MF-SM260-2 Equivalent & Substitute Parts

Part Overview

The MF-SM260-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc., rated for 6V maximum voltage with a 2.6A hold current. This component is designed for overcurrent protection in surface mount applications and is currently in active production status. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or specific certification requirements.

Substiute Parts

MF-SM260-2

Bourns Inc.In Stock: 3103MF-SM260-2 Datasheet

Current PartRFQ

SMD260F-2

Littelfuse Inc.In Stock: 1428SMD260F-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-SM260-2 is determined by the following critical parameters:

• Voltage rating of 6V maximum
• Hold current (Ih) of 2.6A maximum
• Trip current (It) of 5.2A
• Time to trip of 20 seconds
• Initial resistance (Ri) minimum of 25 mOhms
• Post-trip resistance (R1) maximum of 75 mOhms
• Surface mount 2-SMD package configuration
• Operating temperature range of -40°C to 85°C
• ROHS3 compliance

The SMD260F-2 from Littelfuse Inc. meets all critical electrical and mechanical parameters required for direct substitution in the same application context.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-SM260-2 and SMD260F-2 are active production components with ROHS3 compliance. The MF-SM260-2 carries cURus and TUV certifications with MSL 1 rating, indicating unlimited moisture sensitivity protection. The SMD260F-2 carries CSA, TUV, and UL certifications with MSL 2A rating, requiring controlled storage conditions of 4 weeks maximum exposure.

Selection between these parts should be based on certification requirements specific to the end application and available inventory. Both components satisfy identical electrical performance parameters and mechanical package specifications within stated tolerances.

Frequently Asked Questions (FAQ)

Q: Can SMD260F-2 directly replace MF-SM260-2 in production?

A: Yes, the SMD260F-2 meets all critical electrical parameters (voltage, hold current, trip current, resistance values, and time to trip) and shares the same 2-SMD package configuration. Physical dimensions are within acceptable tolerance for PCB layout compatibility.

Q: What is the difference in moisture sensitivity between these parts?

A: The MF-SM260-2 has MSL 1 rating (unlimited moisture protection), while the SMD260F-2 has MSL 2A rating (4-week maximum exposure). Storage and handling procedures must account for this difference if substituting the Littelfuse component.

Q: Are the certifications equivalent?

A: Both parts carry TUV certification. The MF-SM260-2 includes cURus approval, while the SMD260F-2 includes CSA and UL approvals. Certification selection depends on regional regulatory requirements for the end application.

Q: Will the slight dimensional difference affect PCB assembly?

A: The dimensional variance (0.003" length difference, 0.012" width difference) is within standard PCB design tolerances for 2-SMD packages and does not require layout modification.