Product category:
Circuit Protection Devices
News Release from: Raychem Circuit Protection | Subject: PolyZen
Edited by the Electronicstalk Editorial
Team on 15 September 2006
Protective device promises best of both
worlds
PolyZen devices help protect sensitive electronics from damage caused by inductive voltage spikes, voltage transients, incorrect power supplies and reverse bias.
Raychem Circuit Protection has announced the introduction of its PolyZen polymer enhanced, precision Zener diode microassembly Designed to meet the growing need for overcurrent and overvoltage protection on portable equipment that uses barrel jacks for DC power input, the PolyZen device helps protect sensitive electronics from damage caused by inductive voltage spikes, voltage transients, incorrect power supplies and reverse bias
This article was originally published on Electronicstalk on 29 Feb 2008 at 8.00am (UK)
Related stories
Polymer-enhanced diodes co-ordinate protection
By clamping and smoothing inductive voltage spikes, PolyZen devices help shield downstream electronics from overvoltage and reverse bias.
Resettable fuse protects latest AAAA NiMH cells
New from Raychem Circuit Protection, the MAC300 PolySwitch resettable fuse is custom designed for the new AAAA NiMH cells with increased capacity in a smaller space.
The new PolyZen device helps provide co-ordinated protection with a component that protects like a Zener diode, but is capable of withstanding very high power fault conditions.
The PolyZen micro-assembly incorporates a stable Zener diode for precise voltage clamping and a resistively nonlinear, polymer positive temperature coefficient (PPTC) layer that responds to either diode heating or overcurrent events by transitioning from a low to high resistance state.
The RoHS-compliant device offers power handling on an order of 100W in a 4mm package and helps provide DC power port protection for portable electronics and systems using barrel jacks for power input, as well as internal overvoltage protection and transient suppression.
Further reading
Thin strap protects thin Li-ion prismatic cells
The latest PolySwitch PPTC (polymeric positive temperature coefficient) resettable strap device from Raychem Circuit Protection offers the thinnest strap profile in the industry.
Slimline protection for lithium-polymer batteries
Raychem's new Thin-Strap line of PolySwitch resettable fuses provides enhanced protection for rechargeable battery packs typically used in cell phones, laptops and other portable equipment.
PolyZen devices help provide resettable protection against 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.
Benefits of this innovative solution include: reduction of warranty returns and customer complaints from power bus related incidents; shielding of downstream electronics from overvoltage and negative bias conditions; and reduced design costs with single component placement and minimal heatsinking requirements.
"The PolyZen device's resettable functionality and its ability to withstand high current inrush make it suitable for portable electronics and other low-power DC devices", said Adrian Mikolajczak, New Platform and Technology Marketing Manager for Raychem Circuit Protection.
"In addition to extended performance range and survivability, integrated device construction reduces heatsinking requirements and streamlines circuit design".
PolyZen devices are compatible with industry standard installation procedures, and are available in tape and reel packaging for compatibility with high-volume manufacturing.
• Raychem Circuit Protection: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
