YM120D125N450

Ptc Resettable Fuses Overview

The YM120D125N450 is a ceramic PTC resettable fuse manufactured by Amphenol Advanced Sensors (Thermometrics). It features a radial through-hole disc package with dimensions of 7.00mm diameter, 4.50mm thickness, and 9.50mm height. The component provides overcurrent protection with a maximum voltage rating of 265V and a hold current (Ih) of 110 mA. At 25°C, the resistance value is 45 Ohms with a tolerance of ±20%. This device functions as a self-recovering fuse to safeguard electronic circuits against excessive current conditions.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault clearance without manual replacement
• Utilizes positive temperature coefficient ceramic material for stable thermal response
• Designed for radial through-hole mounting in compact electronic assemblies

Ptc Resettable Fuses Applications

• Overcurrent protection in consumer electronics power supplies
• Circuit safeguarding in industrial control systems
• Protection within automotive electrical subsystems

Ptc Resettable Fuses Procurement Notes

Verify the specific hold current and trip characteristics against application requirements before integration. Confirm that the radial lead configuration matches the target PCB layout. Ensure the voltage rating meets or exceeds the maximum circuit potential. Check compliance with relevant safety standards if required for the end product. Validate thermal dissipation capabilities within the final enclosure design.

Ptc Resettable Fuses Selection Notes

Select this component when a self-resetting protection mechanism is preferred over traditional fuses. Consider the 110 mA hold current limit to ensure normal operation does not trigger tripping. Evaluate the 265V rating against peak line voltages. Assess the physical dimensions for space constraints. Compare thermal performance requirements with alternative PTC devices in the Thermometrics portfolio.

Ptc Resettable Fuses Part Context

This part belongs to the YM series of thermistors from Amphenol Advanced Sensors. The series focuses on positive temperature coefficient applications requiring robust overcurrent protection. The manufacturer specializes in sensing and protection solutions for diverse industries including automotive and industrial automation. This specific model represents a standard radial disc form factor commonly used in general-purpose circuit protection.

Ptc Resettable Fuses Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.