Film Capacitors
|
–
|
–
|
–
|
Rated Voltage
275 V (AC)
|
–
|
|
|||
| WCAP-FTX2 Film Capacitors, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-FTX2 Film Capacitors
|
–
|
–
|
–
|
Rated Voltage
275 V (AC)
|
–
|
|
|||
| WA-SNSR Self-Retaining Spacer, –, – |
Simulation
–
|
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WA-SNSR Self-Retaining Spacer
|
–
|
–
|
–
|
–
|
–
|
|
||
| WCAP-CSSA Interference Suppression, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-CSSA Interference Suppression
|
–
|
–
|
–
|
Rated Voltage
250 V (AC)
|
–
|
|
|||
| WCAP-CSSA Interference Suppression, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-CSSA Interference Suppression
|
–
|
–
|
–
|
Rated Voltage
250 V (AC)
|
–
|
|
|||
| WCAP-CSSA Interference Suppression, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-CSSA Interference Suppression
|
–
|
–
|
–
|
Rated Voltage
250 V (AC)
|
–
|
|
|||
| WCAP-CSSA Interference Suppression, –, – |
Status
Active
i
| Production is active. Expected lifetime: >10 years.
|
Product series
WCAP-CSSA Interference Suppression
|
–
|
–
|
–
|
Rated Voltage
250 V (AC)
|
–
|
|
Find filter solutions quickly and cost-effectively with the
Design Your EMC-Filter Design Kit
Find filter solutions quickly and cost-effectively with the
Design Your EMC-Filter Design Kit
This Design Kit offers a fast and cost-effective means of building up the filter design with various components. It allows for the examination of the filter circuit's performance in relation to the desired filtering effect, facilitating the seamless integration of the chosen filter circuit into the application. This can reduce development time and the associated costs.
For even more filter design possibilities, also check out our evaluation boards for specific applications.
Structure and mode of operation
Structure and mode of operation
The Discharge Resistor (R) allows to discharge the X-Capacitor when there is no load connected.
The X-Capacitor (Cx) represents a low impedance for high frequency differential signals.
The Common Code Choke (CMC) provides properties for differential and common noise filtering. At higher frequencies this choke acts as a stronger impedance than the capacitor.
The Y-Capacitors (CY1, CY2) short high frequency, common mode signals to ground.
Low-pass filters for common and differential mode suppression
Common Mode Filter
At common mode noise the inductance of the Common Mode Choke (CMC) is very high. This inductance and the Y-Capacitors (CY1, CY2) build a low-pass for high frequency common mode noise. The Y-Capacitors create a conductor for high frequency noise to internal ground, so common mode noise can be diverted. Because of the high common mode impedance of the Common Mode Choke at high frequencies, the interference current will be attenuated.
Differential Mode Filter
At differential signal noise current flows in through line L and returns through line N. Basically, in this situation the X-Capacitor (Cx) and the Leakage Inductance (LLeak) of the Common Mode Choke build a low pass filter. The loop of this low pass filter is closed via the X-Capacitor. The high frequency interference is filtered. Meanwhile the supply current, which has typically a much lower frequency (50-60 Hz), will pass the filter.
Insertion Loss Examples
Example 1 measured with:
CMC: WE-CMB S / 744 822 110 /
L = 10 mH / IR = 1 A
Cx: 890 324 023 025 /
C = 0.15 µF / UR = 275 VAC
Cy: 885 352 213 015 1/
C = 2200 pF / UR = 250 VAC
Example 2 measured with:
CMC: WE-CMB L / 744 824 220 /
L = 20 mH / IR = 2 A
Cx: 890 324 023 025 /
C = 0.15 µF / UR = 275 VAC
Cy: 885 352 213 015 1/
C = 2200 pF / UR = 250 VAC
Example 3 measured with:
CMC: WE-LF / 744 662 200 2 /
L = 2.2 mH / IR = 2 A
Cx: 890 324 023 025 /
C = 0.15 µF / UR = 275 VAC
Cy: 885 352 213 015 1/
C = 2200 pF / UR = 250 VAC
Example 4 measured with:
CMC: WE-CMBNC M / 744 803 050 9 /
L = 9 mH / IR = 5 A
Cx: 890 324 023 025 /
C = 0.15 µF / UR = 275 VAC
Cy: 885 352 213 015 1/
C = 2200 pF / UR = 250 VAC
Evaluation Boards
Products of interest
Videos
#askLorandt explains: Design your EMC Line Filter Step by Step
Videos
Würth Elektronik Webinar: How do I solve EMI problems on pcb level?
Videos
#askLorandt explains: Design your EMC-Filter