MICROSMD550LR-2

$0.73

Description：PTC RESET FUSE 5V 5.5A 1210
Series：PolySwitch®, microSMD
Mfr：Littelfuse Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:14912a2e2bee Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

MICROSMD550LR-2 is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 5V 5.5A 1210. Review the specifications below when checking this part for your BOM.

Ptc Resettable Fuses specifications for MICROSMD550LR-2

Description：PTC RESET FUSE 5V 5.5A 1210
Series：PolySwitch®, microSMD
Mfr：Littelfuse Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：5V
Current - Hold (Ih) (Max)：5.5 A
Current - Trip (It)：11:00 AM
Current - Max：50 A
Time to Trip：2 s
Resistance - Initial (Ri) (Min)：2 mOhms
Resistance - Post Trip (R1) (Max)：6.5 mOhms
Resistance - 25°C (Typ)：-
Operating Temperature：-40°C ~ 80°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Surface Mount
Package / Case：1210 (3225 Metric), Concave
Size / Dimension：0.127" L x 0.102" W (3.22mm x 2.58mm)
Height - Seated (Max)：-
Thickness (Max)：0.039" (1.00mm)
Lead Spacing：-

Ptc Resettable Fuses datasheet and documents for MICROSMD550LR-2

MICROSMD550LR-2

Ptc Resettable Fuses Overview

The MICROSMD550LR-2 is a surface-mount polymeric PTC resettable fuse from the microSMD series. It features a hold current of 5.5 A and a trip current of 11 A at a maximum voltage of 5 VDC. The device has a maximum resistance of 0.002 Ohms and a rated current of 50 A. It operates within a temperature range of -40°C to 80°C, with a power dissipation of 1 W. The component is housed in a 1210 (3225 Metric) package.

Ptc Resettable Fuses Feature Summary

Provides overcurrent protection through automatic reset functionality upon fault removal
Utilizes low-resistance polymer technology for minimal circuit impact
Designed for surface mount assembly in compact electronic layouts

Ptc Resettable Fuses Applications

Portable consumer electronics protection
Battery pack circuit safeguarding
USB peripheral interface protection

Ptc Resettable Fuses Procurement Notes

Verify component availability as this part may be obsolete or discontinued. Confirm final specifications against the manufacturer's official datasheet SCD29166 before integration. Ensure compatibility with existing PCB footprints and thermal management requirements during the sourcing process.

Ptc Resettable Fuses Selection Notes

Select this component for applications requiring high hold current in a small form factor. Evaluate the 5 VDC rating against system voltage levels. Consider the 1210 package dimensions for board space constraints. Verify thermal derating curves if operating near maximum temperature limits.

Ptc Resettable Fuses Part Context

This part belongs to Littelfuse’s microSMD family of resettable fuses. These devices offer a balance of performance and size for modern electronics. The series is designed to replace traditional fusible resistors in space-constrained designs.