3

Isolation characteristics

Table 6. Isolation specifications

Parameter

Symbol

Conditions

Value

Unit

SO8-W

SO8-N

Clearance(Minimum external air

gap )

CLR

Measured from input terminals to output

terminals, shortest distance through air

8

4

mm

Creepage(Minimum external

tracking)

CPG

Measured from input terminals to output

terminals, shortest distance path along body

8

4

mm

Comparative Tracking Index

(Tracking resistance)

CTI

DIN IEC 112/VDE 0303 Part 1

≥ 400

≥ 400

V

Isolation Group

Material Group

(DIN VDE 0110, 1/89, Table 1)

II

II

Table 7. Isolation characteristics

Parameter

Symbol

Test Conditions

Characteristic

Unit

SO8-W

SO8-N

Maximum repetitive isolation voltage

VIORM

AC voltage (bipolar)

1200

1200

VPEAK

Maximum working isolation voltage

VIOWM

AC voltage (sine wave); time-

dependent dielectric breakdown

(TDDB) test

849

849

VRMS

Input to output test voltage (1)

VPR

Method a, type test

VPR = VIORM × 1.6, tm= 10 s

Partial discharge < 5 pC

1920

1920

VPEAK

Method b, 100 % production

test

VPR = VIORM × 1.875, tm = 1 s

Partial discharge < 5 pC

2250

2250

VPEAK

Isolation withstand voltage(2)

VISO

1min (type test)

3536 / 5000

2828 /

4000

VRMS

VPEAK

Isolation test voltage(2)

VISOtest

1sec (100% production)

6000

4800

VPEAK

Transient overvoltage

(Highest allowable overvoltage)

VIOTM

tini= 60 s

Type test

6000

4800

VPEAK

Maximum surge isolation Voltage

VIOSM

Type test

6000

4800

VPEAK

Isolation resistance

RIO

VIO = 500 V at TS

Type test

>109

>109

Ω

1. Test performed in accordance with VDE 0884-10.

2. Test performed in accordance with UL 1577.

Note:

For three-phase systems the values in the table refer to the line-to-neutral voltage.

STISO621

Isolation characteristics

DS13394 - Rev 3

page 6/21