Equivalent & Substitute Parts for MF-SM050/60-2

Part Overview

The MF-SM050/60-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc., designed for surface mount applications requiring overcurrent protection at 60V with a 500 mA hold current. This component is part of the Multifuse® MF-SM series and maintains Active product status with full AEC-Q200 automotive qualification. Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in circuit designs without functional compromise.

Substiute Parts

MF-SM050/60-2

Bourns Inc.In Stock: 3837MF-SM050/60-2 Datasheet

Current PartRFQ

MF-SM050-2

Bourns Inc.In Stock: 3052MF-SM050-2 Datasheet

Parametric EquivalentRFQ

PFSM.050.2

SCHURTER Inc.In Stock: 1863PFSM.050.2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-SM050/60-2 are classified based on strict electrical and mechanical parameter alignment. The critical parameters determining substitution eligibility are: maximum voltage rating (60V), hold current (500 mA), trip current (1 A), maximum current (40 A), time to trip (4 s), initial resistance (350 mOhms minimum), post-trip resistance (1.4 Ohms maximum), operating temperature range (-40°C to 85°C), surface mount configuration, and 2-SMD package type.

Two substitute parts meet these criteria:

Parametric Equivalent (MF-SM050-2): Identical electrical specifications and mechanical dimensions with alternative packaging format (Cut Tape & Digi-Reel® instead of Tape & Reel).

Direct Manufacturer Alternative (PFSM.050.2): SCHURTER Inc. polymeric PTC resettable fuse with matching electrical parameters and functionally equivalent mechanical dimensions within acceptable tolerance, maintaining AEC-Q200 certification and automotive-grade compliance.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status with full AEC-Q200 automotive qualification and cURus/TUV approval agency certifications. The MF-SM050-2 represents a direct parametric equivalent with identical electrical and mechanical specifications, differing only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). The PFSM.050.2 from SCHURTER Inc. provides an alternative from a different manufacturer with equivalent electrical performance and functionally compatible mechanical dimensions (length variance of 0.002" within acceptable PCB assembly tolerances). All three components are ROHS3 compliant and maintain identical operating temperature ranges and electrical protection characteristics. Selection between these parts depends on packaging availability, supply chain requirements, and procurement preferences rather than functional performance differences.

Frequently Asked Questions (FAQ)

Q: Can MF-SM050-2 be used as a direct replacement for MF-SM050/60-2?

A: Yes. Both parts are manufactured by Bourns Inc. with identical electrical parameters (60V maximum voltage, 500 mA hold current, 1 A trip current, 4 s time to trip) and mechanical dimensions (0.287" L x 0.214" W, 0.125" maximum thickness). The only difference is packaging format: MF-SM050/60-2 is supplied in Tape & Reel, while MF-SM050-2 is supplied in Cut Tape & Digi-Reel®. Both are AEC-Q200 rated and ROHS3 compliant.

Q: Is PFSM.050.2 compatible with the original MF-SM050/60-2 design?

A: Yes. The PFSM.050.2 from SCHURTER Inc. matches all critical electrical specifications (60V, 500 mA hold current, 1 A trip current, 4 s time to trip, 350 mOhms initial resistance, 1.4 Ohms post-trip resistance) and operates within the same temperature range (-40°C to 85°C). The mechanical dimensions are functionally equivalent (0.289" L x 0.214" W versus 0.287" L x 0.214" W, a 0.002" length difference within standard PCB assembly tolerances). Both components carry AEC-Q200 certification and cURus/TUV approval.

Q: What are the key parameters that determine if a substitute is acceptable?

A: Substitution eligibility is determined by: maximum voltage rating (60V), hold current specification (500 mA), trip current (1 A), maximum current capacity (40 A), time to trip (4 s), initial resistance minimum (350 mOhms), post-trip resistance maximum (1.4 Ohms), operating temperature range (-40°C to 85°C), surface mount configuration, and 2-SMD package type. All three parts meet these criteria.

Q: Does packaging format affect electrical performance?

A: No. Packaging format (Tape & Reel, Cut Tape, or Digi-Reel®) affects supply chain logistics and assembly handling but does not alter electrical characteristics or performance. All three parts deliver identical protection behavior in circuit operation.

Q: Are all substitute parts automotive-qualified?

A: Yes. All three parts carry AEC-Q200 automotive qualification ratings and are approved by cURus and TUV certification agencies, meeting automotive industry reliability and quality standards.