ACST4

AC line transient voltage ruggedness

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AC line transient voltage ruggedness

The ACST4 switch is able to sustain safely the AC line transient voltages either by clamping

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

current rises.

The test circuit of the Figure 6. is representative of the final ACST application and is also

used to stress the ACST switch according to the IEC 61000-4-5 standard conditions. Thanks

to the load, the ACST switch sustains 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 rate of rise,

is as high as shown on Figure 7. Such non-repetitive test can be done 10 times on each AC

line voltage polarity.

Figure 3.

Overvoltage ruggedness test

circuit for resistive and inductive

loads according to IEC 61000-4-5

standards.

R = 150

Ω, L = 10 µH, V

Figure 4.

Current and voltage of the ACST4

during IEC 61000-4-5 standard test

L

R

SURGE VOLTAGE

AC LINE & GENERATOR

RG = 220

Ω

COM

OUT

G

ACST4

Figure 5.

Maximum power dissipation versus

RMS on-state current.

Figure 6.

RMS on-state current versus case

temperature.

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

I

(A)

T(RMS)

α=180°

P(W)

180°

α

α

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0

25

50

75

100

125

Tc(°C)

α=180°

DPAK

IPAK

TO-220FPAB

I

(A)

T(RMS)