ADM2491E

Rev. B | Page 5 of 16

INSULATION AND SAFETY-RELATED SPECIFICATIONS

Table 5.

Parameter

Symbol

Value

Unit

Conditions

Rated Dielectric Insulation Voltage

5000

V rms

1 minute duration

Minimum External Air Gap (Clearance)

L(I01)

7.7

mm min

Measured from input terminals to output

terminals, shortest distance through air

Minimum External Tracking (Creepage)

L(I02)

8.1

mm min

Measured from input terminals to output

terminals, shortest distance along body

Minimum Internal Gap (Internal Clearance)

0.017

mm min

Insulation distance through insulation

Tracking Resistance (Comparative Tracking Index)

CTI

>175

V

DIN IEC 112/VDE 0303 Part 1

Isolation Group

IIIa

Material Group (DIN VDE 0110, 1/89)

VDE 0884 INSULATION CHARACTERISTICS

This isolator is suitable for basic electrical isolation only within the safety limit data. Maintenance of the safety data must be ensured by

means of protective circuits.

An asterisk (*) on a package denotes VDE 0884 approval for 848 V peak working voltage.

Table 6.

Description

Symbol

Characteristic

Unit

Installation Classification per DIN VDE 0110 for Rated Mains Voltage

≤300 V rms

I to IV

≤450 V rms

I to II

≤600 V rms

I to II

Climatic Classification

40/105/21

Pollution Degree (DIN VDE 0110, see Table 1)

2

Maximum Working Insulation Voltage

V

IORM

846

V peak

Input-to-Output Test Voltage, Method b1

V

PR

1590

V peak

V

Input-to-Output Test Voltage, Method a

V

PR

After Environmental Tests, Subgroup 1

1357

V peak

V

After Input and/or Safety Test, Subgroup 2/Subgroup 3

1018

V peak

V

Highest Allowable Overvoltage (Transient Overvoltage, t

V

TR

6000

V peak

Safety-Limiting Values (Maximum Value Allowed in the Event of a Failure, see Figure 20)

Case Temperature

T

S

150

°C

Input Current

I

S, INPUT

265

mA

Output Current

I

S, OUTPUT

335

mA

Insulation Resistance at T

R

S

Ω