Rev. C 11/18

2

CAP200DG

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Figure 3. Pin Configuration.

Pin Functional Description

The pin configuration of Figure 3 ensures that the width of the SO-8

package is used to provide creepage and clearance distance of over

4 mm.

Although electrical connections are only made to pins 2, 3, 6 and 7, it

is recommended that pins 1-4 and pins 5-8 are coupled together on

the PCB – see Applications Section.

PI-5608-020515

D Package (SO-8)

NC

D1

D1

NC

1

2

3

4

8

7

6

5

NC

D2

D2

NC

Figure 4. Placement Options of MOV and C

EXT.

Key Application Considerations

Breakdown Voltage Selection

The system configuration variables include the placement of the

system MOV and X capacitor(s) as well as the differential surge

voltage specifications of the application.

As shown in Table 1, the CAP200DG has a breakdown voltage of

1000 V. For applications where the system MOV is placed in position

1 (MOV

POS1 in Figure 4), the CAP200DG will provide adequate voltage

withstand for surge requirements of 3 kV or higher.

For MOV placement that is not directly across the X Capacitor1 (for

example MOV

POS2 in Figure 4) the 1000 V CAP200DG devices can be

used up to a surge specification of 1.5 kV. For differential surge

voltage specifications of >1.5 kV it is recommended that the MOV

is always placed in the location shown in Figure 4 as MOV

POS1.

It is always recommended that the peak voltage between terminals

D1 and D2 of CAP200DG is measured during surge tests in the final

system. Measurements of peak voltage across CAP200DG during

surge tests should be made with oscilloscope probes having appropri-

ate voltage rating and using an isolated supply to the oscilloscope to

avoid ground currents influencing measurement results. When

making such measurements, it is recommended that 50 V engineer-

ing margin is allowed below the breakdown voltage specification

(for example 950 V with the 1000 V CAP200DG).

PI-7508-012015

X Capacitor1

CEXT

AC

X Capacitor2

MOVPOS1

MOVPOS2

Other EMI

Filter

Components

D1

R1

R2

CAP200DG

D2