GCS Series

AC-DC Power Supplies

www.xppower.com

21-Sept-15

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 Mechanical Details for component locations.

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The estimated service life of the GCS 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

Component

Max Temperature °C

T1 Coil

120 ° C

L3 Coil

120 ° C

Q1 Body

120 ° C

Q3 Body

120 ° C

C6

105 ° C

C23

105 ° C

Thermal Considerations

Service Life

0

20000

40000

60000

80000

100000

120000

105

95

85

75

65

55

C6 Temperature (°C)

0

10000

20000

30000

40000

50000

60000

70000

105

95

85

75

65

55

C6 Temperature (°C)

5000

25000

45000

65000

85000

105000

125000

145000

165000

185000

105

95

85

75

65

C23 Temperature (°C)

55

GCS150/180

GCS250

GCS350

GCS350

GCS150/180

GCS250

5000

25000

45000

65000

85000

105000

125000

145000

165000

185000

105

95

85

75

65

C6 Temperature (°C)

55

5000

25000

45000

65000

85000

105000

125000

145000

165000

185000

105

95

85

75

65

C23 Temperature (°C)

55

5000

25000

45000

65000

85000

105000

125000

145000

165000

185000

105

95

85

75

65

C23 Temperature (°C)

55