B59945C0120A070

Ptc Resettable Fuses Overview

The B59945C0120A070 is a ceramic PTC self-resetting fuse from the TDK B59945 series, designed for overcurrent protection in electronic circuits. It features a radial through-hole package with disc dimensions of 17.50mm diameter and 3.50mm height. The component operates within a temperature range of -40°C to 85°C and holds AEC-Q200 automotive qualification. Key electrical parameters include a maximum rated voltage of 30V, a hold current (Ih) of 1.3A, a trip current (It) of 2.6A, and a maximum fault current of 8A. The resistance at 25°C is typically 450 mOhms with a lead spacing of 5.00mm.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault clearance without manual replacement
• Meets AEC-Q200 automotive grade reliability standards for harsh environments
• Utilizes lead-free terminals compliant with environmental regulations

Ptc Resettable Fuses Applications

• Overcurrent protection in automotive electronic systems
• Short circuit protection for low-voltage DC circuits
• Protection of sensitive components in industrial control units

Ptc Resettable Fuses Procurement Notes

Verify that the specific part number matches the required electrical ratings, particularly the 30V maximum voltage and 1.3A hold current, to ensure compatibility with the target circuit design. Confirm compliance with RoHS3 and REACH standards if environmental regulations apply to the final assembly. Check for any recent product change notices regarding packaging or material composition updates from the manufacturer.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable fuse is required for circuits operating up to 30V with a steady-state current near 1.3A. The radial disk form factor suits applications requiring robust mechanical mounting via through-hole technology. Ensure the ambient temperature does not exceed 85°C to maintain performance integrity, as higher temperatures may reduce the effective hold current capacity.

Ptc Resettable Fuses Part Context

This device belongs to the TDK B599*5 series of PTC thermistors, specifically engineered for overcurrent protection. The series offers various rated currents and voltage levels, with the B59945 variant focusing on lower voltage applications. These components are widely used in consumer electronics, industrial equipment, and automotive sectors where reliable, reusable protection against current surges is essential.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes within the same series include other B59945 variants with different current ratings, such as B59945C0100A070 or B59945C0150A070, provided the electrical specifications align with the application requirements. Cross-series replacements require careful verification of voltage, current, and physical dimensions.