The RF4563-000 is a resettable fuse, also known as a Polymer Positive Temperature Coefficient (PPTC) device, manufactured by Littelfuse. It's designed to protect electronic circuits from overcurrent conditions. When an overcurrent occurs, the device heats up and its resistance increases dramatically, limiting the current flow and protecting the circuit. Once the fault is removed and the device cools down, it returns to its low-resistance state, allowing normal operation to resume.

Applications:

• USB ports
• Computer peripherals
• Mobile phones
• Game consoles
• Power supplies
• Automotive electronics

Features:

• Resettable overcurrent protection
• Solid-state construction
• Fast trip time
• Low resistance
• Compact size
• RoHS compliant

Benefits:

• Provides reliable overcurrent protection without the need for replacement.
• Offers a maintenance-free solution compared to traditional fuses.
• Responds quickly to overcurrent events, minimizing damage to sensitive components.
• Minimizes voltage drop during normal operation due to its low resistance.
• Saves space on printed circuit boards with its compact design.

Additional Details:

The RF4563-000 typically has a hold current and trip current specified in its datasheet. The hold current is the maximum current the device can carry continuously without tripping, while the trip current is the current at which the device will activate and limit the current flow. The operating voltage is also specified. The device is surface mountable and designed for automated assembly. Littelfuse provides comprehensive documentation and technical support to assist designers in selecting and implementing the appropriate PPTC device for their application.