MF-LS260 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The MF-LS260 is a polymeric PTC resettable fuse manufactured by Bourns Inc. in the Multifuse® MF-LS series. This component provides overcurrent protection at 24V with a 2.6A hold current rating and is designed for strap-type mounting applications. The part is active in production with full inventory availability. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design flexibility is required within compatible electrical and mechanical parameters.

Substiute Parts

MF-LS260

Bourns Inc.In Stock: 777MF-LS260 Datasheet

Current PartRFQ

0ZSC0260FF1E

Bel Fuse Inc.In Stock: 15390ZSC0260FF1E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-LS260 are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Current - Hold (Ih) rating: 2.6 A (exact match required)
• Package / Case type: Strap (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Approval Agency certifications: cURus and TUV (required for regulatory compliance)
• RoHS Status: ROHS3 Compliant (required for environmental compliance)

Secondary Compatibility Parameters:

• Voltage - Max: May vary within application requirements
• Current - Trip (It): May vary within acceptable trip characteristics
• Resistance values (Ri and R1): May vary within acceptable circuit performance parameters
• Physical dimensions: May vary within mechanical mounting constraints

The substitute part 0ZSC0260FF1E from Bel Fuse Inc. meets all primary substitution criteria and maintains functional equivalence for overcurrent protection applications.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-LS260 and 0ZSC0260FF1E are active production parts with identical hold current ratings (2.6 A), matching operating temperature ranges (-40°C ~ 85°C), and equivalent regulatory certifications (cURus, TUV). Both components are ROHS3 compliant and REACH unaffected, meeting current environmental standards.

The primary difference is the maximum voltage rating: the MF-LS260 is rated for 24V while the 0ZSC0260FF1E is rated for 20V. Selection between these parts depends on the actual circuit voltage requirement. For applications operating at or below 20V, either part is suitable. For applications requiring 24V operation, the MF-LS260 is the appropriate choice.

Physical dimensions differ between the two parts. The MF-LS260 measures 25.00mm x 11.35mm while the 0ZSC0260FF1E measures 22.00mm x 5.20mm. Mechanical mounting space constraints must be evaluated during component selection.

Frequently Asked Questions (FAQ)

Q: Can the 0ZSC0260FF1E replace the MF-LS260 in all applications?

A: The 0ZSC0260FF1E can replace the MF-LS260 only in applications where the circuit voltage does not exceed 20V. The MF-LS260 is rated for 24V operation, while the substitute is rated for 20V maximum. Additionally, physical dimensions differ and must be verified against mechanical mounting requirements.

Q: What is the significance of the Current - Hold (Ih) rating?

A: The Current - Hold rating (2.6 A for both parts) is the maximum continuous current the fuse can carry without tripping. This parameter must match exactly between the main part and any substitute to ensure proper circuit protection.

Q: Are both parts suitable for the same temperature range?

A: Yes. Both the MF-LS260 and 0ZSC0260FF1E operate across the identical temperature range of -40°C to 85°C, ensuring thermal compatibility in equivalent applications.

Q: What certifications apply to these parts?

A: Both parts carry cURus and TUV approvals and are ROHS3 compliant. These certifications confirm regulatory compliance for safety and environmental standards.

Q: How do the resistance values differ between these parts?

A: The MF-LS260 has an initial resistance (Ri) minimum of 25 mOhms and post-trip resistance (R1) maximum of 76 mOhms. The 0ZSC0260FF1E has an initial resistance minimum of 20 mOhms and post-trip resistance maximum of 63 mOhms. These variations are within acceptable ranges for polymeric PTC resettable fuse operation.

Q: What is the difference in Current - Trip (It) ratings?

A: The MF-LS260 has a trip current of 5.2 A while the 0ZSC0260FF1E has a trip current of 5.8 A. Both maintain the same 5-second time-to-trip characteristic. The trip current difference reflects normal manufacturing variation within the polymeric PTC fuse product category.