ACST8-8C

5/8

The ACST8-8C switch is able to safely withstand the AC line transient voltages either by clamping the low

energy spikes or by breaking over under high energy shocks.

The test circuit in Figure A is representative of the ACST application and is used to test the ACST switch

according to the IEC61000-4-5 standard conditions. Thanks to the load impedance, the ACST switch with-

stands voltage spikes up to 2 kV above the peak line voltage by breaking over safely. Such non repetitive

testing can be done 10 times on each AC line voltage polarity.

AC LINE TRANSIENT VOLTAGE RUGGEDNESS

L

R

SURGE VOLTAGE

AC LINE & GENERATOR

G

COM

OUT

Fig. A: Overvoltage ruggedness test circuit for resistive and inductive loads

according to IEC61000-4-5 standardR=47

0

1

2

3

4

5

6

7

8

9

10

11

01234

5678

IT(RMS)(A)

α=180°

P(W)

180°

α

α

Fig. 1: Maximum power dissipation versus RMS

on-state current.

0

1

2

3

4

5

6

7

8

9

0

25

50

75

100

125

Tc(°C)

α=180°

IT(RMS)(A)

Fig. 2-1: RMS on-state current versus case

temperature.