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Thermal Considerations
In order to ensure safe operation of the PSU in the end-use equipment, the temperature of the components listed in the table below must not be
exceeded. Temperature should be monitored using K type thermocouples placed on the hottest part of the component (out of any direct air flow). See
Mechanical Details for component locations.
Temperature Measurements (Ambient ≤ 50 ºC)
Component
Max Temperature ºC
120 ºC
L2
C12
C21
105 ºC
105 ºC
Service Life
The estimated service life of the CCM250 Series is determined by the cooling arrangements and load conditions experienced in the end application.
Due to the uncertain nature of the end application this estimated service life is based on the actual measured temperature of a key capacitor within the
product when installed in the end application.
The graph below expresses the estimated lifetime for a given component temperature and assumes continuous operation at this temperature.
Estimated Service Life vs Component Temperature
Figure 20
185000
165000
145000
125000
105000
85000
65000
45000
25000
5000
105
95
85
75
65
55
C64 Temperature (°C)
12
10-Sep-13
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