Telephony equipment like DSL modems are susceptible to damage caused by lightning and ESD surges, power contact and
induction with AC lines since they connect to the copper infrastructure of the Public Switched Telephone Network (PSTN). If left unprotected from these hazards, CPE (Customer
Premise Equipment) may fail or may pose a safety risk for subscribers and maintenance
personnel.
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Solution: 2Pro devices.
The RoHS-compliant 2Pro device incorporates PolySwitch PPTC (polymeric positive temperature coefficient) overcurrent technology with an MOV (metal oxide varistor) component into one innovative, thermally protected device to help provide resettable current limiting during overcurrent events and voltage clamping during overvoltage events.
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Solution: PolySwitch devices for telecommunication and networking applications.
PolySwitch devices help limit the flow of dangerously high currents during fault conditions and reset back to normal operating mode once the fault condition is removed.
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Solution: SiBar thyristors.
SiBar thyristors have a high electrical surge capability to help protect against transient
faults and a high off-state impedance, rendering them virtually transparent
during normal system operation.
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Circuit Diagram / Schematic
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