B59940C0120A070

Ptc Resettable Fuses Overview

The B59940C0120A070 is a ceramic PTC resettable fuse from the TDK EPCOS B59940 series, designed for overcurrent protection in electronic circuits. It features a maximum operating voltage of 80V and a hold current (Ih) of 450 mA. The device trips at a current of 900 mA and can withstand a maximum fault current of 8 A. At 25°C, the typical resistance is 2.3 Ohms. It utilizes a radial, disc-style through-hole package with a lead spacing of 5.00 mm. The component operates within a temperature range of -40°C to 125°C and carries UR certification.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault conditions clear, eliminating the need for manual replacement.

Ptc Resettable Fuses Applications

• Overcurrent protection for low-voltage DC circuits
• Short circuit protection in consumer electronics
• Battery pack protection systems

Ptc Resettable Fuses Procurement Notes

Verify that the specified 80V rating and 450 mA hold current align with the target circuit's operational parameters. Confirm compatibility with the radial through-hole mounting style and 5.00 mm lead spacing. Ensure the application environment remains within the -40°C to 125°C operating temperature range to maintain performance integrity.

Ptc Resettable Fuses Selection Notes

Select this component when an 80V maximum voltage and 450 mA continuous current capacity are required. The 2.3 Ohm initial resistance and 900 mA trip point define the protection threshold. Consider the radial disc form factor for PCB layouts requiring specific lead spacing and mechanical height constraints.

Ptc Resettable Fuses Part Context

This part belongs to the B59940 series of coated leaded disk PTC thermistors manufactured by TDK Electronics. These components are engineered for general-purpose overcurrent protection in applications where space is limited but reliable thermal switching is necessary. The series offers various current ratings within a standardized physical footprint.

Ptc Resettable Fuses Replacement Considerations

Cross-reference with other B59940 series variants if different current ratings are needed. Verify that any substitute maintains the same 80V voltage rating and radial package dimensions to ensure mechanical and electrical compatibility.