1769205x2, 176881212, 176861512

FISM

– Fixed Isolated SMT Module

we-online.com

Würth Elektronik eiSos GmbH & Co. KG

– Data Sheet Rev. 1.0

©July 2018

30/37

Filter Suggestions for Conducted and Radiated EMI

The input filter shown in the schematic below is recommended to achieve conducted and radiated EMI compliance

according to EN55032 Class B (see results on pages 12 to 16 RADIATED AND CONDUCTED EMISSIONS (WITH EMI

INPUT FILTER)).

C4

C1

+VIN

-VIN

-VOUT

+VOUT

Module

2

1

4

5

L1

Y-Cap

LC Filter

MLCC based filter

Model: 3.3V  5V; 5V  5V; 5V  12V; 5V  15V

Model: 12V  5V

POLYMER CAP based filter

As a replacement for C1 and L1 following parts can be used for all models (176xxxxx2)

Note: C4 has to be rated for an impulse voltage equal or greater than the isolation voltage of the power module itself.

DESIGNATOR

DESCRIPTION

FILTER

ORDER CODE

MANUFACTURER

C1

Ceramic chip capacitor 22µF/10V 1210 X7R

LC

885012209006

Würth Elektronik

L1

Filter inductor, 2.2µH, PD2 family

744773022

Würth Elektronik

C4

Ceramic chip capacitor 470pF/250Vac/2500V

Impulse Voltage 1808 X7R

Y-Cap

885362210009

Würth Elektronik

DESIGNATOR

DESCRIPTION

FILTER

ORDER CODE

MANUFACTURER

C1

Ceramic chip capacitor 10µF/25V 1210 X7R

LC

885012209028

Würth Elektronik

L1

Filter inductor, 10µH, PD2 family

74477310

Würth Elektronik

C4

Ceramic chip capacitor 470pF/250Vac/2500V

Impulse Voltage 1808 X7R

Y-Cap

885362210009

Würth Elektronik

DESIGNATOR

DESCRIPTION

FILTER

ORDER CODE

MANUFACTURER

C1

Aluminum polymer capacitor 150µF/16V

WCAP- PSLP

LC

875105345011

Würth Elektronik

L1

Filter inductor, 3.3µH, PD2 family

744773033

Würth Elektronik

C4

Ceramic chip capacitor 470pF/250Vac/2500V

Impulse Voltage 1808 X7R

Y-Cap

885362210009

Würth Elektronik