0805L020YR

Overview

The Littelfuse 0805L020YR is a PolySwitch resettable PTC device in the 0805L series, designed for surface mount applications. It features a hold current of 20 mA and a trip current of 60 mA, with a maximum voltage rating of 63 VDC. The component has a typical resistance of 70 Ohms and can withstand a maximum rated current of 40 A. Packaged in an 0805 (2012 metric) SMD form factor measuring 2.1 mm in length, 1.35 mm in width, and 1 mm in height, it dissipates up to 500 mW. This self-recovery fuse provides overcurrent protection for electronic circuits.

Feature Summary

• Provides automatic circuit recovery after fault clearance without manual replacement
• Surface mount construction compatible with standard reflow soldering processes
• Polymer positive temperature coefficient technology ensures stable performance

Applications

• Overcurrent protection for portable electronics and handheld devices
• Circuit safeguarding in telecommunications equipment and data lines
• Protection for battery packs and power supply inputs in consumer appliances

Procurement Notes

Verify the specific suffix YR against the official Littelfuse datasheet to confirm package type and tape/reel specifications. Ensure the selected variant matches the required hold and trip currents for the target application. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and compliance with RoHS standards before finalizing procurement orders.

Selection Notes

Select this component based on the 20 mA hold current requirement and 63 VDC maximum voltage rating. Consider the 0805 footprint constraints and the 70 Ohm initial resistance when designing the PCB layout. Evaluate the thermal environment to ensure the 500 mW power dissipation rating remains within safe operating limits during normal operation and fault conditions.

Part Context

This device belongs to the Littelfuse 0805L series of PolySwitch resettable fuses. These components are widely used in the electronics industry for protecting low-voltage circuits from overcurrent damage. The series offers various hold current options within a compact surface mount package, providing a reliable alternative to traditional one-time fuses in modern electronic designs.

Replacement Considerations

• 0805L020HR
• 0805L020DR

FAQ

What is the maximum voltage rating for the 0805L020YR?

The maximum voltage rating is 63 VDC.

Does the 0805L020YR require manual replacement after tripping?

No, it is a resettable device that automatically recovers once the fault condition is removed and the component cools down.