Equivalent & Substitute Parts for MF-R065-AP-99

Part Overview

The MF-R065-AP-99 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc. as part of the Multifuse® MF-R series. This component is rated for 60V maximum voltage with a 650 mA hold current and is designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

MF-R065-AP-99

Bourns Inc.In Stock: 1139MF-R065-AP-99 Datasheet

Current PartRFQ

MF-R065-AP

Bourns Inc.In Stock: 2153MF-R065-AP Datasheet

Parametric EquivalentRFQ

MF-RX065/72-AP-17

Bourns Inc.In Stock: 777MF-RX065/72-AP-17 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for PTC resettable fuses is determined by the following critical parameters:

Voltage Rating: The substitute must meet or exceed the maximum voltage requirement of 60V. Parts rated for higher voltages are acceptable as they provide backward compatibility.

Current Characteristics: The hold current (Ih), trip current (It), and maximum current must match or be compatible with the circuit design. All identified substitutes maintain the 650 mA hold current and 1.3 A trip current specifications.

Thermal and Resistance Properties: Initial resistance (Ri) and post-trip resistance (R1) must remain within specified tolerances to ensure consistent circuit protection behavior.

Physical Form Factor: Through-hole radial disc configuration with matching lead spacing (0.201" / 5.10mm) ensures mechanical compatibility with existing PCB layouts.

Compliance and Certifications: RoHS3 compliance and regulatory approvals (cURus, TUV, UL) confirm suitability for current manufacturing and market requirements.

Parameter Comparison

Engineering Selection Recommendations

MF-R065-AP: This part is the direct functional equivalent to MF-R065-AP-99, maintaining identical electrical specifications and physical form factor. The primary distinction is product status: MF-R065-AP is currently active in production, whereas MF-R065-AP-99 is obsolete. This substitute is packaged in Cut Tape (CT) format and represents the standard replacement for discontinued inventory.

MF-RX065/72-AP-17: This part shares all critical electrical parameters with the main part but features a higher maximum voltage rating of 72V compared to 60V. The elevated voltage rating provides additional design margin for circuits operating near the 60V threshold. This substitute is packaged in Tape & Box (TB) format and carries expanded regulatory approvals including cUL and UL certifications, along with AEC-Q200 automotive qualification. Selection of this part is appropriate for applications requiring enhanced voltage headroom or automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can MF-R065-AP be used as a direct replacement for MF-R065-AP-99?

A: Yes. Both parts are identical in electrical performance, physical dimensions, and lead spacing. The primary difference is that MF-R065-AP is in active production status while MF-R065-AP-99 is obsolete. MF-R065-AP is the recommended replacement for new designs and production continuity.

Q: What is the difference between MF-R065-AP and MF-RX065/72-AP-17?

A: The primary electrical difference is the maximum voltage rating: MF-R065-AP is rated for 60V, while MF-RX065/72-AP-17 is rated for 72V. All other electrical parameters—hold current, trip current, resistance characteristics, and time to trip—are identical. MF-RX065/72-AP-17 also carries additional regulatory certifications (cUL, UL) and AEC-Q200 automotive qualification.

Q: Can I use MF-RX065/72-AP-17 in a circuit designed for 60V operation?

A: Yes. The higher voltage rating of MF-RX065/72-AP-17 (72V) is backward compatible with 60V circuit designs. The component will function identically in all electrical respects. This substitution is appropriate when higher voltage margin is desired or when automotive-grade certification is required.

Q: Are there packaging differences between the substitute parts?

A: Yes. MF-R065-AP is supplied in Cut Tape (CT) packaging, while MF-RX065/72-AP-17 is supplied in Tape & Box (TB) packaging. Both maintain the same physical form factor and lead spacing, ensuring PCB compatibility. Packaging selection depends on procurement and assembly requirements.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. Both MF-R065-AP and MF-RX065/72-AP-17 are ROHS3 compliant, matching the compliance status of the original MF-R065-AP-99 part.