Bourns MF-RX110-AP PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The Bourns MF-RX110-AP is a polymeric PTC resettable fuse rated for 60V at 1.1A hold current, designed for through-hole radial mounting in disc configuration. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. Equivalent parts maintain the same electrical performance characteristics while offering active product status and improved availability.

Substiute Parts

MF-RX110-AP

Bourns Inc.In Stock: 1191MF-RX110-AP Datasheet

Current PartRFQ

MF-RX110/72-0

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

DirectRFQ

MF-RX110/72-AP

Bourns Inc.In Stock: 966MF-RX110/72-AP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-RX110-AP are identified based on the following electrical and mechanical compatibility criteria:

Maintained Parameters (Substitution Basis):

• Current - Hold (Ih) (Max): 1.1 A
• Current - Trip (It): 2.2 A
• Current - Max: 40 A
• Time to Trip: 8.2 s
• Resistance - Initial (Ri) (Min): 150 mOhms
• Resistance - Post Trip (R1) (Max): 380 mOhms
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: Radial, Disc
• Physical Dimensions: 0.427" L x 0.122" W (10.84mm x 3.10mm)
• Lead Spacing: 0.201" (5.10mm)
• Approval Agency: cURus, TUV
• RoHS Status: ROHS3 Compliant

Allowable Variation:

• Voltage - Max: 72V (higher voltage rating maintains backward compatibility in 60V applications)
• Packaging: Bulk or Tape & Box (TB) formats

The substitute parts MF-RX110/72-0 and MF-RX110/72-AP are functionally equivalent with identical hold current, trip current, and thermal characteristics. The increased voltage rating of 72V provides enhanced margin in applications originally designed for 60V operation.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production Continuity:

The MF-RX110/72-0 and MF-RX110/72-AP are direct functional equivalents to the obsolete MF-RX110-AP. Both substitute parts maintain identical electrical performance across all critical parameters: hold current, trip current, time to trip, and resistance characteristics. The 72V voltage rating provides additional safety margin compared to the original 60V specification.

Compliance and Certification:

All three parts carry identical regulatory approvals (cURus, TUV) and maintain ROHS3 compliance. No additional qualification or testing is required from a regulatory standpoint when transitioning from MF-RX110-AP to either substitute part.

Packaging Considerations:

• MF-RX110/72-0 (Bulk packaging) is suitable for high-volume manufacturing environments with established component handling procedures.
• MF-RX110/72-AP (Tape & Box packaging) is appropriate for automated assembly lines and applications requiring controlled component dispensing.

Availability:

Both substitute parts are classified as active products with confirmed inventory levels, ensuring long-term supply chain stability compared to the obsolete MF-RX110-AP.

Frequently Asked Questions (FAQ)

Q: Can MF-RX110/72-0 or MF-RX110/72-AP be used as direct replacements for MF-RX110-AP?

A: Yes. Both substitute parts are electrically and mechanically equivalent. They maintain identical hold current (1.1A), trip current (2.2A), time to trip (8.2s), and resistance characteristics. The increased voltage rating (72V vs. 60V) provides backward compatibility in 60V applications.

Q: What is the difference between MF-RX110/72-0 and MF-RX110/72-AP?

A: The parts are electrically identical. The primary difference is packaging format: MF-RX110/72-0 is supplied in bulk, while MF-RX110/72-AP is supplied in tape and box format. Selection depends on manufacturing process requirements and component handling infrastructure.

Q: Are there any thermal or performance differences between the main part and substitutes?

A: No. All three parts share identical operating temperature range (-40°C ~ 85°C), initial resistance (150 mOhms minimum), and post-trip resistance (380 mOhms maximum).

Q: Do the substitute parts require PCB layout modifications?

A: No. All parts maintain identical physical dimensions (0.427" L x 0.122" W), height (0.662" maximum), and lead spacing (0.201"). Direct PCB compatibility is maintained.

Q: Are regulatory certifications maintained with the substitute parts?

A: Yes. Both MF-RX110/72-0 and MF-RX110/72-AP carry the same approval agencies (cURus, TUV) and maintain ROHS3 compliance as the original MF-RX110-AP.