
ADM2491E
Rev. B | Page 5 of 16
INSULATION AND SAFETY-RELATED SPECIFICATIONS
Table 5.
Parameter
Symbol
Value
Unit
Conditions
Rated Dielectric Insulation Voltage
5000
V rms
1 minute duration
Minimum External Air Gap (Clearance)
L(I01)
7.7
mm min
Measured from input terminals to output
terminals, shortest distance through air
Minimum External Tracking (Creepage)
L(I02)
8.1
mm min
Measured from input terminals to output
terminals, shortest distance along body
Minimum Internal Gap (Internal Clearance)
0.017
mm min
Insulation distance through insulation
Tracking Resistance (Comparative Tracking Index)
CTI
>175
V
DIN IEC 112/VDE 0303 Part 1
Isolation Group
IIIa
Material Group (DIN VDE 0110, 1/89)
VDE 0884 INSULATION CHARACTERISTICS
This isolator is suitable for basic electrical isolation only within the safety limit data. Maintenance of the safety data must be ensured by
means of protective circuits.
An asterisk (*) on a package denotes VDE 0884 approval for 848 V peak working voltage.
Table 6.
Description
Symbol
Characteristic
Unit
Installation Classification per DIN VDE 0110 for Rated Mains Voltage
≤300 V rms
I to IV
≤450 V rms
I to II
≤600 V rms
I to II
Climatic Classification
40/105/21
2
Maximum Working Insulation Voltage
V
IORM
846
V peak
Input-to-Output Test Voltage, Method b1
V
PR
1590
V peak
V
IORM × 1.875 = VPR, 100% Production Tested, tm = 1 sec, Partial Discharge < 5 pC
Input-to-Output Test Voltage, Method a
V
PR
After Environmental Tests, Subgroup 1
1357
V peak
V
IORM × 1.6 = VPR, tm = 60 sec, Partial Discharge < 5 pC
After Input and/or Safety Test, Subgroup 2/Subgroup 3
1018
V peak
V
IORM × 1.2 = VPR, tm = 60 sec, Partial Discharge < 5 pC
Highest Allowable Overvoltage (Transient Overvoltage, t
TR = 10 sec)
V
TR
6000
V peak
Safety-Limiting Values (Maximum Value Allowed in the Event of a Failure, s
ee Figure 20)Case Temperature
T
S
150
°C
Input Current
I
S, INPUT
265
mA
Output Current
I
S, OUTPUT
335
mA
Insulation Resistance at T
S, VIO = 500 V
R
S
>109