Equivalent & Substitute Parts for MF-RX185-0-14

Part Overview

The Bourns MF-RX185-0-14 is a polymeric PTC resettable fuse rated at 60V, 1.85A hold current, designed for through-hole radial mounting in disc configuration. This component is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts offer compatible performance within defined parameter tolerances for this product category.

Substiute Parts

MF-RX185-0-14

Bourns Inc.In Stock: 949MF-RX185-0-14 Datasheet

Current PartRFQ

MF-RX185-005

Bourns Inc.In Stock: 983MF-RX185-005 Datasheet

Parametric EquivalentRFQ

MF-RX185/72-0

Bourns Inc.In Stock: 4253MF-RX185/72-0 Datasheet

Parametric EquivalentRFQ

MF-RX185/72-0-14

Bourns Inc.In Stock: 16375MF-RX185/72-0-14 Datasheet

Parametric EquivalentRFQ

60R185XF

LittelfuseIn Stock: 448160R185XF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-RX185-0-14 is determined by the following critical parameters:

Parametric Equivalents (Identical Electrical & Mechanical Specifications):

• Voltage - Max: 60V
• Current - Hold (Ih) (Max): 1.85 A
• Current - Trip (It): 3.7 A
• Resistance - Initial (Ri) (Min): 80 mOhms
• Resistance - Post Trip (R1) (Max): 190 mOhms
• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Lead Spacing: 0.201" (5.10mm)

Similar Substitutes (Cross-Manufacturer Equivalents):

• Voltage - Max: 60V
• Current - Hold (Ih) (Max): 1.85 A
• Current - Trip (It): 3.7 A
• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Lead Spacing: 0.201" (5.10mm)

Higher Voltage Variants (Same Current Rating, Different Voltage Class):

• Current - Hold (Ih) (Max): 1.85 A
• Current - Trip (It): 3.7 A
• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Lead Spacing: 0.201" (5.10mm)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MF-RX185-005

The MF-RX185-005 is the direct parametric equivalent to the obsolete MF-RX185-0-14. All electrical and mechanical specifications are identical, including voltage rating (60V), current ratings (1.85A hold, 3.7A trip), resistance characteristics, and physical dimensions. This part carries active product status from Bourns Inc., ensuring ongoing availability and supply chain continuity. Compliance certifications (cURus, TUV), RoHS3 status, and regulatory classifications (REACH Unaffected, EAR99) are identical to the original part.

Secondary Recommendation: 60R185XF (Littelfuse)

The Littelfuse 60R185XF provides cross-manufacturer equivalence with identical electrical performance and mechanical compatibility. This part maintains the same 60V voltage rating, 1.85A hold current, and 3.7A trip current specifications. Physical dimensions and lead spacing are compatible with the original design. The part is active and carries equivalent regulatory compliance (cURus, TUV, ROHS3, REACH Unaffected, EAR99). Selection of this alternative provides supply diversification from a second qualified manufacturer.

Alternative Consideration: MF-RX185/72-0-14 or MF-RX185/72-0

The 72V variants (MF-RX185/72-0-14 and MF-RX185/72-0) maintain identical current ratings and all other electrical characteristics but operate at a higher voltage class (72V vs. 60V). These parts are suitable only for applications where the circuit voltage does not exceed 60V, as the higher voltage rating does not provide additional protection at lower voltages. Both variants are active products with full regulatory compliance. Selection should be based on circuit voltage requirements and design margin considerations.

Frequently Asked Questions (FAQ)

Q: Can MF-RX185-005 be used as a direct replacement for MF-RX185-0-14?

A: Yes. The MF-RX185-005 is a parametric equivalent with identical electrical specifications (60V, 1.85A hold current, 3.7A trip current), resistance characteristics, and physical dimensions. All certifications and compliance ratings are equivalent. This is the recommended replacement for the obsolete MF-RX185-0-14.

Q: What is the difference between MF-RX185-005 and the 72V variants?

A: The MF-RX185-005 is rated at 60V maximum voltage, while MF-RX185/72-0-14 and MF-RX185/72-0 are rated at 72V. All other electrical parameters (current ratings, resistance, trip time) are identical. The 72V variants are suitable only for circuits operating at or below 60V; the higher voltage rating does not provide additional circuit protection at lower voltages.

Q: Is the Littelfuse 60R185XF compatible with the original design?

A: Yes. The 60R185XF maintains identical electrical specifications (60V, 1.85A hold current, 3.7A trip current) and physical dimensions with compatible lead spacing (0.201" / 5.10mm). This cross-manufacturer equivalent provides supply diversification while maintaining full design compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (MF-RX185-005, MF-RX185/72-0-14, MF-RX185/72-0, and 60R185XF) are ROHS3 compliant with MSL rating of 1 (Unlimited). Regulatory classifications (REACH Unaffected, EAR99, HTSUS 8533.40.8070) are consistent across all parts.

Q: What is the lead spacing requirement for PCB layout?

A: All substitute parts maintain a lead spacing of 0.201" (5.10mm), matching the original MF-RX185-0-14. PCB footprints designed for the original part are compatible with all listed substitutes without modification.

Q: Why is the original MF-RX185-0-14 marked as obsolete?

A: The MF-RX185-0-14 has been discontinued by Bourns Inc. The active equivalent MF-RX185-005 provides identical performance and specifications for ongoing design support and procurement.