AD7400A Data Sheet
Rev. D | Page 6 of 20
DIN V VDE V 0884-10 (VDE V 0884-10) INSULATION CHARACTERISTICS
This isolator is suitable for reinforced electrical isolation only within the safety limit data. Maintenance of the safety data is ensured by
means of protective circuits.
Table 5.
Parameter Symbol Characteristic Unit
INSTALLATION CLASSIFICATION PER DIN VDE 0110
For Rated Mains Voltage ≤ 300 V rms I to IV
For Rated Mains Voltage ≤ 450 V rms I to II
For Rated Mains Voltage ≤ 600 V rms I to II
CLIMATIC CLASSIFICATION 40/105/21
POLLUTION DEGREE (DIN VDE 0110, Table 1) 2
MAXIMUM WORKING INSULATION VOLTAGE V
IORM
891 V peak
INPUT-TO-OUTPUT TEST VOLTAGE, METHOD B1
V
IORM
× 1.875 = V
PR
, 100% Production Test, t
m
= 1 sec, Partial Discharge < 5 pC V
PR
1671 V peak
INPUT-TO-OUTPUT TEST VOLTAGE, METHOD A V
PR
After Environmental Test Subgroup 1 1426 V peak
V
IORM
× 1.6 = V
PR
, t
m
= 60 sec, Partial Discharge < 5 pC
After Input and/or Safety Test Subgroup 2/Safety Test Subgroup 3 1069 V peak
V
IORM
× 1.2 = V
PR
, t
m
= 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, ALSO SEE Figure 4)
Case Temperature T
S
150 °C
S1
S2
INSULATION RESISTANCE AT T
S
, V
IO
= 500 V R
S
>10
9
Ω
CASE TEMPERATURE (°C)
SAFETY-LIMITING CURRENT (mA)
0
0
350
300
250
200
150
100
50
50 100
150 200
SIDE 1
SIDE 2
07077-026
Figure 4. Thermal Derating Curve, Dependence of Safety-Limiting Values
with Case Temperature per DIN V VDE V 0884-10
