Tyco Electronics has introduced the PolyZen ZEN059V130A24LS device. This integrated device helps to provide complete circuit protection for electronics with USB ports and to meet suspend mMode power-consumption requirements for USB 3.0. The USB 3.0 specification allows the devices to consume 900mA of operating current. PolyZen devices are polymer-enhanced Zener diodes that help provide co-ordinated protection against damage caused by over-voltage, over-current, and ESD transients in a single package. Due to the device's polymer thermal-protection architecture, it is able to absorb high-energy pulses and effectively block over-voltage and reverse bias sources that could ultimately damage a standalone Zener diode. With a Zener voltage below 6V, it helps protect sensitive downstream electronics, and its low 5V power consumption meets USB 3.0 suspend mMode requirements. For USB 3.0 devices, the device can be placed on the USB input port, the powered-B plug, and/or, where applicable, any supplementary power port. The device offers designers the simplicity of a high-power clamping diode while obviating the need for significant heat sinking.
