The R460.750 is a resettable fuse manufactured by Littelfuse Inc. This PolySwitch PPTC (polymeric positive temperature coefficient) device is specifically designed to protect electronic circuits from damage caused by overcurrent and short circuit conditions. When the current exceeds the device's specified holding current, its resistance increases dramatically, limiting the current flow and protecting downstream components. Once the fault condition is removed, the device cools down and automatically resets to its low-resistance state, restoring normal circuit operation.

Applications

• Power over Ethernet (PoE) Devices
• Security Systems
• Industrial Control Equipment
• Medical Devices
• Telecommunications Equipment

Features

• Resettable Functionality: Eliminates the need for manual fuse replacement.
• Solid State Construction: Provides reliable and consistent performance.
• Fast Response Time: Quickly reacts to overcurrent events.
• Compact Footprint: Saves valuable board space.
• Agency Approvals: Meets industry safety standards.

Benefits

• Increased Product Uptime: Reduces downtime due to overcurrent faults.
• Lower Maintenance Costs: Eliminates the cost of replacing blown fuses.
• Improved Product Safety: Prevents overheating and potential fire hazards.
• Enhanced Circuit Protection: Safeguards sensitive electronic components from damage.
• Simplified Troubleshooting: Resettable functionality simplifies fault diagnosis.

Additional Details

The R460.750 has a holding current of 0.75A (750mA). The trip current and voltage ratings are crucial parameters that need to be considered based on the specific application requirements. The operating temperature range is typically between -40°C and +85°C. Refer to the Littelfuse datasheet for detailed specifications, including trip time curves, temperature derating information, and agency approvals. These PPTC devices utilize a polymer composite material that exhibits a significant increase in resistance as its temperature rises due to excessive current flow. This self-regulating behavior protects the circuit from damage and allows for automatic reset upon fault removal.