TDK-Lambda LS Series User Manual - 5. Mounting Directions
1
・All specifications are subject to change without notice.
LS
Series
5. Mounting Directions
(a) Input - FG (chassis) : solid line 1.5kVAC, 1min (20mA)
(b) Input - Output : dotted line 3kVAC, 1min ( 20mA )
(c) Output - FG (chassis) : 500VAC, 1min (100mA)
Output Derating according to the Mounting Directions
Recommended standard mounting is Method (A). Method (B),
(C) and (D) are also possible. Refer to the Output Derating below.
Please do not use installation Method (E), where the PCB will be
on the topside and heat will be trapped inside the unit.
In the following derating curve, the maximum output current is
is denoted as 100%.
STANDARD MOUTING (A)
(B)
(C)
(D)
(E) Not Possible
(1) Output Derating versus Ambient Temperature (Con-
vection Cooling)
LS25-3.3
Load (%)
Ambient Temperature (ºC)
120
100
80
60
40
20
0
-25
0
25
50
75
100
50
65
40
70
Mounting
A & D
Mounting
B & C
Output Derating Vs Ambient Temperature
LS25-5, -12, -15, -24, -36 & -48
Load (%)
Ambient Temperature (ºC)
120
100
80
60
40
20
0
-25
0
25
50
75
100
50
65
40
70
Mounting
A & D
Mounting
B & C
Output Derating Vs Ambient Temperature
LS35-3.3, -5, -12, -15, -24, -36 & -48
Load (%)
Ambient Temperature (ºC)
120
100
80
60
40
20
0
-25
0
25
50
75
100
50
65
45
70
Mounting
A, B & D
Mounting C
Output Derating Vs Ambient Temperature
LS50 -3.3, -5, -12, -15, -24, -36 & -48
Load (%)
Ambient Temperature (ºC)
120
100
80
60
40
20
0
-25
0
25
50
75
100
50
70
60
40
70
Mounting
A, B & D
Mounting C
Output Derating Vs Ambient Temperature
AC(N)
Withstand
Voltage
Tester
AC(L)
FG
+V
+V
-V
-V
AC(N)
AC(L)
FG
+V
+V
-V
-V
Withstand
Voltage
Tester