TRF250-145-B-0.5

$0.46

Description：PTC RESET FUSE 60V 145MA RADIAL
Series：PolySwitch®, TRF250
Mfr：Littelfuse Inc.
Package：Bag

SKU:63d6849363cf Category: PTC Resettable Fuses Brand: Littelfuse Inc.

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Product introduction

TRF250-145-B-0.5 is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 60V 145MA RADIAL. Review the specifications below when checking this part for your BOM.

Ptc Resettable Fuses specifications for TRF250-145-B-0.5

Description：PTC RESET FUSE 60V 145MA RADIAL
Series：PolySwitch®, TRF250
Mfr：Littelfuse Inc.
Package：Bag
Type：Polymeric
Voltage - Max：60V (250V Int)
Current - Hold (Ih) (Max)：145 mA
Current - Trip (It)：290 mA
Current - Max：3:00 AM
Time to Trip：5 s
Resistance - Initial (Ri) (Min)：3 Ohms
Resistance - Post Trip (R1) (Max)：14 Ohms
Resistance - 25°C (Typ)：-
Operating Temperature：-40°C ~ 85°C
Grade：-
Qualification：-
Ratings：-
Mounting Type：Through Hole
Package / Case：Radial, Disc
Size / Dimension：0.256" L x 0.181" W (6.50mm x 4.60mm)
Height - Seated (Max)：0.433" (11.00mm)
Thickness (Max)：-
Lead Spacing：0.197" (5.00mm)

Ptc Resettable Fuses datasheet and documents for TRF250-145-B-0.5

TRF250-145-B-0.5

Ptc Resettable Fuses Overview

The Littelfuse TRF250-145-B-0.5 is a PolySwitch resettable PPTC fuse designed for overcurrent protection in electronic circuits. It features a hold current of 145 mA and a trip current of 290 mA, with a maximum voltage rating of 60 VDC and 250 Vrms. The device has a maximum rated current of 3 A and an initial resistance of approximately 14 Ohms. It operates within a temperature range of -40°C to +85°C and utilizes a radial leaded package with a 5 mm lead spacing.

Ptc Resettable Fuses Feature Summary

Provides reliable overcurrent protection by increasing resistance as it heats during fault conditions
Automatically resets to low resistance state after the fault condition is removed and device cools
Designed for PCB mounting with radial leads for through-hole integration

Ptc Resettable Fuses Applications

Protection of wiring harnesses and circuit boards
Overcurrent protection for telecom equipment
Power supply circuit safeguarding

Ptc Resettable Fuses Procurement Notes

Verify the specific suffix configuration against official Littelfuse documentation to ensure the correct voltage and current ratings. Confirm that the radial leaded form factor matches the target PCB layout requirements. Check RoHS compliance status and agency approvals such as UL or CSA if required for the end application. Ensure the maximum operating temperature range aligns with the environmental conditions of the installation site.

Ptc Resettable Fuses Selection Notes

Select this component when a resettable protection solution is preferred over disposable fuses for circuits requiring maintenance-free operation. The 145 mA hold current suits low-power signal lines or control circuits. Consider the 60 VDC rating for DC applications and the 250 Vrms capability for AC line monitoring. Evaluate the thermal environment to ensure the device can dissipate heat effectively during normal operation without nuisance tripping.

Ptc Resettable Fuses Part Context

This part belongs to the Littelfuse TRF250 series of PolySwitch resettable fuses. The series offers various hold currents and package options to suit different circuit protection needs. The TRF250 designation indicates a standard radial leaded form factor commonly used in general electronics and industrial applications where space is limited but through-hole mounting is required.