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TVS - Varistors, MOVs

Transient Voltage Suppressors (TVS), also known as varistors or MOVs (Metal Oxide Varistors), are components that provide protection against voltage transients, such as spikes and surges, by absorbing and then dissipating undesirable voltages.

VCUG040030L1WP application field and working principle

The VCUG040030L1WP is a TVS/Varistor/MOV specifically designed to protect l-band receivers from excessive contact voltage surges in 1 to 17 Ghz frequency. It is designed for protection against induced transient voltage surges of up to 30V, 34V peak, and tolerates long duration transients of up to 70V. With its Impedance matching of under 1 ohm, the VCUG040030L1WP offers excellent surge handling capability that significantly exceeds that of standard MOVs.

In terms of working principle, TVS components typically protect against electrostatic discharge (ESD) and lightning-induced transients. The destructive transient energy is stored in the component’s pn-junction varistors. When an excessive voltage beyond the device’s breakdown range is applied, an avalanche voltage breakdown occurs. Consequently, the stored energy is suddenly discharged or consumed by the transistor circuit.

TVS devices contain several components, namely, thyristor, a silicon transistor, a Zener diode-controlled transistor and a voltage regulator. When an excessive voltage is applied, the thyristor will endure the stress and cause the Zener diode to break down. This in turn will cause the silicon transistor to turn off and regulate the voltage to the acceptable levels. The self-regulating mechanism associated with TVS components enables them to offer superior protection against damaging voltage transients as compared to MOVs.

TVS components also offer higher peak power/energy handling capabilities, more robust protection in a wide frequency range, a lower leakage current, and a longer life than standard MOVs. This makes them ideal for applications where high surge handling is critical, such as when employed in l-band receivers.

In conclusion, the VCUG040030L1WP is a robust transient voltage suppressor specifically designed for l-band receivers. It is highly effective in providing protection against voltage transients, and is a far better alternative to standard MOVs, due to its enhanced surge handling capability and superior power/energy handling. It is a reliable and cost-effective solution that makes it suitable for numerous applications.

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