The lifetime of our audible components depends on many different factors and is impossible to determine exactly. We therefore publish the expected minimum lifetime measured under specific circumstances and environmental conditions.
If customers need lifetime expectations under other circumstance, we request them to ask for our instructions before performing their own lifetime tests in order to save time and exclude wrong conclusions.
Claims will only be examined and taken into account on condition that guidelines and instructions below have been strictly applied.
WORKING VOLTAGE OR DRIVE SIGNAL VERSUS EXPECTED LIFE TIME
The relationship between working voltage and expected life time is one of the prime factors on which life time depends. The curve follows an asymptotic function, strongly depending on tolerance elements published by the suppliers of several basic materials and working environmental conditions.
THE EXPECTED LIFE TIME OF OUR DIFFERENT SERIES IS DEFINED AS FOLLOWS
T ambient : 21°C; humidity : 40%; free air.
Voltage : see below.
STANDARD SERIES :
SMA SERIES :
SMAT SERIES :
SMAC SERIES :
SAS SERIES :
Life time expectations at 12 Vdc :