V47ZS1P Circuit Protection

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The V47ZS1P is a potentiometric voltage-dependent ac and dc protection device from Littelfuse. It combines a thermistor and varistor into one device, providing over-voltage surge protection with superior noise suppression. The V47ZS1P is a key component in the protection of sensitive PCBs.

Voltage-dependent Surge Protection Devices (SPDs), or commonly known as Varistors, are a common form of Transient Voltage Suppressors (TVS). The V47ZS1P is a part of this family and utilizes both thermistors and varistors for surge protection. Thermistors, also known as positively-temperature-coefficient (PTC) resistors, allow a small current to pass through them and slowly increase the resistance with temperature. This characteristic helps the V47ZS1P to defend against inrush currents and increase its breakdown voltage as the temperature rises. Varistors, also known as metal oxide varistors (MOVs), act as voltage-dependent resistors, allowing high amounts of current to pass when the voltage is below its breakdown voltage. These two components combine to form a powerful protection device capable of providing both overload and surge protection.

In addition to thermistors and varistors, the V47ZS1P contains TransZorb® Diodes as well. These devices act as reverse-biased varistors and help protect the V47ZS1P from over-voltage surges. The V47ZS1P can handle high pulsed currents in extreme conditions, making it an ideal protector for sensitive boards.

The V47ZS1P can be used in a variety of applications, including telecommunication systems, medical devices, power supplies, and automotive circuits. The device offers an adjustable breaking voltage range from 0 to 127V, making it suitable for a wide range of applications. The low profile allows it to be installed easily in tight spaces and it is compliant with the RoHS Directive, ensuring it is environmentally friendly.

In summary, the V47ZS1P is a powerful protection device used to protect sensitive PCBs and circuits. It utilizes thermistors, varistors, and TransZorb diodes to provide superior protection from over-voltage surges and inrush currents. The adjustable breaking voltage range and its low profile facilitate installation, while compliance with the RoHS Directive ensures its environmental friendliness. The V47ZS1P is an ideal protector for a variety of applications, including medical devices, power supplies, and automotive circuits.

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