Non ferrous TVS arrays designed specifically for MRI machines

The new devices were designed specifically for MRI machines to guard against circuit damage caused by electrostatic discharge, electrical fast transients, and the effects of secondary lightning. The USBQNM504xx and USBQNM504xxC TVS arrays are available now and have already been qualified for use by a major medical equipment manufacturer. "Our high performance TVS arrays use non ferrous metal in their packaging, which makes them ideally suited for operation in MRI machines and other medical devices that operate in powerful magnetic environments," said Simon Wainwright, vice president of Marketing and Business Development for Microsemi's HiRel Group. "This capability adds another layer of protection against damaging voltage spikes that can corrupt data in sensitive medical equipment and render inaccurate results that may negatively impact patient health." The USBQNM504xx and USBQNM504xxC TVS arrays are designed to protect uni and bi directional lines, respectively. The new environmentally friendly, halogen free solutions are offered in a non ferrous, quad flat no lead 143pin metal lead frame. The RoHS compliant 'green' enclosure is also pin for pin compatible with SOT-143 packages. Additional features include: peak power rating of 500W for an 8/20µs pulse; protection against electrostatic discharge as defined in IEC 61000-4-2, electrical fast transients per IEC 61000-4-4 and effects of secondary lightning; and board level protection for sensitive circuitry including TTL, CMOS, DRAMs, SRAMs, HCMOS, HSIC microprocessors, and USB and I/O transceivers.