1206L450SLWR

Ptc Resettable Fuses Overview

The Littelfuse 1206L450SLWR is a surface-mount PolySwitch resettable PPTC device from the Low Rho series. It features a 1206 (3225 metric) package with a hold current of 4.5 A and a trip current of 9 A. The component supports a maximum voltage of 6 VDC and offers a fault current rating up to 50 A. Its low resistance of 14 mohms minimizes power loss, while the operating temperature range spans -40°C to +85°C.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for sensitive circuits by raising resistance during thermal events
• Low resistance design minimizes power dissipation in high-current applications
• Compact surface-mount form factor suitable for space-constrained PCB layouts

Ptc Resettable Fuses Applications

• Portable electronics and handheld devices
• Battery packs and rechargeable battery protection
• Data communication and networking equipment
• Automotive electronics and infotainment systems

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'WR' against official Littelfuse documentation to confirm reel packaging specifications. Ensure the selected variant matches the required 6VDC rating and 1206 footprint. Cross-reference the datasheet for precise mechanical dimensions and soldering profile recommendations before integration.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection requires a low-resistance resettable fuse in a compact SMD package. The 4.5A hold current suits moderate load applications, while the 6VDC rating limits usage to low-voltage DC systems. Evaluate thermal management requirements given the -40°C to +85°C operational range.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse Low Rho PolySwitch series, designed for high-efficiency overcurrent protection. The 1206L series utilizes polymer technology to provide resettable functionality, replacing traditional fuses in applications requiring frequent fault recovery without manual intervention.

Ptc Resettable Fuses Replacement Considerations

Compatible substitutes include other 1206 package PolySwitch devices with matching 4.5A hold current and 6VDC ratings. Verify equivalent trip characteristics and resistance values to ensure circuit performance remains unchanged during replacement.