MF-SM125-2

$0.39

Description：PTC RESET FUSE 15V 1.25A 2SMD
Series：Multifuse®, MF-SM
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:6500fefa01b7 Category: PTC Resettable Fuses Brand: Bourns Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 15V 1.25A 2SMD
Series：Multifuse®, MF-SM
Mfr：Bourns Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：15V
Current - Hold (Ih) (Max)：1.25 A
Current - Trip (It)：2.5 A
Current - Max：100 A
Time to Trip：2 s
Resistance - Initial (Ri) (Min)：70 mOhms
Resistance - Post Trip (R1) (Max)：250 mOhms
Operating Temperature：-40°C ~ 85°C
Grade：Automotive
Qualification：AEC-Q200
Ratings：-
Mounting Type：Surface Mount
Package / Case：2-SMD
Size / Dimension：0.287" L x 0.214" W (7.31mm x 5.44mm)
Height - Seated (Max)：-
Thickness (Max)：0.118" (3.00mm)
Lead Spacing：-

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MF-SM125-2

Overview

The Bourns MF-SM125-2 is a Multifuse polymer PTC resettable fuse designed for surface mount applications. It features a 1.25 A hold current and a maximum voltage rating of 15 VDC. The device operates within a temperature range of -40°C to +85°C and utilizes a 2920 (7450 metric) package. Key electrical specifications include a trip current of 2.5 A, a maximum rated current of 100 A, and an initial resistance of 250 mΩ.

Feature Summary

Provides overcurrent protection through automatic resistance increase during fault conditions
Offers robust circuit safeguarding in high-voltage and high-temperature environments
Eliminates nuisance tripping caused by ambient temperature variations

Applications

Automotive circuitry protection
Overcurrent surge protection for high-reliability electronic equipment
Industrial transportation systems
Communication infrastructure
Consumer electronic devices

Procurement Notes

Verify the specific datasheet version and component status before procurement, as availability may vary. Confirm that the 2920 package dimensions align with the target PCB layout. Ensure the 15 VDC maximum voltage rating meets the system requirements. Check for RoHS compliance documentation if required by project standards. Validate the operating temperature range against environmental constraints.

Selection Notes

Select this component when space-constrained layouts require surface mount overcurrent protection. Choose based on the 1.25 A hold current and 15 VDC rating to match circuit parameters. Consider the 2920 package size for board real estate optimization. Evaluate the 250 mΩ resistance impact on power loss. Ensure the -40°C to +85°C range covers operational extremes.

Part Context

This part belongs to the Multifuse MF-SM series of polymer PTC resettable fuses from Bourns. The series provides cost-effective protection against short circuits and overcurrent events. These components are engineered for demanding settings with high voltage and temperature stresses. The design focuses on reducing false trips while maintaining reliable fault detection.