72R050XU

Ptc Resettable Fuses Overview

The Littelfuse 72R050XU is a PolySwitch resettable PTC fuse rated for 72V maximum voltage and 500mA hold current. It features a radial leaded package with a 5.1mm lead spacing, designed for through-hole PCB mounting. The device trips at 1A and supports a maximum fault current of 40A. Initial resistance is typically 1.17 Ohms, rising to a maximum of 1.17 Ohms after tripping. It operates within a temperature range of -40°C to +85°C and carries cURus and TUV certifications.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection for circuits, wiring harnesses, and PCB components
• Automatically resets to low resistance state after fault conditions are cleared
• Offers high insulation resistance and low contact resistance for stable performance

Ptc Resettable Fuses Applications

• Protection of actuators, screens, and small motors in commercial vehicles
• Circuit protection for passenger automotive electronics
• Overcurrent safeguarding for battery-powered devices and rechargeable batteries

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'XU' against official Littelfuse documentation to confirm packaging type and compliance status. Ensure the selected variant matches the required radial lead configuration and voltage rating for the target application circuit. Cross-reference the manufacturer part number with authorized distributors to confirm availability and authenticity prior to ordering.

Ptc Resettable Fuses Selection Notes

Select this component when a 72VDC system requires a resettable fuse with a 500mA continuous current capacity. The radial lead form factor is suitable for through-hole assembly where surface-mount options are not feasible. Consider the trip current of 1A and maximum fault current of 40A to ensure adequate protection margins for the protected load.

Ptc Resettable Fuses Part Context

This part belongs to the 72R series of PolySwitch resettable fuses from Littelfuse. The series is engineered for automotive and general electronic applications requiring robust overcurrent protection. The 72R designation indicates a 72V maximum voltage rating, distinguishing it from lower-voltage variants like the 60R series.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other 72V, 500mA radial PTC fuses from Littelfuse such as the 72R050XF or 72R050XP, provided the lead spacing and package dimensions are compatible with the existing PCB footprint.