Circuit Protection - Communications
Communications
Telecommunications devices are required to meet industry standards, including protecting against lightning, power fault events and ESD. TE Circuit Protection offers a broad line of overcurrent and overvoltage devices that can help telecommunications equipment meet these standards.
When an unsuitable or faulty USB cable is plugged into the USB port, the applied voltage, polarity and permitted current may exceed the specifications of the power regulation circuits. This can damage the equipment and could become a safety concern.
Current-limiting devices are most important in protecting communications equipment from long duration faults, during which joule heating can result in a fire hazard, or can damage thermally sensitive components. Our Polyswitch devices limit the flow of dangerously high currents.
PolySwitch devices limit the flow of dangerously high currents during fault conditions that can occur when and reset back to normal operating mode once the fault condition is removed.
Small, mid sized DC electric motors can overheat and cause damage to temperature sensitive components. To help protect these components, custom made PolySwitch devices can be designed for specific customer applications. Installing a PolySwitch device in close proximity to the motor offers the added benefit of limiting current due to excessive heat.
PESD help shunt ESD away from sensitive circuitry in electronic devices without inducing signal distortion.
A growing number of POE applications such as IP based CCTV, wireless LAN or IP telephony, vending machines, etc. have created a demand for more reliable and flexible overcurrent protection devices. These devices are required to protect power source equipment (PSE) from damage due to shorts in the Ethernet cable Powered Device (PD) from faults in PSE.
Power line networking devices are directly connected to AC mains and can be exposed to severe surge transients and short circuit/ overload conditions.
A PolySwitch resettable device can be thermally linked to the LCD glass can protect the power module is the control circuitry fails to turn off the element and help prevent thermal runaway.
An overcurrent / overtemperature event may occur in a battery cell due to short circuit, abusive charging or charger failure. PolySwitch axial-leaded and disk devices help protect against overcurrent or overtemperature faults.
PolySwitch resettable devices can be used to help protect the delicate printed circuit board traces against damage caused by overcurrent conditions.
Hard-disk drives must be protected from incorrect voltages due to misconnection of 12V, 5V, and/or 3.3V lines during installation. The variations in the host-computer power supplies may also result in AC ripple or incorrect polarity that can damage the tantalum capacitors on the drives.
Cable telephony electronics that are powered via a twisted pair or coaxial cable are susceptible to power faults passed through the cable.
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