WF WE-CLFS Line Filters Passive Components Owner’s Manual

WE-CLFS Line Filters Passive Components

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Specifications:

Operating Voltage: 250 VAC 50/60 Hz 250 VDC

Rated Current: Up to 20 A

Climatic Category: 25/100/21

Certifications: RoHS COMPLIANT, REACh
COMPLIANT, C US

Max. Operating Temperature: 100°C

Product Usage Instructions:

1. Single Phase Line Filter Types:

• Single-Stage: Very compact design

• Single-Stage Advanced: Improved differential
  mode noise attenuation

• Two-Stage: Extreme differential and common
  mode noise attenuation

2. Internal Schematic:

The internal schematic includes components like X-Capacitors,
Y-Capacitors, Common Mode Chokes, and Discharge Resistor for safety
standards compliance.

3. Attenuation Performance:

The product provides differential and common mode noise
attenuation at different inductance values and topologies. Refer to
the provided attenuation comparison graphs for more details.

4. Influence of System Impedances:

The attenuation of the filter is influenced by system
impedances. Different filters exhibit varying responses based on
system impedance levels. Filters with two or more stages offer
decoupled impedance nodes for improved performance.

5. Additional Resources:

For LTspice Simulation Models, Application Scenarios, and more
technical information, visit the official WE-CLFS website: www.we-online.com /we-clfs

FAQ:

Q: What is the maximum rated current for this product?

A: The product is rated for up to 20 A of current.

Q: Are the certifications for this product?

A: The product is RoHS compliant, REACh compliant, and C US
certified.

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MAINS FILTER GUIDE
An integrated solution for your EMI.

1 Single Phase Line Filter
Single-Stage: Very compact design
Single-Stage Advanced: Improved differential mode noise attenuation
Two-Stage: Extreme differential and common mode noise attenuation
Low Leakage Version available for each of them

Size
Single-Stage Single-Stage Advanced Two-Stage

L

W

H

(mm) (mm) (mm)

64 35 29

75 51.8 29

114.9 58.5 45

W H
L

LTspice Simulation Models, Application Scenarios and more technical Information available.
More information about WE-CLFS: www.we-online.com/we-clfs

2 Internal Schematic

L

Common Mode

Noise

PE

Differential Mode

Noise

N

Two-Stage Single-Stage Advanced Single-Stage
L1 R CX1
L2

Line

CYL

L3

CX2

CYN

L4

L’ CX3
N’

Discharge Resistor R: Discharge of capacitors. Important to fulfill safety standards.

X-Capacitor CX: Increases the differential mode attenuation.

Common Mode Choke L: High common and partly differential mode attenuation, without deriving any leakage current to ground.

Y-Capacitor CY: Strongly increases common and partly differential mode attenuation, driving some leakage current to ground.

Line Load
Attenuation

Load Attenuation

4 ATTENUATION FOR DIFFERENT INDUCTANCE VALUES AND TOPOLOGIES:

Common Mode Attenuation
80

70

60

50

40

30

20

10

0 10 kHz

100 kHz

1 MHz Frequency

10 MHz

Attenuation comparison of different filter inductance values for a single- stage filter.

100 MHz

20 mH / 810911001 10 mH / 810911003 2.2 mH / 810911006

Attenuation

Differential Mode Attenuation
80

70

60

50

40

30

20

10

0 10 kHz

100 kHz

1 MHz Frequency

10 MHz

100 MHz

Common Mode Attenuation
120

100

80

60

40

20

0 10 kHz

100 kHz

1 MHz Frequency

10 MHz

Differential Mode Attenuation
120

100

Attenuation

80 Attenuation comparison of

different topologies with a

filter inductance of 2.2 mH

60

100 MHz

Single-Stage / 810911008 Single-Stage Advanced / 810912014 Two-Stage / 810913020

40
20
0 10 kHz

100 kHz

1 MHz Frequency

10 MHz

100 MHz

Attenuation plots for the examined filters with system impedances of 50 and 50 . You can simulate these plots and many more with our REDEXPERT online tool.

Current capability [in %] Attenuation (dB) Attenuation (dB)

3 General Information

Rated current of the mains filter : Must be equal to or greater than the current requirements of the connected devices. For ambient temperatures above 40 °C, the following derating curve applies.

Operating Voltage: 250 VAC 50/60 Hz 250 VDC
Operating Temperature: -25 °C ­ +100 °C

Derating Curve: 120
100

Climatic Category:

25/100/21

80

Rated Current:

60

Up to 20 A

Certifications:

40

Rated Temperature

RoHS
COMPLIANT

REACh
COMPLIANT

10

C

US

20

Max. Operating

0 0

20

40

60

80 100 Temperature

Ambient Temperature [in°C]

5 Influence of the System Impedances

Single-Stage Filter: (810911001)

80 70 60 50 40 30 20 10
0 -10 -20
100 kHz

1 MHz Frequency

10 MHz

DM 0.1 /100

DM 100 /0.1

Two-Stage Filter: (810913006)

100 MHz

80 70 60 50 40 30 20 10
0 -10 -20
100 kHz

1 MHz

10 MHz

Frequency

DM 0.1 /100

DM 100 /0.1

· Single-Stage Filter:
Attenuation of filter is strongly depended on system impedances (especially up to approx. 10 MHz).
· Two-Stage Filter:
Much less system impedance dependence. Filters with two or more stages have a decoupled impedance node.
· Impedances of your system may vary and influen-
ce the attenuation of your filter. Therefore the two shown ,,worst case methods” are defined in CISPR 17 to show system impedance influence:
ZIN = 0.1 , ZOUT = 100 ZIN = 100 , ZOUT = 0.1
100 MHz

Attenuation Attenuation
Current

6 Filter Selection
with REDEXPERT
Selection Guide:
· Choose rated current · Check frequency range of the noise · Check attenuation in this frequency range · Choose maximal allowed
leakage current
Take the different system impedances in consideration.

Common Mode Insertion Loss

Differential Mode Insertion Loss

80 dB 70 dB 60 dB 50 dB 40 dB 30 dB 20 dB 10 dB
0 dB 100 kHz

1 MHz

10 MHz

Frequency

100 MHz

80 dB 70 dB 60 dB 50 dB 40 dB 30 dB 20 dB 10 dB
0 dB 100 kHz

1 MHz

10 MHz

Frequency

100 MHz

Temperature Derating

1.6 A 1.4 A 1.2 A 1.0 A 0.8 A 0.6 A 0.4 A 0.2 A 0.0 A
0 °C

20 °C

40 °C

60 °C

Ambient Temperature

80 °C

100 °C

Single-Stage Filter 20 mH / 810911001

Single-Stage Filter 20 mH / 810911001

Single-Stage Filter 20 mH / 810911001

REDEXPERT is for simulation and selection

www.we-online.com/redexpert-emc-filters

7 Interesting: Leakage Current

Leakage current calculation during regular operation:
L CX

N

CYN

CYL

PE ILK = 2 · f · U · CYL see also IEC 60939-1:2010

Worst case operation: Neutral line interruption

L CX

CYN

CYL

PE

ILK = 2 · f · U · Ceq Ceq= CYL+ CYN · CX
CYN + CX

For low leakage requesting applications, we offer a low leakage version without Y capacitors.

8 Placement and Grounding

Short Connections

Minimize Crosstalk

Good Placement

Fast-on Terminals
Mounting Holes for M4 Screws Chassis
More information about WE-CLFS: www.we-online.com/we-clfs

Good!
Properly placing the filter optimizes its performance and prevents unintentional bypassing of it.
Ensure that the filter housing have a wide connection area to the ground plane: Remove paint and dirt.

DIENECK ARPRINZEN 99999941.0724.FLY

References

• Würth Elektronik

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