MF-R075-AP-99 Equivalent & Substitute Parts

Part Overview

The MF-R075-AP-99 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc. in the Multifuse® MF-R series. This component is rated for 60V maximum voltage with a 750 mA hold current and 1.5 A trip current, designed for through-hole radial mounting in disc configuration. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing circuit protection applications and system maintenance.

Substiute Parts

MF-R075-AP-99

Bourns Inc.In Stock: 820MF-R075-AP-99 Datasheet

Current PartRFQ

MF-R075-AP

Bourns Inc.In Stock: 12989MF-R075-AP Datasheet

Parametric EquivalentRFQ

MF-R075-AP-17

Bourns Inc.In Stock: 723MF-R075-AP-17 Datasheet

Parametric EquivalentRFQ

MF-RX075/72-AP-17

Bourns Inc.In Stock: 769MF-RX075/72-AP-17 Datasheet

Parametric EquivalentRFQ

60R075XU

Littelfuse Inc.In Stock: 302660R075XU Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-R075-AP-99 is determined by the following critical parameters:

• Voltage rating equal to or greater than 60V
• Hold current (Ih) of 750 mA
• Trip current (It) of 1.5 A
• Maximum current rating of 40 A
• Time to trip of 6.3 s
• Through-hole radial disc mounting configuration
• Lead spacing of 0.201" (5.10mm)
• Operating temperature range of -40°C ~ 85°C

Substitute parts are categorized as follows:

Parametric Equivalents (Bourns Inc.): Parts MF-R075-AP and MF-R075-AP-17 maintain identical electrical specifications and physical dimensions as the main part, with differences only in packaging format and product status.

Parametric Equivalent (Higher Voltage Rating): Part MF-RX075/72-AP-17 maintains all electrical and mechanical specifications except for a higher maximum voltage rating of 72V, providing backward compatibility for 60V applications.

Similar Substitute (Cross-Manufacturer): Part 60R075XU from Littelfuse Inc. matches the core electrical specifications and physical form factor, with minor variations in initial resistance and seated height within acceptable tolerance ranges.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MF-R075-AP-17 is the preferred substitute for the obsolete MF-R075-AP-99. This part maintains identical electrical and mechanical specifications while offering active product status and expanded approval certifications including cUL and UL in addition to cURus and TUV. The Tape & Box packaging format supports standard component handling and traceability requirements. AEC-Q200 automotive qualification provides additional reliability assurance.

Secondary Recommendation: MF-R075-AP serves as a direct parametric equivalent with identical specifications. This part is available in Cut Tape packaging and maintains active status. Selection between MF-R075-AP and MF-R075-AP-17 depends on packaging requirements and supply chain preferences.

Higher Voltage Alternative: MF-RX075/72-AP-17 is suitable for applications where a higher voltage margin is beneficial. The 72V rating provides backward compatibility with 60V circuits while offering enhanced overvoltage protection. This part carries the same expanded certifications as MF-R075-AP-17.

Cross-Manufacturer Option: 60R075XU from Littelfuse Inc. provides functional equivalence with matching electrical performance and physical form factor. The initial resistance specification of 250 mOhms is higher than the Bourns parts at 180 mOhms minimum, which may result in slightly different circuit behavior during normal operation. This part is available in bulk packaging and maintains active status with cURus and TUV certifications.

Frequently Asked Questions (FAQ)

Q: Can MF-R075-AP-17 be used as a direct replacement for MF-R075-AP-99?

A: Yes. MF-R075-AP-17 maintains identical voltage, current, resistance, and thermal specifications. The primary differences are product status (active vs. obsolete), packaging format (Tape & Box vs. original packaging), and expanded certifications. Physical dimensions and lead spacing are identical, ensuring PCB compatibility.

Q: What is the difference between MF-R075-AP and MF-R075-AP-17?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The differences are packaging format (Cut Tape vs. Tape & Box) and certifications. MF-R075-AP-17 includes additional UL and cUL approvals. Selection depends on packaging requirements and supply chain availability.

Q: Is MF-RX075/72-AP-17 compatible with 60V circuits?

A: Yes. The 72V maximum voltage rating is backward compatible with 60V applications. All other electrical parameters including hold current, trip current, and time to trip are identical. The higher voltage rating provides additional safety margin in overvoltage conditions.

Q: How does the Littelfuse 60R075XU differ from the Bourns MF-R075-AP-99?

A: The 60R075XU matches the core electrical specifications and physical form factor. The initial resistance (Ri) is specified at 250 mOhms minimum compared to 180 mOhms for the Bourns part. This difference may result in slightly higher voltage drop during normal operation. Physical dimensions are similar with minor variations in diameter and seated height. Both parts are ROHS3 compliant and carry cURus and TUV certifications.

Q: What packaging options are available for substitutes?

A: MF-R075-AP is supplied in Cut Tape (CT) format. MF-R075-AP-17 and MF-RX075/72-AP-17 are supplied in Tape & Box (TB) format. The Littelfuse 60R075XU is supplied in Bulk packaging. Selection depends on assembly process requirements and component handling procedures.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the environmental requirements of the original MF-R075-AP-99.