Spire JEWEL BLACK 420W / SP-ATX-420WTB-PFC-1 - Manual (Page 15)

Version:A/0 Page 15 of 20
Spire Corp.
Http://www.spirepower.com & Http://www.spirecoolers.com
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6 Reliability
6.1 Component Derating
The following component derating guedelines are recommended:
‧
Semiconductor junction temperatrues shall not exceed 110℃ with an ambient
of 50℃.
‧
Inductor case temperature shall not exceed safety agency requirements.
‧ Capacitor case temperature shall not exceed 95% of rated temperature.
‧ Component voltage and current derating shall be >10% at 50℃.
‧ Magnetic saturation of any transformer will not be allowed under any line, load,
startup or transient condition including 100% transients on the five main outputs or
+5VSB.
6.2 Mean Time Between Failures(MTBF)
The power supply reliability is based on the calculation with the Part-Stress Analysis
method of MIL-HDBK-217F using the quality factors listed in
MIL-HDBK-217F. The power supply MTBF is 100,000 hours under the
following conditions:
- Full-rated
load
- 230VAC
input
- Ground
begin
- 25℃ ambient
7.Correlative Certification compliance
Item # Certification type Certification Number
Certification
listing
Remark
1 ROHS WT06060878A1/-S-R
www.waltek.com.cn
EMC CT10031986-S-E www.ccetest.com
2
LVD CT10031987-S-L www.ccetest.com