06R120BU

Description：PTC RESET FUSE 6V 1.2A RADIAL
Series：POLY-FUSE®, USBR
Mfr：Littelfuse Inc.
Package：Bulk

SKU:3302b82accac Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

Product Detailed Parameters

Description：PTC RESET FUSE 6V 1.2A RADIAL
Series：POLY-FUSE®, USBR
Mfr：Littelfuse Inc.
Package：Bulk
Type：Polymeric
Voltage - Max：6V
Current - Hold (Ih) (Max)：1.2 A
Current - Trip (It)：2:00 AM
Current - Max：40 A
Time to Trip：500 ms
Resistance - Initial (Ri) (Min)：65 mOhms
Resistance - Post Trip (R1) (Max)：140 mOhms
Resistance - 25°C (Typ)：-
Operating Temperature：-40°C ~ 85°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.272" Dia x 0.118" T (6.90mm x 3.00mm)
Height - Seated (Max)：0.449" (11.40mm)
Thickness (Max)：-
Lead Spacing：0.201" (5.10mm)

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06R120BU

Overview

The Littelfuse Inc. 06R120BU is a polymer PTC resettable fuse from the POLY-FUSE USBR series, designed for overcurrent protection in low-voltage circuits. It features a maximum voltage rating of 6V and a hold current (Ih) of 1.2A. The device trips at 2A and supports a maximum fault current of 40A. Initial resistance is typically 65 mOhms, rising to a maximum of 140 mOhms after tripping. It utilizes radial, disc-style through-hole packaging with dimensions of 6.90mm diameter by 3.00mm height. Certified by cURus and TUV, it operates within a temperature range of -40°C to 85°C.

Feature Summary

Provides automatic circuit recovery after fault conditions without manual replacement
Offers reliable overcurrent protection for sensitive electronic components
Features compact radial leaded design suitable for space-constrained PCB layouts

Applications

USB port protection
Portable electronics circuit safeguarding
Low-voltage data line overcurrent protection

Procurement Notes

Verify component authenticity through authorized Littelfuse distributors or certified partners. Confirm part number accuracy against official datasheets to ensure correct electrical specifications. Check for obsolescence status and available lifecycle alternatives prior to procurement. Validate RoHS compliance documentation for regulatory adherence. Ensure storage conditions maintain moisture sensitivity level integrity before assembly.

Selection Notes

Select this component based on the 6V maximum voltage rating and 1.2A hold current requirements. Ensure the application current remains below 1.2A during normal operation to prevent nuisance tripping. Verify that the 2A trip current aligns with the circuit's tolerance for transient surges. Consider the radial package dimensions for PCB footprint compatibility. Confirm thermal management capabilities within the specified -40°C to 85°C operating range.

Part Context

The 06R120BU belongs to the POLY-FUSE USBR series, specifically engineered for universal serial bus applications. This series provides cost-effective overcurrent protection solutions for consumer electronics. The radial leaded format facilitates automated insertion processes. It serves as a reusable alternative to traditional one-time fuses, enhancing system reliability and reducing maintenance costs in portable devices.