1812L050PR

Ptc Resettable Fuses Overview

The Littelfuse 1812L050PR is a surface-mount polymer PTC resettable fuse from the 1812L series. It features a maximum operating voltage of 15V DC and a hold current (Ih) of 500 mA. The trip current (It) is specified at 1 A, with a typical trip time of 0.15 s. The device has a minimum initial resistance of 0.15 Ω and a maximum post-trip resistance of 1 Ω. It supports a maximum fault current of 100 A and operates within a temperature range of -40°C to +85°C. The component measures 4.73 mm in length, 3.41 mm in width, and 0.75 mm in height.

Ptc Resettable Fuses Feature Summary

• Self-resetting protection mechanism utilizing polymer positive temperature coefficient technology
• Surface mount construction designed for automated PCB assembly processes
• Halogen-free composition compliant with environmental standards

Ptc Resettable Fuses Applications

• Portable electronic devices requiring overcurrent protection
• Peripheral interface circuits such as USB and data lines
• Battery pack protection systems

Ptc Resettable Fuses Procurement Notes

Verify that the ordered part number matches the specific suffix 'PR' to ensure correct packaging configuration. Confirm that the application voltage does not exceed the 15V DC rating. Ensure thermal management accounts for the specified operating temperature range during normal operation.

Ptc Resettable Fuses Selection Notes

Select this component when circuit design requires a low-profile surface mount solution with a 500 mA hold current. Verify that the expected operating current remains below the hold current threshold to prevent nuisance tripping. Check that the peak transient currents do not exceed the 100 A maximum fault current rating.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse 1812L series of resettable fuses. The series offers various hold current options within the standard 1812 package footprint. These components are engineered for compact consumer electronics and industrial applications where space constraints and reliable circuit protection are critical requirements.

Ptc Resettable Fuses Replacement Considerations

Equivalent parts include 1812L050 and F2150TR. Verify that substitute components maintain identical voltage ratings, hold current specifications, and physical dimensions to ensure compatibility with existing PCB layouts and thermal profiles.