PFRA.040.3 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The PFRA.040.3 is a polymeric PTC resettable fuse manufactured by SCHURTER Inc., rated for 60V at 400 mA hold current with through-hole radial disc packaging. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part provides overcurrent protection with automatic reset capability across industrial and consumer electronics applications operating within -40°C to 85°C temperature ranges.

Substiute Parts

PFRA.040.3

SCHURTER Inc.In Stock: 1051PFRA.040.3 Datasheet

Current PartRFQ

PFRA.040.2

SCHURTER Inc.In Stock: 858PFRA.040.2 Datasheet

DirectRFQ

MF-R040-AP

Bourns Inc.In Stock: 748MF-R040-AP Datasheet

Parametric EquivalentRFQ

MF-R040-AP-17

Bourns Inc.In Stock: 1160MF-R040-AP-17 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PFRA.040.3 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 60V maximum
• Current hold specification: 400 mA
• Current trip specification: 800 mA
• Time to trip: 3.8 seconds
• Initial resistance: 520 mOhms minimum
• Post-trip resistance: 1.29 Ohms maximum
• Operating temperature range: -40°C to 85°C
• Mounting configuration: Through-hole radial disc
• Physical dimensions: 0.291" diameter × 0.122" thickness (7.40mm × 3.10mm)
• Lead spacing: 0.201" (5.10mm)
• Polymeric PTC type classification

All substitute parts listed maintain identical electrical performance characteristics and mechanical compatibility with the original PFRA.040.3 specification.

Parameter Comparison

Engineering Selection Recommendations

PFRA.040.2 is the direct manufacturer equivalent from SCHURTER Inc., maintaining identical electrical and mechanical specifications with active product status. This part is suitable for applications requiring continuity with the original SCHURTER product line.

MF-R040-AP and MF-R040-AP-17 are parametric equivalents from Bourns Inc. (Multifuse® series) with identical performance characteristics. MF-R040-AP-17 carries expanded approval certifications including cUL and UL in addition to cURus and TUV, making it suitable for applications with stringent regulatory requirements. Both Bourns alternatives are in active production status.

Selection between SCHURTER and Bourns alternatives depends on supply chain requirements, existing qualification documentation, and regulatory compliance needs specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can PFRA.040.2 directly replace PFRA.040.3 in existing designs?

A: Yes. PFRA.040.2 maintains identical electrical parameters, physical dimensions, lead spacing, and performance characteristics. The primary difference is packaging format (Cut Tape versus original packaging) and active product status. PCB layout and circuit functionality remain unchanged.

Q: What is the difference between SCHURTER PFRA.040.2 and Bourns MF-R040-AP substitutes?

A: Both maintain identical electrical specifications and physical form factors. The primary differences are manufacturer, series designation (PFRA versus Multifuse® MF-R), and approval agency certifications. SCHURTER PFRA.040.2 carries cURus and TUV approvals. Bourns MF-R040-AP carries identical certifications, while MF-R040-AP-17 includes additional cUL and UL approvals.

Q: Are there packaging differences between substitute parts?

A: Yes. PFRA.040.3 original packaging is unspecified. PFRA.040.2 is supplied in Cut Tape (CT) format. MF-R040-AP and MF-R040-AP-17 are supplied in Tape & Box (TB) format. All maintain identical component specifications and through-hole radial disc form factor.

Q: Does MF-R040-AP-17 offer advantages over other substitutes?

A: MF-R040-AP-17 includes AEC-Q200 automotive qualification rating and expanded approval certifications (cUL, cURus, TUV, UL). Select this variant for applications requiring automotive-grade reliability or broader regulatory compliance documentation.

Q: Are all substitutes RoHS3 compliant?

A: Yes. PFRA.040.2, MF-R040-AP, and MF-R040-AP-17 are all ROHS3 compliant with REACH unaffected status, matching the original PFRA.040.3 environmental compliance profile.