RUSBF090

Ptc Resettable Fuses Overview

The Littelfuse RUSBF090 is a PolySwitch radial-leaded resettable PPTC fuse designed for circuit protection. It features a hold current of 0.9 A and a trip current of 1.8 A, with a maximum voltage rating of 16 VDC. The device has a maximum resistance of 180 mOhms and a power dissipation of 0.6 W. It operates within a temperature range of -40°C to +60°C and offers an interrupting rating of 100 A. The component measures 7.4 mm in width, 12.2 mm in length, and 3 mm in height, utilizing a standard bulk packaging format.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising internal resistance during fault conditions
• Automatically resets to low-resistance state after cooling following fault clearance
• Radial leaded form factor enables direct PCB mounting for compact designs

Ptc Resettable Fuses Applications

• Protection of battery packs and rechargeable cells from overcurrent events
• Overcurrent safeguarding for telecommunications and networking equipment
• Circuit protection for AC-DC and DC-DC power converters
• Protection of electronic ballasts and LED lighting systems

Ptc Resettable Fuses Procurement Notes

Verify the specific datasheet version for the RUSBF090 to confirm compliance with RoHS standards and agency approvals such as UL, CSA, and TUV. Ensure that the selected component matches the required 16 VDC voltage rating and 0.9 A hold current specifications for the target application. Confirm that the radial lead spacing and physical dimensions are compatible with the intended PCB layout and assembly process before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select the RUSBF090 when applications require a resettable fuse with a 0.9 A hold current and a 16 VDC maximum voltage rating. This component is suitable for circuits where automatic recovery after fault clearance is necessary. Consider the 180 mOhms maximum resistance and 0.6 W power dissipation limits to ensure thermal stability. Verify that the operating temperature range of -40°C to +60°C aligns with the environmental conditions of the end product.

Ptc Resettable Fuses Part Context

The RUSBF090 belongs to the RUSBF series of PolySwitch resettable fuses manufactured by Littelfuse. These devices utilize polymer positive temperature coefficient technology to provide overcurrent protection. The series is characterized by its radial leaded construction, making it suitable for through-hole PCB mounting. The RUSBF series is widely used in consumer electronics, industrial controls, and automotive applications requiring reliable circuit protection.

Ptc Resettable Fuses Replacement Considerations

Consult official Littelfuse documentation for verified substitute part numbers. Cross-reference hold current, trip current, voltage rating, and package dimensions when evaluating alternatives.