Equivalent & Substitute Parts for MF-RX110

Part Overview

The Bourns MF-RX110 is a polymeric PTC resettable fuse rated at 60V, 1.1A hold current, designed for through-hole radial mounting in disc configuration. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MF-RX110 provides circuit protection through automatic current limiting with a trip current of 2.2A and recovery capability after fault conditions are cleared.

Substiute Parts

MF-RX110

Bourns Inc.In Stock: 936MF-RX110 Datasheet

Current PartRFQ

MF-RX110/72-0

Bourns Inc.In Stock: 3244MF-RX110/72-0 Datasheet

DirectRFQ

MF-RX110-005

Bourns Inc.In Stock: 734MF-RX110-005 Datasheet

Parametric EquivalentRFQ

0ZRC0110FF1A

Bel Fuse Inc.In Stock: 55340ZRC0110FF1A Datasheet

DirectRFQ

PTR060V0110-TR

Eaton - Electronics DivisionIn Stock: 937PTR060V0110-TR Datasheet

DirectRFQ

60R110XMR

Littelfuse Inc.In Stock: 4153560R110XMR Datasheet

SimilarRFQ

60R110XU

Littelfuse Inc.In Stock: 284860R110XU Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-RX110 is determined by the following critical parameters:

Electrical Parameters (Primary):

• Voltage - Max: 60V (minimum requirement)
• Current - Hold (Ih) (Max): 1.1 A (exact match required)
• Current - Trip (It): 2.2 A (exact match required)
• Resistance - Initial (Ri) (Min): 150 mOhms (exact match required)
• Resistance - Post Trip (R1) (Max): 380 mOhms (exact match required)
• Time to Trip: 8.2 s (exact match required)

Mechanical Parameters (Secondary):

• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Lead Spacing: 0.201" (5.10mm) (exact match required)
• Operating Temperature: -40°C ~ 85°C

Compliance Parameters:

• Approval Agency: cURus, TUV
• RoHS Status: ROHS3 Compliant

Substitute parts are categorized as follows:

Direct Equivalents: Parts with identical electrical and mechanical specifications, differing only in manufacturer or packaging format.

Parametric Equivalents: Parts with identical electrical performance and core mechanical compatibility, with minor dimensional variations that do not affect circuit board layout or functionality.

Higher Voltage Alternatives: Parts with voltage ratings exceeding 60V but matching all other electrical and mechanical parameters, suitable for applications where higher voltage margin is acceptable.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Equivalents (Identical Specifications):

MF-RX110-005 (Bourns Inc.) is the primary recommended replacement for the obsolete MF-RX110. This part maintains active product status, identical electrical parameters, and matching mechanical specifications. Both parts are ROHS3 compliant and carry cURus and TUV approvals.

60R110XU and 60R110XMR (Littelfuse Inc., POLY-FUSE® series) are functionally equivalent alternatives with active status. These parts match all critical electrical and mechanical parameters, including lead spacing and operating temperature range. Both are ROHS3 compliant with cURus and TUV certifications.

PTR060V0110-TR (Eaton - Electronics Division) is an active equivalent with matching electrical specifications. Lead spacing is 0.197" (5.00mm) versus the original 0.201" (5.10mm), representing a 0.01" tolerance variation. This part is supplied in Tape & Reel format and is ROHS3 compliant with cURus and TUV approvals.

Higher Voltage Alternative:

MF-RX110/72-0 (Bourns Inc.) provides a 72V rated alternative while maintaining all other electrical and mechanical parameters identical to the original MF-RX110. This part is suitable for applications where increased voltage margin is required. Product status is active with ROHS3 compliance and cURus/TUV approvals.

0ZRC0110FF1A (Bel Fuse Inc., 0ZRC series) offers a 90V rated option with matching electrical specifications and lead spacing. This part includes AEC-Q200 automotive qualification and is ROHS3 compliant with cURus and TUV certifications. Dimensional variations exist: length is 0.512" (13.00mm) versus 0.427" (10.84mm) and height is 0.709" (18.00mm) versus 0.662" (16.84mm).

Frequently Asked Questions (FAQ)

Q: Can MF-RX110-005 be used as a direct replacement for the obsolete MF-RX110?

A: Yes. MF-RX110-005 is a direct equivalent with identical electrical parameters (60V, 1.1A hold current, 2.2A trip current), matching resistance values, and identical mechanical specifications including lead spacing and package type. Both parts carry the same regulatory approvals and RoHS compliance status.

Q: What is the difference between the Littelfuse 60R110XU and 60R110XMR parts?

A: Both parts are electrically and mechanically identical with matching specifications for voltage, current, resistance, and lead spacing. The primary difference is packaging format: 60R110XU is supplied in Bulk packaging, while 60R110XMR is supplied in Cut Tape (CT) format. Selection depends on procurement and assembly requirements.

Q: Can the higher voltage alternatives (MF-RX110/72-0 or 0ZRC0110FF1A) be used in place of the MF-RX110?

A: Yes, both higher voltage alternatives are electrically compatible. The MF-RX110/72-0 maintains identical mechanical specifications and is the most direct upgrade path. The 0ZRC0110FF1A has larger physical dimensions and should be verified for circuit board layout compatibility before implementation.

Q: What is the significance of lead spacing differences between PTR060V0110-TR and the original MF-RX110?

A: Lead spacing differs by 0.01" (0.197" versus 0.201"). This variation is within typical PCB design tolerances and does not affect functional compatibility. However, circuit board layout should be verified to confirm the part fits existing through-hole positions without modification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. Regulatory approvals (cURus and TUV) are consistent across all recommended equivalents, ensuring compliance with applicable standards.

Q: Which substitute part has the highest inventory availability?

A: 60R110XMR (Littelfuse Inc.) has the highest inventory level at 41,461 pieces in stock, followed by 0ZRC0110FF1A (Bel Fuse Inc.) at 5,491 pieces. MF-RX110-005 (Bourns Inc.) has 674 pieces available.