ACS120-7SB/SFP/ST

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Fig. A: Turn-off operation of the ACS120 switch

with an electro-valve: waveform of the pin OUT

Fig. B: ACS120 switch static characteristic.

The ACS120 switch is able to sustain safely the AC line transient voltages either by clamping the low en-

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

The test circuit of the figure C is representative of the final ACS application and is also used to stress the

ACS switch according to the IEC 61000-4-5 standard conditions. Thanks to the load, the ACS switch sus-

tains the voltage spikes up to 2 kV above the peak line voltage. It will break over safely even on resistive

load where the turn on current rise is high as shown on figure D. Such non repetitive test can be done 10

times on each AC line voltage polarity.

AC LINE TRANSIENT VOLTAGE RUGGEDNESS

L

R

SURGE VOLTAGE

AC LINE & GENERATOR

RG = 220

Ω

COM

OUT

G

S

D

ON

ACSxx

Fig. C: Overvoltage ruggedness test circuit

for resistive and inductive loads according to

IEC61000-4-5 standards.

R = 150

Fig. D: Current and Voltage of the ACS120 dur-