The R459.250 is a resettable fuse manufactured by Littelfuse Inc. It is designed to protect electronic circuits from overcurrent conditions. These PolySwitch PPTC (polymeric positive temperature coefficient) devices offer a reliable and effective way to safeguard against damage caused by excessive current flow. They are commonly used in a wide variety of applications to enhance the safety and longevity of electronic products.

Applications

• Overcurrent protection in power supplies
• Protection of sensitive electronic components
• USB port protection
• Automotive electronics
• Battery packs

Features

• Resettable: Automatically resets after the overcurrent condition is removed.
• Solid State: Provides reliable overcurrent protection without the need for replacement.
• Compact Size: Allows for easy integration into various circuit designs.
• Fast Trip Time: Quickly responds to overcurrent events, minimizing potential damage.
• Low Resistance: Minimizes voltage drop during normal operation.

Benefits

• Improved Product Reliability: Protects against damage from overcurrent events, extending product lifespan.
• Reduced Warranty Costs: Minimizes the risk of product failure due to overcurrent conditions.
• Enhanced Safety: Prevents overheating and potential fire hazards.
• Cost-Effective: Eliminates the need for fuse replacement, reducing maintenance costs.
• Simplified Design: Easy to incorporate into new and existing circuit designs.

Additional Details

The R459.250 has a holding current of 0.25A (250mA) and is designed to trip quickly when the current exceeds a certain threshold. The voltage rating is typically around 60V. The operating temperature range is from -40°C to +85°C, making it suitable for a wide range of environments. These devices are RoHS compliant, meaning they are free from hazardous substances. It is crucial to consult the Littelfuse datasheet for specific electrical characteristics, tripping times, and temperature derating curves for proper application and performance.