The SMD050-2018-2 is a surface-mount Polymeric Positive Temperature Coefficient (PPTC) resettable fuse manufactured by Littelfuse. It provides overcurrent and short-circuit protection for electronic circuits. Under normal operating conditions, the device exhibits low resistance. However, when an overcurrent condition occurs, the PPTC heats up, causing a rapid increase in resistance that limits the current flow, protecting downstream components.

Applications

• USB Port Protection
• Portable Electronics
• Battery Chargers
• Power Cords
• Disk Drives
• Game Consoles

Features

• Surface Mount Design: Facilitates automated assembly and efficient PCB utilization.
• Resettable Functionality: Eliminates the need for manual fuse replacement; the device resets automatically upon fault removal.
• Fast Trip Time: Quickly responds to overcurrent events to minimize potential damage.
• Compact Size: Allows for use in space-constrained applications.
• Solid State Construction: Provides reliable overcurrent protection.
• RoHS Compliant: Complies with environmental regulations.

Benefits

• Protects electronic equipment from damage due to overcurrent and short circuits.
• Reduces equipment downtime and maintenance costs.
• Increases product reliability and lifespan.
• Provides a cost-effective overcurrent protection solution.
• Simplifies design and manufacturing processes.

Additional Details

The SMD050-2018-2 features a hold current of 0.5A and trips at a higher current level (consult the Littelfuse datasheet for specific trip current values). It is essential to consult the Littelfuse datasheet to obtain precise information regarding the operating voltage, trip time characteristics, and other relevant electrical parameters. The device operates by transitioning from a low-resistance state to a high-resistance state when the current exceeds the trip current threshold. Once the overcurrent condition is removed and the device cools down, it returns to its low-resistance state, allowing normal circuit operation to resume. The '2018' designation refers to the device's dimensions (20 mils x 18 mils). Typical operating temperature range: -40°C to +85°C.