250R120-R1U

$0.39

Description：PTC RESET FUSE 60V 120MA RADIAL
Series：POLY-FUSE®, 250R
Mfr：Littelfuse Inc.
Package：Bulk

SKU:6df2e934f532 Category: PTC Resettable Fuses Brand: Littelfuse Inc.

Consult the customer manager about the wholesale price.

consultation hotline：86-132-6715-2157

email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.

Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.

Product introduction

250R120-R1U is listed in the Ptc Resettable Fuses range at ChipApex. The manufacturer field lists Littelfuse Inc.. Its product description is PTC RESET FUSE 60V 120MA RADIAL. Review the specifications below when checking this part for your BOM.

Ptc Resettable Fuses specifications for 250R120-R1U

Description：PTC RESET FUSE 60V 120MA RADIAL
Series：POLY-FUSE®, 250R
Mfr：Littelfuse Inc.
Package：Bulk
Type：Polymeric
Voltage - Max：60V (250V Int)
Current - Hold (Ih) (Max)：120 mA
Current - Trip (It)：240 mA
Current - Max：3:00 AM
Time to Trip：2.5 s
Resistance - Initial (Ri) (Min)：6 Ohms
Resistance - Post Trip (R1) (Max)：16 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：0.201" (5.10mm)

Ptc Resettable Fuses datasheet and documents for 250R120-R1U

250R120-R1U

Ptc Resettable Fuses Overview

The Littelfuse 250R120-R1U is a polymeric resettable PTC fuse from the 250R series, designed for radial PCB mounting. It features a hold current of 120 mA and a trip current of 240 mA. The device supports a maximum voltage of 60 VDC, with an internal rating of 250V. It has a maximum rated current of 3 A and a resistance of 16 ohms. Operating temperatures range from -40°C to +85°C, with a lead spacing of 5 mm.

Ptc Resettable Fuses Feature Summary

Provides protection against short-duration high-voltage fault currents such as power cross or induction surges.
Utilizes polymeric technology to automatically reset after fault conditions clear.
Designed specifically for telecom applications requiring fast time-to-trip response.

Ptc Resettable Fuses Applications

Telecom equipment protection
LAN/WAN interface circuits
Access equipment surge suppression

Ptc Resettable Fuses Procurement Notes

Verify component status as obsolete before integration. Confirm alternative sourcing channels or equivalent replacements due to discontinuation. Ensure compatibility with existing PCB footprints and thermal requirements during transition planning.

Ptc Resettable Fuses Selection Notes

Select based on 120 mA hold current and 60 VDC operating voltage limits. Consider the 250R series family for similar radial leaded configurations. Evaluate trip characteristics and thermal derating curves for specific circuit environments.

Ptc Resettable Fuses Part Context

Part of the POLY-FUSE 250R series by Littelfuse Inc., focusing on radial-leaded PTC devices. This series targets telecom infrastructure protection against transient overvoltages and short-duration faults.