6.6 Insulation Specifications

PARAMETER

TEST CONDITIONS

VALUE

UNIT

GENERAL

CLR

External clearance(1)

Shortest terminal-to-terminal distance through air

>4

mm

CPG

External creepage(1)

Shortest terminal-to-terminal distance across the

package surface

>4

mm

DTI

Distance through the insulation

Minimum internal gap (internal clearance)

0.014

mm

CTI

Comparative tracking index

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

>400

V

Material group

II

Overvoltage category

Rated mains voltage ≤ 150 VRMS

I–IV

Rated mains voltage ≤ 300 VRMS

I–III

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

VIORM

Maximum repetitive peak isolation voltage AC voltage (bipolar)

566

VPK

VIOTM

Maximum transient isolation voltage

VTEST = VIOTM

t = 60 s (qualification)

t = 1 s (100% production)

4242

VPK

qpd

Apparent charge(3)

Method a: After I/O safety test subgroup 2/3, Vini =

VIOTM, tini = 60 s; Vpd(m) = 1.2 × VIORM = 680 VPK, tm

= 10 s

<5

pC

Method a: After environmental tests subgroup 1,

Vini = VIOTM, tini = 60 s; Vpd(m) = 1.6 × VIORM = 906

VPK, tm = 10 s

<5

Method b1: At routine test (100% production) and

preconditioning (type test) Vini = VIOTM, tini = 1 s;

Vpd(m) = 1.875 × VIORM = 1062 VPK, tm = 1 s

<5

CIO

Barrier capacitance, input to output(4)

VIO = 0.4 sin (2πft), f = 1 MHz

~1

pF

RIO

Isolation resistance, input to output(4)

VIO = 500 V, TA = 25°C

>1012

Ω

VIO = 500 V, 100°C ≤ TA ≤ 125°C

>1011

VIO = 500 V at TS = 150°C

>109

Pollution degree

2

Climatic category

40/125/21

UL 1577

VISO

Withstand isolation voltage

VTEST = VISO = 2500 VRMS, t = 60 s (qualification);

VTEST = 1.2 × VISO = 3000 VRMS, t = 1 s (100%

production)

2500

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 basic electrical insulation only within the maximum operating ratings. Compliance with the safety ratings

shall be ensured by means of suitable protective circuits.

(3)

Apparent charge is electrical discharge caused by a partial discharge (pd).

(4)

All pins on each side of the barrier tied together creating a two-terminal device

ISO1540, ISO1541

SLLSEB6F – JULY 2012 – REVISED DECEMBER 2022

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