Panasonic is part of a large worldwide groupselling relays and associated switching products under different brand names in different territories.The conditions of use in some territories may differ from those customary in Europe. In particular there are often major differences in regard to national and international specifications, such as UL, CSA, VDE, SEV, EVE, SEMKO, etc. Thus, when considering contact loads as stated in this catalogue (e.g. 10 A, 30 VDC for the SP relay) its hould be understood that these values are not necessarily an absolute maximum but tested ratings. Mostly the stated value has been tested for a certain life expectancy as stated by the manufacturer or the respective test house. Thus, under different conditions, the stated “maximum” may, in practice, be safely exceeded.
2. Bathtub Curve
P ct's ilu rate its life tim icte curve, below Failure rate high the and end
o its service lifetim e. riod, lle ccid ilu riod, ilu s
o ndom alon tim axis. hile zero ccid ilu rate sira ctu lly ractical real orld . use inte ccid ilu period, and period
virtu lly rvice life tim relay.
(I) Initial ilu period
The high ilu rate initial ilu riod rive fro sig rrors, rrors, is
pro lle rfo scre fin initial failures.
(II) ccid ilu period
The initial ilu period llo long riod ith low, stab ilu rate.
. The tim r-o ilu can icte ith a
ce rta ccu fro cord uses. What Failure?
F ilu fin state system ich all its tio are ire lost.
(III) r-o ilu period
In fina stag the t's service life tim r-o ilu period, ich the life the ire r
o tig reve ntive ffe ctive typ failure.
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TechnicalInfo.AUTOMOTIVE CAUTIONS FOR USE
[3] Failure
1
