BK250-120-SY

Ptc Resettable Fuses Overview

The YAGEO BK250-120-SY is a square-shaped, surface-mount polymer PTC resettable fuse designed for overcurrent protection. It features a hold current of 120 mA and a trip current of 240 mA, with a maximum voltage rating of 250 VDC. The component has a maximum rated current of 10 A and an initial resistance of 3.5 Ohms. It operates within a temperature range of -40°C to +85°C and utilizes a radial termination style suitable for PCB mounting.

Ptc Resettable Fuses Feature Summary

• Provides automatic self-resetting overcurrent protection via positive temperature coefficient polymer technology
• Features low on-state resistance to minimize power loss during normal operation
• Designed for surface-mount installation with a compact square form factor

Ptc Resettable Fuses Applications

• Overcurrent protection in portable electronic devices
• Circuit protection for automotive electronics
• Guarding communication equipment interfaces

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'SY' against official YAGEO documentation to confirm package dimensions and tape-and-reel specifications. Ensure the selected variant matches the required hold current and voltage ratings for the target application circuit. Cross-reference the manufacturer part number with authorized distributors to confirm authenticity and compliance with RoHS standards.

Ptc Resettable Fuses Selection Notes

Select this component based on the required 120 mA hold current and 250 VDC maximum voltage rating. Consider the thermal environment, as the trip characteristics are influenced by ambient temperature. Verify that the surface-mount footprint aligns with the PCB design constraints and that the reflow soldering profile meets the component's thermal limits.

Ptc Resettable Fuses Part Context

This device belongs to the BK250 series of resettable fuses from YAGEO. The series offers various hold currents and package styles, including square SMD and radial leaded options. These components serve as reusable alternatives to traditional one-time fuses, providing reliable circuit protection in consumer, industrial, and automotive applications.