ACS108-6S

2 AC line switch - basic application

7/11

2.1.2

AC line transient voltage ruggedness

The ACS108-6S switch is able to withstand safely the AC line transients either by clamping the

low energy spikes or by breaking over under high energy shocks, even with high turn-on current

rises.

also used to test the ACS switch according to the IEC 61000-4-5 standard conditions. Thanks

to the load limiting the current, the ACS108-6S switch withstands the voltage spikes up to 2 kV

above the peak line voltage. The protection is based on an overvoltage crowbar technology.

its blocking voltage capability after the surge (switch off back at the next zero crossing of the

current).

Such non-repetitive tests can be done 10 times on each AC line voltage polarity.

Figure 14. Effect of the switching off of a high

inductive load - typical clamping

capability of ACS108-6S

Figure 15. Description of the different steps

during switching off of a high

inductive load

Figure 16. Overvoltage ruggedness test circuit

for resistive and inductive loads

with conditions equivalent to

IEC 61000-4-5 standards

Figure 17. Typical current and voltage

waveforms across the ACS108-6S

during IEC 61000-4-5 standard test

1

2

3

4

5

I

H

V

100µs/div

I

(5 mA/div)

OUT

V

(200 V/div)

OUT

I

H

V

CL

V

OUT

I

OUT

1

2

3

4

5

I

H

V

CL

V

OUT

I

OUT

1

2

3

4

5

2.4 kV surge

Surge generator

"1.2/50 waveform"

Rg

220

ACS108-6Sx

Rgene

2

L

5µH

R

150

Model of the load

I

OUT

V

PEAK

V

OUT

200ns/div

(2 A/div)

(200 V/div)