MF-NSML380/6-2 Polymeric PTC Resettable Fuse Equivalent & Substitute Parts

Part Overview

The MF-NSML380/6-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc. in the Multifuse® series. This surface mount component is designed for overcurrent protection in 6V applications with a 3.8A hold current rating. The part is currently Active in product status and maintains full inventory availability. Substitute parts may be required due to voltage specification requirements, application redesign, or supply chain considerations while maintaining equivalent mechanical and electrical performance within the allowed parameter range.

Substiute Parts

MF-NSML380/6-2

Bourns Inc.In Stock: 1041MF-NSML380/6-2 Datasheet

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MF-NSML380/12-2

Bourns Inc.In Stock: 3861MF-NSML380/12-2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The MF-NSML380/12-2 qualifies as a direct substitute based on the following allowed substitution parameters:

Identical Parameters:

• Manufacturer: Bourns Inc.
• Series: Multifuse®, MF-NSML/X
• Type: Polymeric
• Current - Hold (Ih) (Max): 3.8 A
• Current - Trip (It): 7.6 A
• Current - Max: 50 A
• Time to Trip: 5 s
• Resistance - Initial (Ri) (Min): 2 mOhms
• Resistance - Post Trip (R1) (Max): 20 mOhms
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 1206 (3216 Metric), Concave
• Size / Dimension: 0.128" L x 0.063" W (3.25mm x 1.60mm)
• Thickness (Max): 0.055" (1.40mm)
• Approval Agency: cURus, TUV
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 2A (4 Weeks)
• REACH Status: REACH Unaffected
• Product Status: Active

Differing Parameter:

• Voltage - Max: 12V (versus 6V in MF-NSML380/6-2)

The voltage rating difference represents the only electrical parameter variation. The substitute part maintains all other mechanical and electrical specifications, allowing it to function in applications where the higher voltage rating is compatible with the circuit design.

Parameter Comparison

Engineering Selection Recommendations

Both the MF-NSML380/6-2 and MF-NSML380/12-2 maintain Active product status with full regulatory compliance. Both components carry cURus and TUV approvals, ROHS3 compliance, and REACH Unaffected status. Selection between these parts depends solely on circuit voltage requirements. The MF-NSML380/6-2 is specified for 6V maximum applications, while the MF-NSML380/12-2 is rated for 12V maximum applications. Component selection must align with the actual operating voltage of the target circuit. Both parts are available in production quantities with equivalent lead times and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can MF-NSML380/12-2 be used in place of MF-NSML380/6-2?

A: The MF-NSML380/12-2 can be used as a substitute only if the circuit operates at or below 6V. The 12V rating indicates the component is rated for higher voltage operation, but it will function correctly in lower voltage applications. Circuit voltage must not exceed the component's maximum rating.

Q: Are the mechanical dimensions identical between these parts?

A: Yes. Both parts use the 1206 (3216 Metric) package with identical dimensions of 0.128" L x 0.063" W (3.25mm x 1.60mm) and maximum thickness of 0.055" (1.40mm). They are mechanically interchangeable on PCB layouts.

Q: Do both parts have the same hold current and trip current specifications?

A: Yes. Both MF-NSML380/6-2 and MF-NSML380/12-2 maintain identical current specifications: 3.8A hold current (Ih), 7.6A trip current (It), and 50A maximum current rating. The time to trip is 5 seconds for both parts.

Q: What is the difference in initial and post-trip resistance between these parts?

A: There is no difference. Both parts specify 2 mOhms minimum initial resistance (Ri) and 20 mOhms maximum post-trip resistance (R1).

Q: Are both parts RoHS compliant?

A: Yes. Both MF-NSML380/6-2 and MF-NSML380/12-2 are ROHS3 Compliant with REACH Unaffected status.

Q: What is the moisture sensitivity level for these components?

A: Both parts are rated MSL 2A (4 Weeks), indicating they require controlled storage conditions and have a 4-week floor life after moisture barrier bag opening.

Q: Can these parts be used interchangeably in all applications?

A: No. Substitution is only valid when the circuit voltage specification is compatible with the substitute part's rating. The MF-NSML380/12-2 has a higher voltage rating and should only be used if the application voltage requirement permits it.