TCF250-120T-RB-B-0.5

Ptc Resettable Fuses Overview

The TCF250-120T-RB-B-0.5 is a PolySwitch resettable PTC fuse from Littelfuse, designed for overcurrent protection in telecom and line-rated applications. It features a hold current of 120 mA and a trip current of 240 mA, with a maximum voltage rating of 60 VDC. The device has a maximum fault current capacity of 3 A and an initial resistance of 16 Ohms. Operating within a temperature range of -40°C to +85°C, it utilizes a surface-mount radial-leaded package with dimensions of 5.5 mm length, 5.5 mm width, and 2.5 mm height.

Ptc Resettable Fuses Feature Summary

• Provides fast time-to-trip response for overcurrent protection
• Supports surface-mount, radial-leaded, and chip form factors
• Complies with RoHS standards for environmental safety

Ptc Resettable Fuses Applications

• Telecom equipment protection
• Line-rated circuit protection
• Consumer electronics overcurrent safeguarding

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix RB indicates the non-solderable chip device configuration as documented in official Littelfuse datasheets. Confirm that the component meets the required agency recognition standards for your target application. Ensure compatibility with surface-mount assembly processes given the radial-leaded design. Cross-reference the part number against the latest manufacturer documentation to confirm availability and compliance status before procurement.

Ptc Resettable Fuses Selection Notes

Select this component when a compact, surface-mount resettable fuse is required for low-voltage DC circuits. The 120 mA hold current suits sensitive signal lines or low-power data interfaces. Consider the 60 VDC rating for appropriate voltage margin. The radial-leaded SMD format facilitates automated placement while maintaining robust mechanical attachment compared to standard chip packages.

Ptc Resettable Fuses Part Context

This part belongs to the TCF250 series, which specializes in Polymeric PTC resettable fuses for telecom and line-rated environments. The series offers various form factors including surface-mount and radial-leaded options. The TCF250 series is characterized by its fast tripping capabilities and compliance with industry standards for electronic protection devices.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes within the same series include TCF250-120T-B-0.5 and TCF250-120T-RA-B-0.5. Verify package compatibility and electrical parameters such as hold and trip currents when considering alternatives. Ensure the replacement maintains the required voltage and current ratings for the specific circuit application.