The R451002 is a resettable fuse from Littelfuse Inc., designed to protect electronic circuits from overcurrent conditions. These devices, also known as Polymer Positive Temperature Coefficient (PPTC) resettable fuses, offer a reliable and effective way to safeguard sensitive electronics against damage caused by excessive current flow.

Applications

• Power Supplies: Used in power supplies to protect against short circuits and overloads.
• USB Ports: Protects USB ports in computers, laptops, and other electronic devices.
• Battery Packs: Commonly found in battery packs for mobile phones, tablets, and other portable devices.
• Game Consoles: Protects the internal circuitry of game consoles.
• General Electronics: Suitable for various electronic applications requiring overcurrent protection.

Features

• Resettable: Unlike traditional fuses, PPTC devices reset automatically after the overcurrent condition is removed.
• Solid State: Operates as a solid-state device with no moving parts, enhancing reliability and longevity.
• Fast Trip Time: Quickly trips to limit current during an overcurrent event, minimizing potential damage.
• Low Resistance: Offers low resistance during normal operation, reducing power loss.
• Compact Size: Small footprint allows for easy integration into various electronic designs.

Benefits

• Overcurrent Protection: Prevents damage to electronic components from excessive current.
• Reduced Downtime: Automatically resets, minimizing downtime and maintenance.
• Enhanced Reliability: Solid-state construction ensures long-term reliability.
• Cost-Effective: Reduces the need for fuse replacements, saving time and money.
• Improved Safety: Protects against fire hazards and other potential safety issues caused by overcurrent conditions.

Technical Specifications

The specific technical specifications of the R451002, such as voltage rating, trip current, hold current, and resistance values, can vary. Refer to the Littelfuse datasheet for detailed information on these parameters to ensure proper selection for your application. The R451002 is designed to meet industry standards for safety and performance. It is typically constructed from a polymeric material that exhibits a positive temperature coefficient of resistance. This means that as the temperature of the device increases due to excessive current, its resistance rapidly increases, limiting the current flow and protecting the circuit.