Brochure

ESG
8.438.43
8.438.43
8.43
Application notes
Contact free switching in all domains
Solid state relays from Selectron Systems AG are
particularly suitable for ranges where high currents have
to be switched fast, such as e.g. in regard of the tempera-
ture control on heatings or where there are strong
vibrations (no moving mechanical parts), or when there
are heavy environmental conditions such as high humidi-
ty, extreme temperatures etc.
• Ac load voltage range up to 660Vac
• Ac load current range up to 125A
• Dc load voltage range up to 110Vdc
• Dc load current range up to 40A
• Zero cross turn-on
• Random turn-on
• Maintenance-free
• High switching frequency
• Operating temperature -55°C bis +100°C
The Surface Mount Technology SMT
All relays from Selectron Systems AG are based on SMT
technology. Due to an up to date equipping technique
the error rates could be decisively decreased. All result
in unsurpassed reliability.
SSRs exceed 2.000.000 operating hours
The reliability levels achieved through this and other
refinements of manufacturing are reflected in quality
assurance calculations for "observed" mean time bet-
ween failures (MTBF).
The calculation is done by estimating the number of
device operating hours for a particular relay family and
dividing this figure by the number of non-misapplication
related field failures. A conservative assumption is used
in which we assume 10% of non-misapplication related
field failures are actually returned to us.
Calculated mean time between failures is, depending
upon the family or type involved, between 2.000.000
and 40.000.000 operating hours.
The Test Advantage
All Selectron Systems AG SSRs are subjected to the
following comprehensive series of tests (with conservati-
ve guard bands) on 100% of all products both before and
after encapsulation. The quality assurance test steps are
as follows:
• Verify true Kelvin sense connections fpr Vf measure-
ment
• Forward voltage drop
• Blocking voltage
• Turn-on voltage (ac or dc depending on model)
• Turn-off voltage (ac or dc depending on model)
• Proper operation with resistive load
• Proper operation at 0.5 power factor, inductive load
• Leakage current at rated voltage
• Isolation voltage input-output and output-base