SRP175SF

Ptc Resettable Fuses Overview

The SRP175SF is a PolySwitch resettable fuse from Littelfuse, designed for overcurrent protection in low-voltage circuits. It features a hold current of 1.75 A and a trip current of 3.8 A, with a maximum voltage rating of 15 V. The device has a maximum interrupting rating of 100 A and a typical resistance of 50 mOhms. It dissipates up to 1.5 W of power and operates within a temperature range of -40°C to +85°C. The component utilizes an axial strap mount configuration with solder pad termination.

Ptc Resettable Fuses Feature Summary

• Provides automatic circuit recovery after fault clearance without manual replacement
• Utilizes polymeric positive temperature coefficient material for rapid response to overcurrent events
• Designed for surface-mount integration via solder pad termination on printed circuit boards

Ptc Resettable Fuses Applications

• Protection of battery chargers and power adapters
• Overcurrent safeguarding for LED lighting circuits
• Circuit protection in handheld electronic devices
• Defense against shorts in networking equipment

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation (SS vs SF) as Littelfuse distinguishes between strap mount variants. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as historical data indicates potential variations. Ensure the selected variant matches the required axial lead spacing and physical dimensions for the target PCB footprint before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component when a 1.75 A hold current and 15 V maximum voltage are required for compact circuit protection. The 50 mOhms resistance minimizes voltage drop in sensitive low-power applications. Consider the 100 A interrupting rating for robust short-circuit defense. Verify that the operating environment stays within the specified -40°C to +85°C range to ensure reliable tripping characteristics and long-term stability.

Ptc Resettable Fuses Part Context

The SRP175SF belongs to the SRP series of PolySwitch resettable fuses, which are engineered for surface-mount applications. This series provides a compact alternative to traditional axial fuses, offering space-saving benefits for modern electronics. The SRP family is widely recognized for its reliability in consumer electronics and industrial control systems where frequent maintenance access is limited or impractical.

Ptc Resettable Fuses Replacement Considerations

The SRP175SS is a documented substitute part number within the same product line. Verify that the SS variant meets the exact electrical parameters and physical mounting requirements of the original design. Cross-reference datasheets to confirm identical hold current, trip current, and voltage ratings before implementing any substitution in production.

Ptc Resettable Fuses FAQ

What is the maximum interrupting rating of the SRP175SF?

The SRP175SF has a maximum interrupting rating of 100 A.

Does the SRP175SF require manual replacement after tripping?

No, it is a resettable fuse that automatically returns to a low-resistance state once the fault condition is removed and the device cools down.