PolySwitch devices for telecommunication and networking applications were initially designed over ten years ago to meet the growing demand for resettable overcurrent protection. These product families help provide protection against power cross and power induction surge as defined in ITU, Telcordia, and UL. Available in chip, surface-mount, and radial-leaded configurations, PolySwitch devices help improve the reliability of customer premise and network equipment world wide.
Find out more about the new PolySwitch TSM600-400F designed to meet the new issue 3 of Telcordia GR-1089.
Part Numbering System for PolySwitch Telecommunications and Networking Devices
Agency Recognition for Telecommunications and Networking Devices*
Standard
File Number
UL
E74889
CSA
78165C
TUV
Per IEC60730-1
Note: *For agency recognition information on BBR and RXE series, see radial-leaded product page. For SMD, midSMD and miniSMDC series, see surface-mount product page.
Recommended Pad Layout for PolySwitch Telecommunications Surface-Mount Devices
Solder Reflow and Rework Recommendations for PolySwitch Telecommunications and Surface-Mount Devices
Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame.
The devices are intended for protection against occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated.
Contamination of the PPTC material with certain silicon based oils or some aggressive solvents can adversely impact the performance of the devices.
Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical procedures for electronic components.
Operation in circuits with a large inductance can generate a circuit voltage (L di/dt) above the rated voltage of the PolySwitch resettable device.