CCL400 Series

www.xppower.com

01 Feb 16

AC-DC Power Supplies

Estimated Service Life vs Component Temperature

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 direct air flow). See below for component locations.

The estimated service life of the CCL400 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 capacitors with in the product when installed by the end application. The worst case of the two figures should be taken as the indicative

service life in 24/7 operation.

The graph below expresses the estimated lifetime of a given component temperature and assumes continuous operation at this temperature.

Temperature Measurements (At Ambient 50 °C)

Component

Max Temperature °C

L2 Coil

120 ° C

TR28 Body

120 ° C

C64

105 ° C

C39

105 ° C

Thermal Considerations

Service Life

C39

TR28

L2

C64

0

50000

100000

150000

200000

250000

300000

350000

105

95

85

C39 Temperature (°C)

75

65

55

C64 Temperature (°C)

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

105

95

85

75

65

55