5

Insulation and Safety Related Specifications

Parameter

Symbol

ACPL-M21L

ACPL-024L

ACPL-021L

Units

Conditions

Minimum External Air Gap

(Clearance)

L(101)

5

4.9

mm

Measured from input terminals to output

terminals, shortest distance through air.

Minimum External

Tracking (Creepage)

L(102)

5

4.8

mm

Measured from input terminals to output

terminals, shortest distance path along body.

Minimum Internal Plastic Gap

(Internal Clearance)

0.08

0.08

mm

Through insulation distance conductor to

conductor, usually the straight line distance

thickness between the emitter and detector.

Tracking Resistance

(Comparative Tracking Index)

CTI

175

175

Volts

DIN IEC 112/VDE 0303 Part 1

Isolation Group

IIIa

IIIa

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

IEC/EN 60747-5-5 Insulation Characteristics* (Option 060)

Description

Symbol

Characteristic

Unit

ACPL-M21L/

024L/021L

Installation classification per DIN VDE 0110/39, Table 1

I – IV

I – III

I – II

Climatic Classification

55/105/21

Pollution Degree (DIN VDE 0110/39)

2

Maximum Working Insulation Voltage

567

Input to Output Test Voltage, Method b*

1063

Input to Output Test Voltage, Method a*

896

Highest Allowable Overvoltage

6000

Safety-limiting values – maximum values allowed in

the event of a failure.

Case Temperature

150

°C

Input Current**

150

mA

Output Power**

600

mW



*

Refer to the optocoupler section of the Isolation and Control Components Designer’s Catalog, under Product Safety Regulations section,

(IEC/EN 60747-5-5) for a detailed description of Method a and Method b partial discharge test profiles.