Broadcom

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ACPL-P314 and ACPL-W314

Data Sheet

Insulation and Safety-Related Specifications

NOTE

All Broadcom data sheets report the creepage and clearance inherent to the optocoupler component itself. These

dimensions are needed as a starting point for the equipment designer when determining the circuit insulation

requirements. However, once mounted on a printed circuit board, minimum creepage and clearance requirements

must be met as specified for individual equipment standards. For creepage, the shortest distance path along the

surface of a printed circuit board between the solder fillets of the input and output leads must be considered (the

recommended land pattern does not necessarily meet the minimum creepage of the device). There are

recommended techniques such as grooves and ribs that may be used on a printed circuit board to achieve desired

creepage and clearances. Creepage and clearance distances will also change depending on factors, such as

pollution degree and insulation level.

Parameter

Symbol

ACPL-

Unit

Conditions

P314

W314

Minimum External Air Gap (External Clearance)

L(101)

7.0

8.0

mm

Measured from input terminals to output

terminals, shortest distance through air.

Minimum External Tracking (External

Creepage)

L(102)

8.0

8.0

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.

Minimum Internal Tracking (Internal Creepage)

N/A

N/A

mm

Measured from input terminals to output

terminals, along internal cavity.

Tracking Resistance (Comparative Tracking

Index)

CTI

>175

>175

V

DIN IEC 112/VDE 0303 Part 1.

Isolation Group

IIIa

IIIa

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