1206L450/12SLWR

Ptc Resettable Fuses Overview

The Littelfuse Inc. 1206L450/12SLWR is a polymer PTC self-recovery fuse designed for surface mount applications in the 1206 (3216 metric) package. It features a maximum holding current of 4.5 A and a maximum voltage rating of 12 V. The device exhibits an initial resistance minimum of 10 mOhms and a post-trip resistance maximum of 80 mOhms. With a trip time of 300 ms and a maximum trip current of 9 A, it provides overcurrent protection within an operating temperature range of -40°C to +85°C.

Ptc Resettable Fuses Feature Summary

• Polymer positive temperature coefficient technology enables automatic circuit recovery after fault clearance without manual replacement.
• Low resistance construction minimizes power loss and heat generation during normal operation.
• Surface mount design facilitates automated assembly and space-efficient PCB integration.

Ptc Resettable Fuses Applications

• Portable electronic devices requiring compact overcurrent protection
• Battery-powered equipment circuits
• Communication modules and networking hardware

Ptc Resettable Fuses Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified supply chain partners. Confirm RoHS 3 compliance status and check for specific manufacturing date codes relevant to your production timeline. Ensure storage conditions adhere to moisture sensitivity level requirements to maintain solderability and electrical performance upon installation.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable protection mechanism is preferred over traditional fuses to reduce maintenance costs. Ensure the circuit's normal operating current remains below the 4.5 A holding current threshold. Verify that the peak fault current does not exceed the 50 A maximum interrupting rating to prevent device failure.

Ptc Resettable Fuses Part Context

This part belongs to the POLY-FUSE LoRho series, which specializes in low-resistance surface mount PTC devices. The series is engineered for high-current applications where minimal voltage drop and thermal impact are critical. It complements other Littelfuse circuit protection solutions by offering reusable safety for sensitive electronics.

Ptc Resettable Fuses Replacement Considerations

Direct substitute: 1206L450/12SLYR. Verify package compatibility and electrical parameter alignment before implementation.

Ptc Resettable Fuses FAQ

What is the maximum fault current the 1206L450/12SLWR can withstand?

The device has a maximum fault current rating of 50 A.

Does the 1206L450/12SLWR require manual resetting after a trip event?

No, it is a self-recovery fuse that automatically resets once the fault condition is removed and the device cools down.