B59990C0120A050

Ptc Resettable Fuses Overview

The B59990C0120A050 is a ceramic PTC self-resetting fuse from the B59990 series, designed for through-hole radial disk mounting. It features a maximum rated voltage of 80V and a hold current (Ih) of 50 mA. The trip current (It) is specified at 100 mA, with a maximum fault current capacity of 700 mA. Typical resistance at 25°C is 55 Ohms. The component operates within a temperature range of -40°C to +125°C and measures 4.00mm in diameter by 3.50mm in height.

Ptc Resettable Fuses Feature Summary

• Provides overcurrent protection via positive temperature coefficient characteristics
• Self-resetting functionality eliminates the need for manual replacement after fault clearance
• Radial leaded disk package facilitates standard through-hole PCB integration

Ptc Resettable Fuses Applications

• Overcurrent protection for low-current electronic circuits
• Secondary protection in consumer electronics assemblies
• Interface circuit safeguarding in industrial control systems

Ptc Resettable Fuses Procurement Notes

Verify that the specific part number matches the required electrical ratings, particularly the 50 mA hold current and 80 V maximum voltage. Confirm the package type corresponds to radial through-hole requirements. Ensure compliance with RoHS directives if applicable to the manufacturing process. Cross-reference the manufacturer's latest datasheet for any updates on recommended soldering profiles or storage conditions prior to procurement.

Ptc Resettable Fuses Selection Notes

Select this component when circuit protection requires a resettable device with a low hold current threshold near 50 mA. The 80 V rating suits low-voltage DC applications. Consider the 55 Ohm typical resistance for potential impact on signal integrity or power loss in sensitive lines. Evaluate the thermal environment to ensure operation remains within the -40°C to +125°C range without premature tripping or failure to reset.

Ptc Resettable Fuses Part Context

This component belongs to the B59990 series of ceramic PTC fuses manufactured by TDK Electronics, formerly EPCOS. The series offers various hold current options for different protection needs. As a passive circuit protection device, it complements TDK's broader portfolio of capacitors, inductors, and sensors used in automotive, industrial, and consumer electronics markets.

Ptc Resettable Fuses Replacement Considerations

The B59990C0120A051 is a confirmed substitute within the same series, sharing identical physical dimensions and general characteristics. Verify that the alternative part meets the specific 50 mA hold current requirement, as other variants in the series may differ significantly in electrical ratings.