TCF250-145-RB-B-0.5

Ptc Resettable Fuses Overview

The TCF250-145-RB-B-0.5 is a surface-mount PolySwitch resettable fuse from Littelfuse, designed for circuit protection in compact electronics. It features a hold current of 145 mA and a trip current of 290 mA, ensuring reliable overcurrent detection. The device supports a maximum voltage of 60 VDC and handles a maximum rated current of 3 A. With a low initial resistance of approximately 3 to 6 ohms, it minimizes power loss during normal operation. The component operates within a temperature range of -40°C to +85°C and utilizes a radial-style SMD package with a 5 mm lead spacing, suitable for automated PCB assembly.

Ptc Resettable Fuses Feature Summary

• Provides automatic resettable overcurrent protection for sensitive electronic circuits
• Features fast time-to-trip response to limit damage during fault conditions
• Offers low parasitic capacitance and flat impedance characteristics for signal integrity

Ptc Resettable Fuses Applications

• LED assembly protection
• Telecom equipment circuit safeguarding
• Portable consumer electronics overcurrent defense

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix RB-B-0.5 against official Littelfuse documentation to confirm surface-mount configuration and tape-and-reel packaging details. Ensure the selected variant matches the required 145 mA hold current and 60 VDC rating for your specific application design. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability of the PTC resettable fuse components.

Ptc Resettable Fuses Selection Notes

Select this model when space-constrained designs require surface-mount overcurrent protection with precise 145 mA holding capabilities. The 60 VDC rating suits low-voltage digital and communication interfaces. Consider the 3 to 6 ohm resistance range for power dissipation calculations. Verify thermal derating requirements if operating near the upper 85°C temperature limit or in enclosed PCB layouts.

Ptc Resettable Fuses Part Context

This component belongs to the TRF/TCF250 series of PolySwitch resettable fuses, which are engineered for high-reliability circuit protection. The series is widely used in telecommunications and line-rated applications due to its consistent performance and fast tripping characteristics. The TCF variant specifically denotes the surface-mount form factor, distinguishing it from through-hole versions while maintaining identical electrical protection parameters.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other Littelfuse TCF250 series devices with matching 145 mA hold current ratings. Verify that alternative surface-mount packages maintain compatible footprint dimensions and thermal properties. Ensure replacement parts meet the same 60 VDC maximum voltage and 3 A maximum current specifications to preserve circuit safety standards.