Miniature PolyZen Devices

Littelfuse
Part Number Information
Part #: Price/Availability:
ZEN05 Buy Now
ZEN06 Buy Now
ZEN13 Buy Now

PolyZen devices are polymer-enhanced, precision Zener diodes. They offer resettable protection against multi-Watt fault events without the need for multi-Watt heat sinks. The Zener diode used for voltage clamping a PolyZen device was selected due to its relatively flat voltage vs. current response. This helps improve output voltage clamping, even when input voltage is high and diode currents are large.

An advanced feature of the PolyZen device is that the Zener diode is thermally coupled to a resistively non-linear, PPTC (polymer positive temperature coefficient) layer. This PPTC layer is fully integrated into the device and is electrically in series between VIN and the diode clamped VOUT.

Features

  • Overvoltage transient suppression
  • Stable VZ vs. fault current
  • Time delayed, overvoltage trip
  • Time delayed, reverse bias trip
  • Multi-Watt power handling capability
  • Integrated device construction
  • RoHS compliant

Applications

  • DC power port protection in portable electronics
  • DC power port protection for systems using barrel jacks for power input
  • Internal overvoltage and transient suppression
  • DC output voltage regulation
  • Tablet PCs and portable electronic

Resources