Tyco Electronics PolyZen Devices Now Stocked by Digi-Key Digi- Key Corporation announced today that it has expanded its line of Tyco Electronics Raychem Circuit Protection Products to include the PolyZen family of polymer-protected Zener diodes. PolyZen devices are polymer-enhanced precision Zener diode micro-assemblies that help protect sensitive electronics from damage caused by inductive voltage spikes, voltage transients, incorrect power supplies and reverse bias. The PolyZen micro-assembly incorporates a stable Zener diode for precise voltage clamping and a resistively non-linear, polymeric positive temperature coefficient (PPTC) layer that responds to either diode heating or overcurrent events transitioning from a low to high resistance state. These devices help provide resettable protection against damage from 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 the Zener and the follow-on…