MINISMDC125F-2

$0.49

Description：PTC RESET FUSE 6V 1.25A 1812
Series：PolySwitch®, miniSMD
Mfr：Littelfuse Inc.
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:6953733c29dc Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 6V 1.25A 1812
Series：PolySwitch®, miniSMD
Mfr：Littelfuse Inc.
Package：Tape & Reel (TR),Cut Tape (CT)
Type：Polymeric
Voltage - Max：6V
Current - Hold (Ih) (Max)：1.25 A
Current - Trip (It)：2.5 A
Current - Max：100 A
Time to Trip：400 ms
Resistance - Initial (Ri) (Min)：50 mOhms
Resistance - Post Trip (R1) (Max)：140 mOhms
Resistance - 25°C (Typ)：-
Operating Temperature：-40°C ~ 85°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Surface Mount
Package / Case：1812 (4532 Metric), Concave
Size / Dimension：0.179" L x 0.128" W (4.55mm x 3.24mm)
Height - Seated (Max)：-
Thickness (Max)：0.019" (0.48mm)
Lead Spacing：-

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MINISMDC125F-2

Overview

The Littelfuse MINISMDC125F-2 is a surface-mount PolySwitch resettable fuse designed for circuit protection. It features a hold current of 1.25 A and a trip current of 2.5 A, operating at a maximum voltage of 6 VDC. The device supports a maximum fault current (Imax) of 100 A and has an initial resistance of 70 mOhms. Housed in a miniSMD package with dimensions of 3.41 mm length, 1.46 mm width, and 0.62 mm height, it operates within a temperature range of -40°C to +85°C.

Feature Summary

Provides automatic resettable overcurrent protection using polymer PTC technology
Offers high fault current tolerance up to 100 A for robust circuit safeguarding
Features a compact surface-mount footprint suitable for space-constrained designs

Applications

Portable electronic devices requiring low-voltage circuit protection
Consumer electronics with limited board space
Battery-powered equipment needing overcurrent safeguards

Procurement Notes

Verify the specific voltage rating and package dimensions against the target design requirements before procurement. Confirm that the hold current and trip current specifications align with the operational parameters of the protected circuit. Ensure compatibility with surface-mount assembly processes and check for any moisture sensitivity level constraints during storage and handling.

Selection Notes

Select this component when a low-profile, surface-mount solution is required for circuits operating at 6 VDC or lower. The 1.25 A hold current makes it suitable for protecting low-power loads. Consider the 70 mOhms initial resistance for potential voltage drop impacts in sensitive applications. Evaluate the thermal environment to ensure operation remains within the specified -40°C to +85°C range.

Part Context

This part belongs to the miniSMDC series of PolySwitch resettable fuses from Littelfuse. The series is characterized by its small form factor and reliability in consumer and industrial applications. It serves as a reusable alternative to traditional fusible links, offering protection against overcurrent conditions without requiring manual replacement after a fault event.