MF-NSML190-2

Ptc Resettable Fuses Overview

The Bourns MF-NSML190-2 is a surface-mount polymeric positive temperature coefficient (PPTC) resettable fuse designed for circuit protection. It features a holding current of 1.9 A and a trip current of 4.9 A, with a maximum voltage rating of 6 VDC. The device offers a high fault current capacity of 50 A and exhibits low resistance characteristics. Packaged in a 1206 (3216 Metric) SMD form factor, it operates within a temperature range of -40°C to +85°C.

Ptc Resettable Fuses Feature Summary

• Polymeric PTC technology provides automatic reset functionality after fault conditions clear
• Low ohmic design minimizes power loss and heat generation during normal operation
• Surface mount construction enables automated assembly and compact board integration

Ptc Resettable Fuses Applications

• Portable electronic devices requiring overcurrent protection
• Battery packs and power management circuits
• USB peripheral interfaces and data lines
• Automotive electronics compliant with AEC-Q200 standards

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix designation against the manufacturer's official datasheet to confirm exact electrical tolerances and packaging specifications. Ensure that the selected component meets the required thermal derating curves for your specific operating environment. Cross-reference the package outline dimensions with your PCB footprint library to guarantee mechanical compatibility before finalizing procurement orders.

Ptc Resettable Fuses Selection Notes

Select this component when a low-voltage, high-current resettable fuse is required for sensitive downstream circuitry. The 1206 package size balances current handling capability with space constraints on dense printed circuit boards. Consider the trip current margin relative to the application's peak operational load to prevent nuisance tripping while ensuring adequate protection against short circuits.

Ptc Resettable Fuses Part Context

This part belongs to Bourns' NSM series of low-ohmic resettable fuses, engineered for high-performance applications where minimal impedance is critical. The series is characterized by fast response times and robust fault tolerance, making it suitable for modern digital systems. It complements other circuit protection solutions by offering reliable, maintenance-free overcurrent defense without permanent damage to the protective element.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include the MF-NSML190-2 from alternative manufacturers if pin-compatible, or the MF-USML190-2 for similar performance profiles. Verify that any replacement maintains the same 1206 footprint, 6V rating, and 1.9A holding current to ensure functional equivalence in the existing circuit design.

Ptc Resettable Fuses FAQ

What is the maximum fault current this fuse can withstand?

The MF-NSML190-2 is rated to handle a maximum fault current of 50 A.

Does this component require manual resetting after a trip event?

No, it is a self-resetting device that returns to its low-resistance state once the fault condition is removed and the component cools down.