Page 12 · 234B Series TEC TO-Can
LaserMount
User’s
Manual
TEC Lifetime
While the TEC elements in the
234B
are semiconductor devices, they do wear
over time. The life of a TEC module is based on several parameters, but three
parameters in particular will affect the lifetime performance of the TEC:
1.
The most damaging operation for a TEC is continuous thermal cycling,
particularly when the high temperature is near the upper operating
range of the TEC and/or where the TEC is operated near its current
limits. In these applications, anticipate a much shorter lifetime for the
TEC.
2.
Operating the TEC for prolonged periods at or near the maximum
current or temperature. While not as harsh as thermal cycling, high
operating temperatures will still degrade the TEC more quickly.
3.
Mechanical stresses caused by uneven surfaces, uneven compression,
or sheer or uneven loads. Arroyo Instruments mounts are designed to
avoid these conditions, but can still be induced by customer loads in
the final application.
The first two issues can be mitigated (lessened) by operating the TEC below its
current limit. While the
234B
has a maximum operating current of 5.6A, we
recommend operating the mount at no more than 75% of the rated current
(approximately 4.3A).
The application will dictate the thermal cycling and temperature requirements,
but understand that operating under more extreme conditions simply means the
TECs in the
234B
may need to be replaced more frequently.
In predicting lifetimes, under normal operating conditions (operating at 50% load
or less around 25°C), which is the most common application, the TECs should
last for years. Under very harsh operating conditions, TECs could wear out in as
short as 4 to 6 months, possibly even less. If you have a question on how best to
operate your mount under harsh conditions, contact the factory for additional
support.
