HCPL-0708-560E Datasheet, PDF (5/12 Pages) AVAGO TECHNOLOGIES LIMITED – High Speed CMOS Optocoupler

Insulation and Safety Related Specifications
Parameter
Symbol Value Units
Minimum External Air
L(I01)
4.9
mm
Gap (Clearance)
Minimum External
L(I02)
4.8
mm
Tracking (Creepage)
Minimum Internal Plastic
0.08
mm
Gap (Internal Clearance)

Tracking Resistance
CTI
(Comparative Tracking Index)
≥175
Volts
Isolation Group
IIIa
Conditions
Measured from input terminals to output
terminals, shortest distance through air.
Measured from input terminals to output
terminals, shortest distance path along body.
Insulation thickness between emitter and
detector; also known as distance through
insulation.
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
All Avago data sheets report the creepage and clearance
inherent to the optocoupler component itself. These
dimen­sions are needed as a starting point for the equip-
ment designer when determining the circuit insulation
requirements. However, once mounted on a printed
circuit board, minimum creepage and clearance require­
ments 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.
There are recommended techniques such as grooves
and ribs which may be used on a printed circuit board to
achieve desired creepage and clearances. Creepage and
clearance distances will also change depending on fac-
tors such as pollution degree and insulation level.