CHF3020DBF500L

Overview

The CHF3020DBF500L is a current-limiting fuse manufactured by Bourns Inc., designed for surface-mount applications. It features a compact 3020 metric package size, suitable for space-constrained circuit boards. The device has a rated voltage of 32V DC and a holding current of 5.0A. It exhibits a breaking capacity of 100A at rated voltage and operates within a temperature range of -40°C to +85°C. The component utilizes a polymer PTC thermistor technology to provide resettable overcurrent protection.

Feature Summary

• Provides resettable overcurrent protection through positive temperature coefficient thermistor technology.
• Designed for surface-mount assembly to facilitate automated manufacturing processes.
• Offers reliable performance in high-temperature environments up to 85°C.

Applications

• Portable electronic devices requiring compact protection solutions
• Consumer electronics with limited board space
• Automotive infotainment systems

Procurement Notes

Verify the specific ordering suffix to ensure the correct tape-and-reel packaging configuration matches your assembly requirements. Confirm that the thermal environment of the application does not exceed the maximum operating temperature rating to maintain proper function. Check datasheet specifications for derating curves if ambient temperatures approach the upper limit.

Selection Notes

Select this component based on the required holding current of 5.0A and the system's maximum operating voltage of 32V DC. Ensure the PCB layout allows for adequate thermal dissipation given the surface-mount form factor. Consider the trip time characteristics relative to the protected circuit's surge tolerance during initial power-up phases.

Part Context

This part belongs to Bourns' CHF series of surface-mount polymeric resettable fuses. The series is engineered for modern electronics where traditional fuses are impractical due to size or maintenance constraints. The CHF3020DBF500L specifically targets applications needing robust protection in small footprints.

Replacement Considerations

When substituting, verify that the replacement part matches the 3020 package dimensions and the 5.0A holding current specification. Ensure the new component supports the same 32V DC rating and meets the required breaking capacity of 100A. Thermal performance characteristics should be comparable to avoid reliability issues.