RUEF300U

$0.51

Description：PTC RESET FUSE 30V 3A RADIAL
Series：PolySwitch®, RUEF
Mfr：Littelfuse Inc.
Package：Bag

SKU:3e8a5ea6f07a Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

RUEF300U is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 30V 3A RADIAL. Review the specifications below when checking this part for your BOM.

Ptc Resettable Fuses specifications for RUEF300U

Description：PTC RESET FUSE 30V 3A RADIAL
Series：PolySwitch®, RUEF
Mfr：Littelfuse Inc.
Package：Bag
Type：Polymeric
Voltage - Max：30V
Current - Hold (Ih) (Max)：3:00 AM
Current - Trip (It)：6:00 AM
Current - Max：100 A
Time to Trip：10.8 s
Resistance - Initial (Ri) (Min)：20 mOhms
Resistance - Post Trip (R1) (Max)：80 mOhms
Operating Temperature：-40°C ~ 85°C
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.449" L x 0.118" W (11.40mm x 3.00mm)
Height - Seated (Max)：0.650" (16.50mm)
Thickness (Max)：-
Lead Spacing：0.199" (5.05mm)

Ptc Resettable Fuses datasheet and documents for RUEF300U

RUEF300U

Ptc Resettable Fuses Overview

The Littelfuse RUEF300U is a PolySwitch radial-leaded PPTC resettable fuse designed for overcurrent protection. It features a maximum voltage rating of 30 VDC, a hold current (Ih) of 3 A, and a trip current (It) of 6 A. The device has a maximum resistance of 80 mOhms after tripping and a minimum initial resistance of 20 mOhms. It operates within a temperature range of -40°C to +85°C, with a power dissipation of 2 W and a maximum fault current rating of 100 A.

Ptc Resettable Fuses Feature Summary

Provides reliable overcurrent protection through automatic resistance increase upon heating during fault conditions.
Offers resettable functionality to restore circuit continuity without manual replacement.
Compatible with high-volume electronics assembly processes including wave soldering.

Ptc Resettable Fuses Applications

Computer motherboards
USB hubs, ports and peripherals
Industrial controls

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix 'U' against the manufacturer's official datasheet to confirm packaging or material variations. Ensure the selected component matches the required lead spacing and mounting style for the target PCB layout. Cross-reference agency approvals such as UL, CSA, TUV, and CQC with local regulatory requirements before finalizing procurement.

Ptc Resettable Fuses Selection Notes

Select this component when a 3 A hold current and 30 VDC rating are required for low-voltage DC circuits. Consider the 80 mOhms maximum resistance impact on signal integrity or power loss. Verify that the 100 A maximum fault current rating exceeds the potential short-circuit levels in the application environment.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse RUEF series of PolySwitch radial-leaded devices. The series provides a comprehensive set of PPTC products balancing voltage ratings up to 30V and hold currents up to 9A. These devices are designed for compact form factors and are compatible with standard surface mount and through-hole assembly techniques.