Insulation and Safety Related Specifications
Value
Symbol 772X
Parameter
072X
Units
Conditions
Minimum External Air
Gap (Clearance)
L(I01)
7.1
4.9
mm
Measured from input terminals to output
terminals, shortest distance through air.
Minimum External
Tracking (Creepage)
L(I02)
7.4
4.8
mm
mm
Measured from input terminals to output
terminals, shortest distance path along body.
Minimum Internal Plastic
Gap (Internal Clearance)
0.08
0.08
Insulation thickness between emitter and
detector; also known as distance through
insulation.
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)
board, minimum creepage and
There are recommended
All Agilent 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
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.
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
factors such as pollution degree
and insulation level.
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