Cosel TUHS10F, Instruction Manual

Page: 8 / 9

7 Derating
¡
It is necessary to note thermal fatigue life by power cycle.
Please reduce the temperature fluctuation range as much as pos-
sible when the up and down of temperature are frequently gener-
ated.
¡
Please have sufficient ventilation to keep the temperature of point
A in Fig.7.1 at Table7.1 or below. Please also make sure that the
ambient temperature does not exceed 85
C
.
Point A (Center of the Case)
Fig.7.1 Temperature Measuring Point on the case (Top View)
Table 7.1 Point A Temperature
Model TUHS3 TUHS5 TUHS10 TUHS15 TUHS25
Output Voltage ALL ALL ALL 12V, 24V 15V ALL
Point A 105
C
105
C
105
C
100
C
95
C
100
C
7.1 Derating curve(TUHS3)
¡
Derating curve is shown below. Note: In the hatched area, the
specification of Ripple, Ripple Noise is different from other area.
85
0
20
40
60
80
Convection (0.2m/s),Forced air (2.0m/s)
Load factor[%
]
100
0 20 100
Ambient temperature[
C
]
40 -40 -20 60 80
Fig.7.2 Ambient temperature Derating curve(TUHS3)
7.2 Derating curve(TUHS5)
¡
Derating curve is shown below. Note: In the hatched area, the
specification of Ripple, Ripple Noise is different from other area.
0 20
85 75
75
100
0
20
40
60
80
100
Convection(0.2m/s)
1
TUHS5F05,TUHS5F12,TUHS5F15
2
TUHS5F24
Ambient temperature[
C
]
Load factor[%
]
40 -40 -20 60 80
Fig.7.3 Ambient temperature Derating curve(convection cooling)
85
0
20
40
60
80
Forced air(2.0m/s)
Load factor[%
]
100
0 20 100
Ambient temperature[
C
]
40 -40 -20 60 80
Fig.7.4 Ambient temperature Derating curve(Forced air)
7.3 Derating curve(TUHS10)
¡
Derating curve is shown below. Note: In the hatched area, the
specification of Ripple, Ripple Noise is different from other area.
85
0
20
40
60
80
Convection(0.2m/s)
1
TUHS10F05,TUHS10F15
2
TUHS10F12,TUHS10F24
55
Load factor[%
]
100
0 20 100
Ambient temperature[
C
]
40 -40 -20 60 80
Fig.7.5 Ambient temperature Derating curve(convection cooling)
75 85
0
20
40
60
80
Forced air(2.0m/s)
1
TUHS10F05,TUHS10F15
2
TUHS10F12,TUHS10F24
Load factor[%]
100
0 20 100
Ambient temperature[
C
]
40 -40 -20 60 80
Fig.7.6 Ambient temperature Derating curve(Forced air)
AC-DC Power Supplies PCB Mount Type
Instruction Manual
TUHS-19