B32922 datasheet(15/22 Pages) EPCOS

15 / 22 page

Application note for the different possible X1 / X2 positions

In series with the powerline

(i.e. capacitive power supply)

Typical Applications:

Power meters

ECUs for white goods and household

appliances

Different sensor applications

Severe ambient conditions

In parallel with the powerline

Typical Applications:

Standard X2 are used parallel over the mains for

reducing electromagnetic interferences coming

from the grid. For such purposes they must meet

the applicable EMC directives and standards.

Basic circuit

Required features

High capacitance stability over the lifetime

Narrow tolerances for a controlled current

supply

Required features

Standard safety approvals

(ENEC, UL, CSA, CQC)

High pulse load capability

Withstand surge voltages

Recommended EPCOS product series

B3293* (305 V AC) heavy duty with

EN approval for X2 (UL Q1/2010)

B3265* MKP series

standard MKP capacitor without safety

approvals

B3267*L MKP series

standard MKP capacitor without safety

approvals

Recommended EPCOS product series

B3292*C/D (305 V AC)

standard series, approved as X2

B3291* (330 V AC), approved as X1

B32921C/D ... B32928C/D

X2 / 305 V AC

Page 15 of 22

Please read Cautions and warnings and

Important notes at the end of this document.

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