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Set-top Box Application

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Protection Area

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Terrestrial Antenna Coaxial Cable Port Protection

Problem: Short-circuit overload

A shortcircuit overload to the power supply can occur if the central pin in the coaxial cable connection to the receiver is bent or crushed against the connector during installation; it can also occur any time the user disconnects the source from the receiver.

Solution: PolySwitch devices.

PolySwitch devices limit the flow of dangerously high currents during fault conditions and reset back to normal operating mode once the fault condition is removed.


	Read more about the Raychem Surface-mount (SMD) PolySwitch device Applicable Product Series: microSMD, nanoSMD Download SMD Datasheet - (pdf 439KB) Agency Recognition: UL E74889, TÜV R9872049, R9872048, R2172061, CSA 078165_C_000.

	Read more about the Raychem Radial-leaded (R-line) PolySwitch device Applicable Product Series: LVR Download R-line Datasheet - (pdf 707KB) Agency Recognition: UL E74889, CSA 078165_C_000, TÜV.

Problem: Transient Surge Voltages and Electrostatic Discharge (ESD)

Transient surge voltages caused by lightning strikes and equipment switching operations and also electrostatic discharge (ESD) can damage the equipment.

Solution: Raychem PESD devices.

Raychem PESD, which is a low capacitance (typically 0.25pF) ESD protection device, is capable of withstanding numerous ESD transients, and is a RoHS & IEC61000-4-2 compliant device having low leakage current and low clamping voltage.


	Read more about the Raychem ESD protection device: PESD Applicable Product(s): PESD0402, PESD0603. Download PESD Datasheet - (pdf 318 KB)

Solution: Gas Discharge Tubes (GDTs).

Gas Discharge Tubes (GDTs) help protect the sensitive data transmission lines equipment by switching to a low impedance state, and diverting energy away from the equipment. Due to their low capacitance, the GDTs introduce much less signal distortion than other overvoltage protection technologies.