PFRT.008.250 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFRT.008.250 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V maximum voltage with an 80 mA hold current (Ih). This component is designed for overcurrent protection in through-hole radial disc configurations. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and component procurement.

Substiute Parts

PFRT.008.250

SCHURTER Inc.In Stock: 1118PFRT.008.250 Datasheet

Current PartRFQ

TRF250-080T

Littelfuse Inc.In Stock: 5870TRF250-080T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PFRT.008.250 is determined by strict equivalence across the following critical parameters:

Voltage rating (60V maximum with 250V internal rating), hold current specification (80 mA Ih maximum), maximum current capacity (3 A), initial resistance (15 Ohms minimum), post-trip resistance (33 Ohms maximum), mounting configuration (through-hole radial disc), and regulatory compliance certifications (CSA, TUV, UL).

The TRF250-080T from Littelfuse Inc. meets all specified electrical and mechanical requirements for direct substitution. Both components share identical voltage, current, and resistance parameters, maintain compatible physical form factors, and carry equivalent regulatory approvals.

Parameter Comparison

Engineering Selection Recommendations

The TRF250-080T is a direct functional equivalent for the PFRT.008.250. Both components carry identical electrical specifications and regulatory certifications (CSA, TUV, UL). The TRF250-080T maintains active product status with established supply availability, whereas the PFRT.008.250 is obsolete. Both components meet ROHS3 compliance requirements. The operating temperature range of the TRF250-080T (-40°C ~ 85°C) encompasses the primary operating window of the PFRT.008.250 (-45°C ~ 85°C), with the lower temperature limit differing by 5°C. This minor variance does not affect substitution suitability for standard industrial applications within the specified temperature envelope.

Frequently Asked Questions (FAQ)

Q: Can the TRF250-080T directly replace the PFRT.008.250 in existing designs?

A: Yes. Both components share identical voltage ratings (60V), hold current specifications (80 mA), maximum current capacity (3 A), resistance parameters, and regulatory approvals. The through-hole radial disc mounting configuration is identical, enabling direct board-level substitution.

Q: What is the significance of the operating temperature range difference?

A: The PFRT.008.250 operates from -45°C to 85°C, while the TRF250-080T operates from -40°C to 85°C. The 5°C difference at the lower temperature limit does not impact substitution for applications operating within standard industrial temperature ranges. Applications requiring operation below -40°C require design review.

Q: Are there physical dimension differences between these components?

A: Both components use radial disc packaging. The PFRT.008.250 measures 0.209" L x 0.197" W (5.30mm x 5.00mm) with 0.366" seated height. The TRF250-080T measures 0.228" Dia x 0.181" T (5.80mm x 4.60mm) with 0.390" seated height. These minor dimensional variations are typical within radial disc form factors and do not prevent board-level substitution.

Q: Do both components carry equivalent regulatory certifications?

A: Yes. Both the PFRT.008.250 and TRF250-080T carry CSA, TUV, and UL approvals. Both are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements for industrial and consumer applications.

Q: Why is the PFRT.008.250 listed as obsolete?

A: Manufacturer discontinuation of the PFRT.008.250 necessitates transition to active alternatives. The TRF250-080T provides equivalent electrical performance and regulatory compliance with ongoing supply availability.