The R271002M1-2A is a radial leaded PTC (Positive Temperature Coefficient) resettable fuse manufactured by Littelfuse. It protects electronic circuits by increasing its resistance sharply when an overcurrent situation occurs. This limits current flow and helps prevent damage to sensitive components.

Applications:

• Overcurrent protection in power supplies.
• Protection of USB ports.
• Speaker protection.
• General electronic device protection.
• Automotive applications (low voltage systems).

Features:

• Resettable Functionality: Returns to its low-resistance state once the overcurrent condition is resolved and the device cools down.
• Radial Leaded Package: Designed for easy PCB mounting.
• Compact Design: Allows for use in space-constrained applications.
• Fast Trip Time: Responds quickly to overcurrent events.
• Low Resistance During Normal Operation: Minimizes impact on circuit performance.
• Agency Approvals: Meets UL, CSA, and TUV safety standards.

Benefits:

• Enhanced Circuit Safety: Shields electronic components from damage due to overcurrent.
• Reduced Downtime: Eliminates the need for fuse replacement, saving time and costs.
• Improved Reliability: Offers consistent and reliable overcurrent protection.
• Cost-Effective Solution: A cheaper alternative than replacing traditional fuses.
• Regulatory Compliance: Ensures that the device meets safety standards, ensuring regulatory compliance.

Technical Specifications:

Detailed electrical specifications, such as hold current, trip current, and maximum voltage/current ratings, should be obtained from the Littelfuse datasheet for the R271002M1-2A. Key parameters typically include:

• Hold Current (Ih): Maximum current the device can handle without tripping at a given ambient temperature.
• Trip Current (It): Minimum current needed to trigger the device to trip at a specified ambient temperature.
• Maximum Voltage (Vmax): The maximum voltage the device can withstand after tripping.
• Maximum Current (Imax): The maximum fault current the device can interrupt.
• Trip Time: Time required for the device to trip when an overcurrent is detected.
• Operating Temperature Range: The allowable range of ambient temperatures for device operation.

It is important to consult the Littelfuse datasheet for the R271002M1-2A for accurate specifications and application guidelines. Proper selection and application of the PTC fuse are vital for effective circuit protection and the prevention of equipment damage.