1210L300SLWR

Ptc Resettable Fuses Overview

The Littelfuse 1210L300SLWR is a surface-mount polymer PTC resettable fuse from the Low Rho series. It features a 6 VDC maximum voltage rating and a 3.5 A hold current. The device trips at 7 A and withstands up to 50 A fault current. Initial resistance is 18 mOhms, with a maximum post-trip resistance of 20 mOhms. Dimensions are 3.43 mm x 2.8 mm x 1 mm in a 1210 package. Operating temperature range is -40°C to +85°C.

Ptc Resettable Fuses Feature Summary

• Low on-resistance design for minimal power loss
• Automatic reset functionality after fault clearance
• Compact surface-mount construction for space-constrained PCBs

Ptc Resettable Fuses Applications

• Portable electronics protection
• Battery pack overcurrent safeguarding
• USB port circuit protection

Ptc Resettable Fuses Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified suppliers. Request official datasheets and RoHS compliance documentation to confirm material specifications. Ensure storage conditions maintain moisture sensitivity level integrity prior to soldering. Validate part markings against manufacturer standards to prevent counterfeit integration into production lines.

Ptc Resettable Fuses Selection Notes

Select this component when low initial resistance is critical for efficiency. The 6V rating suits low-voltage digital logic and battery systems. Verify that the 3.5A hold current aligns with normal operating loads. Consider the 1210 footprint for board layout compatibility. Confirm thermal management requirements within the specified operating temperature range.

Ptc Resettable Fuses Part Context

This device belongs to the Littelfuse POLY-FUSE LoRho series, engineered for low resistance applications. It utilizes polymer positive temperature coefficient technology to provide reliable overcurrent protection. The series is designed for high-volume surface-mount assembly processes, offering consistent performance across diverse electronic environments.

Ptc Resettable Fuses Replacement Considerations

The 1210L300SLYR is a direct replacement substitute. Both parts share identical electrical ratings and physical dimensions. Verify package availability as the Y suffix indicates older packaging configurations compared to the WR variant.

Ptc Resettable Fuses FAQ

What is the maximum fault current the 1210L300SLWR can withstand?

The device can withstand a maximum fault current of 50 Amperes.

Does this component require manual replacement after tripping?

No, it is a resettable fuse that automatically returns to a low-resistance state once the fault condition is removed and the device cools down.