MF-PSML350-2 Equivalent & Substitute Parts

Part Overview

The MF-PSML350-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 6V maximum voltage with 4.6A hold current. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing design support and procurement continuity. The part is designed for surface mount applications in the 0805 (2012 Metric) package format with concave configuration.

Substiute Parts

MF-PSML350-2

Bourns Inc.In Stock: 885MF-PSML350-2 Datasheet

Current PartRFQ

MF-PSML350/8-2

Bourns Inc.In Stock: 3831MF-PSML350/8-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-PSML350-2 is determined by the following critical parameters:

• Voltage Rating: The substitute must support the maximum voltage requirement of 6V or higher
• Current - Hold (Ih): The substitute must maintain a 4.6A hold current specification
• Current - Trip (It): The substitute must trip at 7A
• Package Format: The substitute must use the 0805 (2012 Metric) surface mount package
• Polymeric Type: The substitute must be a Polymeric PTC resettable fuse
• Operating Temperature Range: The substitute must support -40°C to 85°C operation

The MF-PSML350/8-2 meets all substitution criteria while offering improved product status and enhanced electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MF-PSML350/8-2 is a direct functional substitute for the obsolete MF-PSML350-2. Selection is based on the following engineering factors:

• Product Status: The MF-PSML350/8-2 is Active, ensuring long-term availability and supply chain continuity compared to the Obsolete status of the original part
• Regulatory Compliance: Both parts maintain ROHS3 compliance. The substitute adds cUL certification in addition to existing cURus and TUV approvals, providing expanded regulatory coverage
• Electrical Performance: The substitute maintains identical hold current (4.6A), trip current (7A), and trip time (5s) specifications. The higher voltage rating (8V vs 6V) is suitable for 6V circuit applications
• Resistance Characteristics: The substitute offers improved initial and post-trip resistance values, resulting in lower power dissipation during normal operation and fault conditions
• Package Compatibility: Identical 0805 (2012 Metric) concave surface mount package ensures direct PCB layout compatibility

Frequently Asked Questions (FAQ)

Q: Can MF-PSML350/8-2 be used in place of MF-PSML350-2?

A: Yes. The MF-PSML350/8-2 meets all functional requirements for the MF-PSML350-2 application. The higher voltage rating (8V) is suitable for circuits designed for 6V operation. Hold current, trip current, and trip time specifications are identical.

Q: What is the difference in voltage rating between these parts?

A: The MF-PSML350-2 is rated for 6V maximum, while the MF-PSML350/8-2 is rated for 8V maximum. The higher rating of the substitute provides additional voltage margin and is compatible with 6V circuit designs.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 0805 (2012 Metric) concave surface mount package with identical footprint dimensions (0.085" L x 0.053" W / 2.15mm x 1.35mm). Direct PCB layout substitution is possible without redesign.

Q: What certifications apply to the substitute part?

A: The MF-PSML350/8-2 carries cUL, cURus, and TUV approvals. The original MF-PSML350-2 carries cURus and TUV approvals. The substitute provides expanded certification coverage.

Q: How do the resistance specifications compare?

A: The MF-PSML350/8-2 offers lower initial resistance (2 mOhms vs 3 mOhms) and lower post-trip resistance (18 mOhms vs 25 mOhms), resulting in reduced power dissipation during normal operation and fault conditions.

Q: Is the substitute part actively manufactured?

A: Yes. The MF-PSML350/8-2 is classified as Active, ensuring ongoing availability. The original MF-PSML350-2 is Obsolete and no longer manufactured.