72R110XMR

Ptc Resettable Fuses Overview

The Littelfuse 72R110XMR is a PolySwitch resettable PTC device designed for overcurrent protection. It features a holding current of 1.1 A and a trip current of 2.2 A, with a maximum voltage rating of 72 VDC. The component has a maximum resistance of 380 mOhms and a power dissipation of 1.5 W. It supports a maximum fault current of 40 A and operates within a temperature range of -40°C to +85°C. Physical dimensions include a diameter of 13 mm and a length of 3.1 mm, with a lead spacing of 5.1 mm.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising resistance as it heats to limit current flow.
• Offers automatic reset functionality after the fault condition is removed and the device cools down.
• Designed for PCB mounting using radial leads for secure installation.

Ptc Resettable Fuses Applications

• Protection of automotive circuits including actuators, screens, and small motors.
• Overcurrent safeguarding for telecom equipment and wiring harnesses.
• Protection for battery packs and rechargeable batteries from short circuits and overcharging.

Ptc Resettable Fuses Procurement Notes

Verify that the specific part number matches the required electrical parameters, particularly the 1.1 A holding current and 72 VDC rating. Confirm the radial lead configuration and package type align with the target PCB footprint. Ensure compliance with RoHS standards if required by the application specifications.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection requires a resettable fuse with a 1.1 A nominal current and 72 VDC maximum voltage. Consider the 380 mOhms initial resistance and 1.5 W power dissipation for thermal management. Evaluate the 40 A maximum fault current capability against potential short-circuit scenarios in the design.

Ptc Resettable Fuses Part Context

This device belongs to the 72R series of PolySwitch resettable fuses from Littelfuse. These components are solid-state devices that provide overcurrent protection without the need for replacement after tripping. The series includes various current ratings and form factors to suit different electronic protection needs.

Ptc Resettable Fuses Replacement Considerations

Substitutes must match the 1.1 A holding current, 72 VDC voltage rating, and radial leaded package. Verify equivalent trip current and resistance values to ensure identical circuit behavior during fault conditions.

Ptc Resettable Fuses FAQ

What is the mechanism by which the 72R110XMR limits current?

The device raises its internal resistance as it heats up due to excessive current flow, thereby limiting the current to a safe level until the fault is removed and the device cools down.

Does the 72R110XMR require replacement after a fault event?

No, it is a resettable fuse that automatically returns to its low-resistance state once the overcurrent condition is cleared and the component cools to normal operating temperatures.