The PTCTT84R300GTE002 is a Positive Temperature Coefficient (PTC) thermistor manufactured by Vishay. It's designed for overcurrent protection in a variety of electronic circuits. As a PTC thermistor, its resistance increases significantly as its temperature rises, providing a self-resetting protection mechanism against excessive current flow.

Applications

• Overcurrent protection in consumer electronics
• Protection of USB ports and peripherals
• Protection in battery-powered devices
• Overcurrent limiting in automotive electronics
• General circuit protection applications

Features

• Positive Temperature Coefficient (PTC) characteristics
• Resettable overcurrent protection
• Small surface-mount package
• Fast response time to overcurrent events
• Low resistance during normal operation
• RoHS compliant

Benefits

• Provides reliable overcurrent protection without the need for fuse replacement
• Reduces downtime by automatically resetting after an overcurrent event
• Saves space on the PCB due to its small size
• Quickly limits current flow to protect sensitive components
• Minimizes power loss during normal operation
• Complies with environmental regulations

Additional Details

The PTCTT84R300GTE002 operates by sensing the current flowing through it. Under normal operating conditions, its resistance is low, allowing current to flow freely. However, when an overcurrent situation occurs, the thermistor heats up, causing its resistance to increase dramatically. This increased resistance limits the current flow, protecting the circuit from damage. Once the overcurrent condition is removed, the thermistor cools down and its resistance returns to its normal low value, allowing the circuit to resume operation. The specific electrical characteristics, such as the hold current, trip current, and maximum voltage, are critical for selecting the correct PTC thermistor for a particular application. Refer to the Vishay datasheet for detailed specifications, including resistance values, temperature coefficients, and mechanical dimensions. The surface mount packaging allows for automated assembly, reducing manufacturing costs.