SMD150F/33-2920-2

Ptc Resettable Fuses Overview

The Littelfuse SMD150F/33-2920-2 is a POLY-FUSE resettable PTC device in the 2920L series, designed for surface-mount applications. It features a hold current of 1.5 A and a trip current of 3.0 A, with a maximum voltage rating of 33 VDC. The component has a maximum resistance of 0.06 Ohms and a fault current rating of 100 A. Physical dimensions are 7.98 mm in length, 5.44 mm in width, and 1.6 mm in height. It operates within a temperature range of -40°C to +85°C and dissipates up to 2 W of power.

Ptc Resettable Fuses Feature Summary

• Provides reliable overcurrent protection by raising internal resistance as it heats during fault conditions
• Automatically resets to a low-resistance state once the fault condition is removed and the device cools down
• Designed for surface-mount integration onto printed circuit boards to protect sensitive components

Ptc Resettable Fuses Applications

• Protection of circuits in battery-powered devices
• Overcurrent safeguarding for portable electronics
• Circuit protection for LED arrays
• Defense against shorts in networking equipment
• Protection for AC-DC and DC-DC power adapters

Ptc Resettable Fuses Procurement Notes

Verify that the specific part number matches the required electrical parameters, particularly the 1.5 A hold current and 33 VDC rating. Confirm the package type is the 2920 (7450 metric) surface-mount variant. Ensure compliance with RoHS standards and check moisture sensitivity level requirements for your assembly process. Cross-reference the manufacturer's latest datasheet to confirm active status and any potential obsolescence notices before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component when the circuit requires a resettable fuse with a 1.5 A nominal holding capacity and a 33 VDC maximum operating voltage. The 2920 form factor is suitable for applications needing higher current handling than smaller packages while maintaining a compact footprint. Ensure the expected fault currents do not exceed the 100 A interrupting rating. Consider the thermal environment, as the device relies on ambient cooling to reset; high ambient temperatures may reduce the effective hold current.

Ptc Resettable Fuses Part Context

This device belongs to the Littelfuse 2920L series of POLY-FUSE resettable PTC devices. These solid-state fuses are engineered to provide overcurrent protection for automotive, telecom, and general electronic applications. The series offers various hold currents and voltage ratings in a standardized surface-mount package, allowing designers to integrate reliable circuit protection without sacrificing board space or requiring manual replacement after a fault event.

Ptc Resettable Fuses Replacement Considerations

Direct substitutes include other 2920-series PPTCs from Littelfuse with matching 1.5 A hold current and 33 VDC ratings, such as SMD150F/33-2920. Generic equivalents from other manufacturers must match the 7.98 x 5.44 mm footprint, 1.5 A I_H, 3.0 A I_T, and 33 V_max specifications to ensure functional compatibility.