ISO7740 datasheet(8/55 Pages) TI2

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5.6 Insulation Specifications

PARAMETER

TEST CONDITIONS

VALUE

UNIT

DWW-16

DW-16

DBQ-16

CLR

External clearance(1)

Shortest terminal-to-terminal distance through air

>14.5

>3.7

CPG

External creepage(1)

Shortest terminal-to-terminal distance across the

package surface

>14.5

>3.7

DTI

Distance through the

insulation

Minimum internal gap (internal clearance)

>21

>17

μm

CTI

Comparative tracking index

DIN EN 60112 (VDE 0303-11); IEC 60112

>600

Material group

According to IEC 60664-1

Overvoltage category per IEC

60664-1

Rated mains voltage ≤ 300 VRMS

I-IV

I-III

Rated mains voltage ≤ 600 VRMS

I-IV

n/a

Rated mains voltage ≤ 1000 VRMS

I-IV

I-III

n/a

DIN EN IEC 60747-17 (VDE 0884-17) (2)

VIORM

Maximum repetitive peak

isolation voltage

AC voltage (bipolar)

2828

2121

566

VPK

VIOWM

Maximum working isolation

voltage

AC voltage; Time dependent dielectric breakdown

(TDDB) Test; See Section 8.2.3.1

2000

1500

400

VRMS

DC voltage

2828

2121

566

VDC

VIOTM

Maximum transient isolation

voltage

VTEST = VIOTM,

t = 60 s (qualification);

VTEST = 1.2 x VIOTM,

t= 1 s (100% production)

8000

4242

VPK

VIMP

Maximum impulse voltage(3)

Tested in air, 1.2/50-μs waveform per IEC 62368-1

9600

8000

4000

VPK

VIOSM

Maximum surge isolation

voltage(4)

VIOSM ≥ 1.3 x VIMP; Tested in oil (qualification test),

1.2/50-μs waveform per IEC 62368-1

12800

10000

VPK

qpd

Apparent charge(5)

Method a, After Input-output safety test subgroup 2/3,

Vini = VIOTM, tini = 60 s;

Vpd(m) = 1.2 x VIORM, tm = 10 s

≤5

Method a, After environmental tests subgroup 1,

Vini = VIOTM, tini = 60 s;

Vpd(m) = 1.6 x VIORM, tm = 10 s

≤5

Method b: At routine test (100% production) and

preconditioning (type test);

Vini = 1.2 x VIOTM, tini = 1 s;

Vpd(m) = 1.875 x VIORM, tm = 1 s (method b1) or

Vpd(m) = Vini, tm = tini (method b2)

≤5

CIO

Barrier capacitance, input to

output(6)

VIO = 0.4 x sin (2πft), f = 1 MHz

≅1

RIO

Isolation resistance(6)

VIO = 500 V, TA = 25°C

>1012

VIO = 500 V, 100°C ≤ TA ≤ 125°C

>1011

VIO = 500 V at TS = 150°C

>109

Pollution degree

Climatic category

55/125/21 55/125/21 55/125/21

UL 1577

VISO

Maximum withstanding

isolation voltage

VTEST = VISO , t = 60 s (qualification),

VTEST = 1.2 x VISO , t = 1 s (100% production)

5700

5000

3000

VRMS

(1)

Creepage and clearance requirements should be applied according to the specific equipment isolation standards of an application.

Care should be taken to maintain the creepage and clearance distance of a board design to ensure that the mounting pads of

the isolator on the printed-circuit board do not reduce this distance. Creepage and clearance on a printed-circuit board become

equal in certain cases. Techniques such as inserting grooves and/or ribs on a printed-circuit board are used to help increase these

specifications.

(2)

This coupler is suitable for safe electrical insulation only within the safety ratings. Compliance with the safety ratings shall be ensured

by means of suitable protective circuits.

ISO7740-Q1, ISO7741-Q1, ISO7742-Q1

SLLSEU0G – NOVEMBER 2016 – REVISED OCTOBER 2024

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