MF-NSML350/6-2 Equivalent & Substitute Parts

Part Overview

The MF-NSML350/6-2 is a polymeric PTC resettable fuse manufactured by Bourns Inc. in the Multifuse® series. This surface mount component is rated for 6V maximum voltage with a 4.6A hold current and is housed in a 1206 (3216 Metric) package. The part is active in production status and carries ROHS3 compliance with cURus and TUV approvals. Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed specifications for this product category, enabling direct replacement in circuit designs where voltage, current ratings, and package dimensions are compatible.

Substiute Parts

MF-NSML350/6-2

Bourns Inc.In Stock: 771MF-NSML350/6-2 Datasheet

Current PartRFQ

MF-NSML350/12-2

Bourns Inc.In Stock: 12599MF-NSML350/12-2 Datasheet

UpgradeRFQ

PTSLR12066V350

Eaton - Electronics DivisionIn Stock: 2254PTSLR12066V350 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MF-NSML350/6-2 are identified based on strict alignment of electrical and mechanical parameters. The primary substitution criteria are:

Electrical Parameters: Voltage rating, hold current (Ih), trip current (It), maximum current, time to trip, initial resistance, and post-trip resistance must remain within compatible ranges to ensure circuit protection function is maintained.

Mechanical Parameters: Package type (1206/3216 Metric), mounting type (Surface Mount), and physical dimensions must be compatible with existing PCB layouts.

Compliance & Certifications: Parts must maintain equivalent regulatory approvals (cURus, TUV) and RoHS compliance status.

The MF-NSML350/12-2 is classified as an upgrade substitute due to its higher voltage rating (12V vs. 6V), while maintaining identical current ratings and package specifications. The PTSLR12066V350 from Eaton is classified as a similar substitute, matching the 6V voltage and 4.6A hold current specifications with equivalent package and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

MF-NSML350/12-2 (Upgrade Substitute): This part maintains all electrical characteristics of the main part while providing a higher voltage rating of 12V. It is suitable for applications where circuit voltage may exceed 6V but current protection requirements remain at 4.6A hold current. Both parts share identical package specifications and regulatory approvals, ensuring PCB compatibility and compliance continuity.

PTSLR12066V350 (Similar Substitute): This Eaton component matches the 6V voltage and 4.6A hold current of the main part. Minor variations exist in initial resistance (3 mOhms vs. 2 mOhms) and post-trip resistance (18 mOhms vs. 22 mOhms), with a slightly lower maximum thickness (0.047" vs. 0.055"). The part carries equivalent regulatory approvals and ROHS3 compliance, supporting direct substitution in 6V applications where these resistance tolerances are acceptable.

Frequently Asked Questions (FAQ)

Q: Can MF-NSML350/12-2 be used as a direct replacement for MF-NSML350/6-2?

A: MF-NSML350/12-2 is an upgrade substitute suitable for applications where the circuit voltage may reach 12V. If your circuit operates at 6V or below, both parts provide equivalent protection. The higher voltage rating does not affect performance in lower-voltage circuits. Package dimensions and current ratings are identical, ensuring PCB compatibility.

Q: What are the key differences between MF-NSML350/6-2 and PTSLR12066V350?

A: Both parts are rated for 6V and 4.6A hold current with identical trip current and maximum current specifications. The PTSLR12066V350 has slightly higher initial resistance (3 mOhms vs. 2 mOhms) and lower post-trip resistance (18 mOhms vs. 22 mOhms). Physical dimensions are nearly identical, with the Eaton part being 0.008" thinner. Both carry cURus and TUV approvals.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All three parts use the 1206 (3216 Metric) surface mount package with concave configuration. Dimensions are within 0.002" tolerance for length and width. The PTSLR12066V350 is 0.008" thinner, which does not affect standard PCB assembly processes.

Q: Do substitute parts maintain the same regulatory compliance?

A: Yes. All parts listed are ROHS3 compliant and carry cURus and TUV approvals. Moisture sensitivity level is 2A (4 Weeks) for all parts, ensuring equivalent handling and storage requirements.

Q: Which substitute should I select for a 12V circuit?

A: MF-NSML350/12-2 is the appropriate selection for 12V circuits, as it is rated for 12V maximum voltage while maintaining the same 4.6A hold current and package specifications as the main part.