The RF2519-000 is a resettable fuse, also known as a Polymer Positive Temperature Coefficient (PPTC) device, manufactured by Littelfuse Inc. It is designed to protect electronic circuits from overcurrent conditions by limiting the current flow during a fault. Once the fault is cleared and power is removed, the device resets automatically, restoring the circuit to normal operation.

Applications

• USB ports: Protects USB ports from overcurrent faults caused by short circuits or excessive current draw.
• Power supplies: Used in power supplies to protect against overcurrent conditions.
• Battery packs: Protects battery packs from overcurrent and short circuits.
• Automotive electronics: Employed in automotive electronics to protect various circuits from overcurrent.
• Consumer electronics: Utilized in a wide range of consumer electronics devices for circuit protection.

Features

• Resettable: Automatically resets after the overcurrent condition is removed, eliminating the need for manual replacement.
• Surface mount technology (SMT): Designed for surface mount assembly, enabling high-density board layouts.
• Fast trip time: Provides fast tripping in response to overcurrent conditions.
• Low resistance: Offers low resistance during normal operation, minimizing power dissipation.
• Compact size: Available in a compact package, saving board space.

Benefits

• Improved circuit protection: Protects electronic circuits from damage due to overcurrent conditions.
• Reduced downtime: Automatically resets after a fault, minimizing downtime.
• Cost-effective solution: Eliminates the need for replacing fuses, reducing maintenance costs.
• Enhanced safety: Prevents overheating and potential fire hazards caused by overcurrent.
• Simplified design: Easy to integrate into existing circuits.

Additional Details

The RF2519-000 typically has a hold current rating of around 0.5A to 2A, and a trip current rating that is higher than the hold current. The trip time depends on the magnitude of the overcurrent. The voltage rating is typically in the range of a few volts to tens of volts. The operating temperature range is typically from -40°C to +85°C. Detailed specifications, such as the exact hold current, trip current, and trip time, can be found in the datasheet. The device is RoHS compliant.