PolyZen devices are polymer enhanced precision Zener
diode micro-emblies that help protect sensitive
electronics from damage caused by inductive voltage
spikes, voltage transients, use of incorrect power supplies
and reverse bias.
The PolyZen micro-embly incorporates a stable
Zener diode for precise voltage clamping and
resistively non-linear, polymeric positive temperature
coefficient (PPTC) layer that responds to either diode
heating or overcurrent events by transitioning from
low to high resistance state.
PolyZen devices help provide resettable protection
against damage caused by multi-watt fault events and
require only 0.7W power dissipation. In the event of
sustained high power conditions, the PPTC element of
the device “trips” to limit current and generate voltage
drop. This functionality helps protect both the Zener
and the follow-on electronics, effectively increasing the
diode’s power handling capacity.