The SMD1206P110TFT is a PolySwitch resettable fuse manufactured by Littelfuse Inc. It provides overcurrent protection for various electronic circuits, especially those that require a compact surface mount solution. This device is designed to automatically reset after the fault condition is cleared, ensuring continuous operation without the need for manual intervention.

Applications

• Wearable Electronics: Protection for smartwatches, fitness trackers, and other wearables.
• Mobile Computing Devices: Overcurrent protection in tablets and laptops.
• Portable Medical Devices: Ensuring safety and reliability in medical equipment.
• Point-of-Sale (POS) Equipment: Protecting POS terminals from electrical faults.
• Automotive Electronics: Circuit protection in automotive applications.

Features

• Surface Mount Design: Enables efficient PCB assembly.
• 1206 Package Size: Small footprint for space-constrained applications.
• Resettable Functionality: Eliminates the need for fuse replacement.
• Fast Trip Time: Quickly responds to overcurrent events.
• Low Resistance: Minimizes voltage drop during normal operation.
• RoHS Compliance: Environmentally friendly due to the absence of hazardous substances.

Benefits

• Enhanced Circuit Protection: Prevents damage to sensitive components.
• Increased Product Lifespan: Extends the operational life of the electronic device.
• Reduced Maintenance Costs: Eliminates the need for frequent fuse replacements.
• Improved System Reliability: Ensures continuous operation even after a fault.
• Compact Design: Allows for smaller and more portable electronic devices.

Additional Details

The SMD1206P110TFT has a hold current (Ih) of 1.1 A and a trip current (It) of 2.2 A. It features a maximum voltage rating of 6 VDC, with a maximum interrupt current of 40 A. The operating temperature range is -40°C to +85°C. The device's resettable functionality is achieved through a polymeric positive temperature coefficient (PPTC) material that increases its resistance significantly when an overcurrent event occurs, limiting the current flow and protecting the circuit. Once the fault is removed and the device cools down, it returns to its low resistance state, allowing normal operation to resume.