The R4513.15 is a resettable fuse produced by Littelfuse Inc. designed to safeguard electronic circuits from overcurrent conditions. This Polymer Positive Temperature Coefficient (PPTC) device automatically resets after the fault condition is removed, offering a reliable alternative to traditional, single-use fuses. The '3.15' likely represents a current rating, potentially 3.15 Amperes.

Applications

• Power Supplies: Used in various power supply applications to protect against overloads and short circuits.
• Consumer Electronics: Found in devices such as TVs, DVD players, and audio equipment to protect internal circuitry.
• Battery Chargers: Protects battery charging circuits from excessive current flow.
• Automotive Electronics: Safeguards electronic components in automotive systems.
• Industrial Control Systems: Provides overcurrent protection in industrial automation and control equipment.

Features

• Resettable Functionality: Automatically resets after the overcurrent fault is cleared, eliminating the need for manual fuse replacement.
• Solid-State Construction: Offers enhanced reliability and durability.
• Fast Trip Time: Quickly responds to overcurrent events, limiting the amount of time the circuit is exposed to excessive current.
• Low Resistance: Provides minimal resistance during normal operation, reducing power loss.
• Compact Size: Enables easy integration into space-constrained electronic designs.

Benefits

• Enhanced Circuit Protection: Prevents damage to electronic components from excessive current.
• Reduced Downtime: Minimizes downtime by automatically resetting after a fault condition.
• Improved Reliability: Solid-state construction ensures long-term reliable performance.
• Cost Savings: Reduces the overall cost of ownership by eliminating the need to purchase and replace traditional fuses.
• Increased Safety: Protects against potential fire hazards and equipment damage caused by overcurrent events.

Technical Specifications

For complete technical specifications regarding the R4513.15, including its hold current, trip current, voltage rating, and operating temperature range, please consult the official Littelfuse datasheet. PPTC resettable fuses like the R4513.15 are constructed from a polymeric material that exhibits a positive temperature coefficient of resistance. When an overcurrent event occurs, the device heats up, causing a rapid increase in resistance. This increase in resistance limits the current flow, protecting the circuit. Once the overcurrent condition is removed, the device cools down and its resistance returns to a low value, allowing normal circuit operation to resume.