0
10
20
30
40
50
60
70
49
55
24
27
3
72
0
10
20
30
40
50
60
T
A
[°C]
I
TH
2
[A
2
]
27 °C x 0.906
≈
24 °C
55 °C x 0.906
≈
49 °C
Example
1 Description ESR5-BWS-31-24VDC
15
ESR5-BWS-31-24VDC
11/23 MN049020EN Eaton.com
▶
1.Reduce the maximum ambient temperature for operation by the corre-
sponding temperature derating factor as per the following table.
▶
2.If derating is required, shift all the points in the derating curve by the
temperature derating factor.
Calculation example for shifting the derating curve
Figure 8:
Example: Shifted derating curve (blue) at altitude of 3000 m above sea level
1.14 Load curve – resistive load
I [A]
DC
U[
V
]
DC
0,1
0,2
0,5
1
2
5
10
10
20
50
100
500
1000
200
Figure 9:
Load curve of the relay – resistive load
Altitude above sea
level
Temperatur-Derating-Factor
2000 m
1
2500 m
0.953
3000 m
0.906
3500 m
0.859
4000 m
0.813
4500 m
0.766
￫
Carry out the calculation and shift the derating curve as required
for your application
