4
All Avago data sheets report the creepage and clearance inherent to the optocoupler component itself. These dimen-
sions 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
specied for individual equipment standards. For creepage, the shortest distance path along the surface of a printed
circuit board between the solder llets 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 factors such as pollution degree and in-
sulation level.
Insulation and Safety Related Specications
Parameter Symbol Value Units Conditions
Minimum External Air Gap
(Clearance)
L(101) 7.1 mm Measured from input terminals to output terminals, shortest
distance through air.
Minimum External Tracking
(Creepage)
L(102) 7.4 mm Measured from input terminals to output terminals, shortest
distance path along body.
Minimum Internal Plastic Gap
(Internal Clearance)
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 Volts DIN IEC 112/VDE 0303 Part 1
Isolation Group
(DIN VDE0109)
IIIa Material Group (DIN VDE 0110)
IEC/EN/DIN EN 60747-5-5 Insulation Related Characteristics
[1]
Description Symbol ACPL-312U Units
Installation classication per DIN VDE 0110/1.89, Table 1
for rated mains voltage ≤150 V rms
for rated mains voltage ≤300 V rms
for rated mains voltage ≤450 V rms
for rated mains voltage ≤600 V rms
for rated mains voltage ≤1000 V rms
I-IV
I-IV
I-III
Climatic Classication 55/125/21
Pollution Degree (DIN VDE 0110/1.89) 2
Maximum Working Insulation Voltage V
IORM
630 V
PEAK
Input to Output Test Voltage, Method b
V
IORM
x 1.875 = V
PR
, 100% Production
Test t
m
= 1 sec, Partial Discharge < 5 pC
V
PR
1181 V
PEAK
Input to Output Test Voltage, Method a
V
IORM
x 1.6 = V
PR
, 100% Type and Sample Test
t
m
= 10 sec, Partial Discharge < 5 pC
V
PR
1008 V
PEAK
Highest Allowable Overvoltage
(Transient Overvoltage, t
ini
= 60 sec)
V
IOTM
6000 V
PEAK
Safety Limiting Values
(Maximum values allowed in the event of a failure,
also see Thermal Derating curve, Figure 11.)
Case Temperature
Input Current
Output Power
T
s
I
s, INPUT
Ps
,OUTPUT
175
230
600
°C
mA
mW
Insulation Resistance at T
S
, V
10
= 500 V R
IO
≥10
9
Ω
Notes:
1. Insulation characteristics are guaranteed only within the safety maximum ratings, which must be ensured by protective circuits within the
application.