¡
The operative ambient temperature is different by with / without
chassis cover or mounting position. Derating curve is shown below.
Note: In the hatched area, the specification of Ripple, Ripple
Noise is different from other area.
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LFA10F
¿
LFA15F
¿
LFA30F
¿
LFA50F
Table 3.8 Temperatures of Point A, Point B LFA240F-
O
Mounting
Method
Cooling
Method
Load factor
Max temperature
Point A[
C
]
Point B[
C
]
A
Convection
75%
<
Io
[
100%
75
70
50%
<
Io
[
75%
82
79
Io
[
50%
86
85
B
Convection
75%
<
Io
[
100%
63
61
50%
<
Io
[
75%
73
73
Io
[
50%
81
83
C
Convection
75%
<
Io
[
100%
76
73
50%
<
Io
[
75%
81
79
Io
[
50%
87
85
D
Convection
75%
<
Io
[
100%
66
55
50%
<
Io
[
75%
74
65
Io
[
50%
84
78
E
Convection
75%
<
Io
[
100%
62
62
50%
<
Io
[
75%
73
74
Io
[
50%
81
84
F
Convection
75%
<
Io
[
100%
68
62
50%
<
Io
[
75%
77
73
Io
[
50%
84
83
A,B,C,D,E,F Forced air
70%
<
Io
[
100%
75
75
Io
[
70%
75
75
Table 3.9 Temperatures of Point A, Point B, Point C, Point D LFA300F-
O
Mounting
Method
Cooling
Method
Load factor
Max temperature
Point A[
C
] Point B[
C
] Point C[
C
] Point D[
C
]
A
Convection
80%
<
Io
[
100%
70
86
60%
<
Io
[
80%
75
88
Io
[
60%
79
89
B
Convection
80%
<
Io
[
100%
57
68
60%
<
Io
[
80%
62
71
Io
[
60%
71
79
C
Convection
80%
<
Io
[
100%
69
75
60%
<
Io
[
80%
74
75
Io
[
60%
83
82
D
Convection
80%
<
Io
[
100%
58
62
60%
<
Io
[
80%
64
66
Io
[
60%
75
75
E
Convection
80%
<
Io
[
100%
57
80
60%
<
Io
[
80%
63
83
Io
[
60%
74
88
F
Convection
80%
<
Io
[
100%
61
68
60%
<
Io
[
80%
68
71
Io
[
60%
76
80
A,B,C,D,E and F
(3.3V/5V/12V/15V)
Forced air
50%
<
Io
[
100%
75
75
85
85
Io
[
50%
75
75
85
85
A,B,C,D,E and F
(24V/30V/36V/48V)
Forced air
50%
<
Io
[
100%
75
75
85
85
Io
[
50%
75
75
85
85
AC-DC Power Supplies Open Frame/ Enclosed Type
Instruction Manual
LFA-26
LFA
*
Inside[ ] is with case cover
*
Inside[ ] is with case cover
Fig.3.3 Ambient temperature derating curve (refer to Table 3.1)
Fig.3.4 Ambient temperature derating curve (refer to Table 3.2)
*
Inside[ ] is with case cover
*
Inside[ ] is with case cover
Fig.3.5 Ambient temperature derating curve (refer to Table 3.3)
Fig.3.6 Ambient temperature derating curve (refer to Table 3.4)
-10
70 [60]
60 [50]
50 [40]
40
30
1
1
2
)
2
Forced air (0.5m
3
/ min
1
Convection
80
100
60
40
35
20
0
20
10
0
Load
factor
[%]
[
C
]
Ambient temperature
(B), (C)mounting
(A), (D), (E), (F)mounting
(A) ~ (F)
mounting
-10
70 [60]
60 [50]
50 [40]
[30]
40
30
1
1
2
)
2
Forced air (0.5m
3
/ min
1
Convection
80
100
60
40
35
20
0
20
10
0
Load
factor
[%]
[
C
]
Ambient temperature
(A), (B), (C), (D)mounting
(E), (F)mounting
(A) ~ (F)
mounting
-10
70 [60]
60 [50]
50 [40]
40 [30]
30
1
1
2
2
Forced air (0.5m
3
/ min)
1
Convection
80
100
60
40
20
0
20
10
0
Load
factor
[%]
[
C
]
Ambient temperature
(A), (C)mounting
(D), (E)mounting
1
(F)mounting
(A) ~ (F)
mounting
1
(B)mounting
-10
70 [50]
60 [40]
50 [30]
40 [20]
30 [10]
1
1
2
2
Forced air (0.5m
3
/ min)
1
Convection
80
100
60
40
20
0
20
10
0
Load
factor
[%]
[
C
]
Ambient temperature
(B)mounting
(D)mounting
1
(C), (E)mounting
1
(F)mounting
(A) ~ (F)
mounting
1
(A)mounting
me̲lfa1.indd LFA-26
me lfa1 indd LFA-26
2015/06/15 15:22:54
2015/06/15 15:22:54
