CMF-SD25-2

Ptc Resettable Fuses Overview

The Bourns CMF-SD25-2 is a ceramic PTC (Polymeric Positive Temperature Coefficient) resettable fuse from the CMF-SDP series, designed for surface-mount PCB applications. It functions as a self-recovering overcurrent protection device with a holding current of 130 mA and a trip current of 260 mA. The component supports a maximum voltage of 230 VAC and features a resistance of 25 ohms. It is rated for a maximum current of 2.8 A and operates within a temperature range of -40°C to +125°C.

Ptc Resettable Fuses Feature Summary

• Self-recovering circuit protection mechanism utilizing ceramic PTC technology
• Surface-mount design optimized for automated PCB assembly processes
• High resistance value configuration for specific circuit isolation requirements

Ptc Resettable Fuses Applications

• Overcurrent protection in industrial control systems
• Surge protection for exposed DC power supplies
• Circuit safeguarding in telecommunications equipment

Ptc Resettable Fuses Procurement Notes

Verify exact availability through authorized distributors as regional stock may vary. Confirm RoHS compliance and REACH SVHC status prior to integration. Ensure the specified SMD package matches your board layout constraints. Validate thermal derating curves against your operating environment to guarantee reliable performance under continuous load conditions.

Ptc Resettable Fuses Selection Notes

Select this component when a high-resistance PTC fuse is required for surface-mount designs. The 25-ohm initial resistance distinguishes it from standard low-resistance resettable fuses. Ensure the 130 mA holding current aligns with your normal operating current to prevent nuisance tripping. Verify that the 230 VAC rating exceeds your system's peak voltage requirements.

Ptc Resettable Fuses Part Context

This part belongs to the Bourns CMF-SDP series of ceramic PTC devices. These components are engineered for robust environmental stability and are commonly utilized in conjunction with other surge protection elements like gas discharge tubes or varistors. The series provides a compact solution for protecting sensitive electronics against transient overcurrent events.

Ptc Resettable Fuses Replacement Considerations

Consult official Bourns documentation for direct cross-reference substitutes. Generic PTC fuses may not match the specific 25-ohm resistance or ceramic material properties. Verify that any replacement maintains the same SMD footprint and thermal characteristics.