UEI30 Series
30W Isolated Wide-Range DC/DC Converters
Mean Time Before Failure (MTBF) Table
These figures use a standard MTBF probability calculation as an indication of component parts stress and life derating. The calculaton is based on separate MTBF
values for all internal parts in addition to stated environmental conditions. Two MTBF values are presented. The Telcordia method is widely used in industry, partic-
ularly telecom. The United States MIL-HDBK method is for military and industrial applications. Please refer to a qualified reliability engineer for more background.
Model Number
UEI30-033-Q12N-C
UEI30-033-Q12N-C
UEI30-033-Q12P-C
UEI30-033-Q12P-C
UEI30-033-Q48N-C
UEI30-033-Q48N-C
UEI30-033-Q48P-C
UEI30-033-Q48P-C
UEI30-050-Q12N-C
UEI30-050-Q12N-C
UEI30-050-Q12P-C
UEI30-050-Q12P-C
UEI30-120-Q48N-C
UEI30-120-Q48N-C
UEI30-120-Q48P-C
UEI30-120-Q48P-C
UEI30-150-Q48N-C
UEI30-150-Q48N-C
UEI30-150-Q48P-C
UEI30-150-Q48P-C
MTBF (Hours)
2,676,902
2,123,124
2,733,781
2,142,206
3,416,592
3,172,548
3,427,027
3,193,652
2,531,509
2,207,508
2,554,127
2,229,031
3,072,461
2,510,927
2,900,319
2,495,846
2,833,366
2,408,836
2,776,615
2,421,938
Method [1,2]
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Telcordia
MIL-HDBK
Notes:
[1] Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method
1, Case 3, ISSUE 2, ground fixed controlled conditions, Tambient=+25°C, full output load,
natural air convection.
[2] Mean Time Before Failure is calculated using MIL-HDBK-217FN2, GB ground benign,
Tambient=+25°C, full output load, natural air convection.
www.murata-ps.com
14 Dec 2009
email: sales@murata-ps.com
MDC_UEI Series 30W.A13_long
Page 10 of 16
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