MF-NSML450-2 Equivalent & Substitute Parts

Part Overview

The MF-NSML450-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 6V maximum voltage with 4.5A hold current. This component is designed for surface mount applications in the 1206 (3216 Metric) package format with a concave profile. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. Substitute parts must maintain electrical performance characteristics and mechanical compatibility to ensure proper circuit protection functionality.

Substiute Parts

MF-NSML450-2

Bourns Inc.In Stock: 875MF-NSML450-2 Datasheet

Current PartRFQ

MF-NSML450/6-2

Bourns Inc.In Stock: 4258MF-NSML450/6-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-NSML450-2 is determined by strict equivalence across the following critical parameters:

• Voltage rating: 6V maximum
• Hold current (Ih): 4.5A maximum
• Trip current (It): 9A
• Maximum current capacity: 50A
• Time to trip: 2 seconds
• Operating temperature range: -40°C to 85°C
• Package format: 1206 (3216 Metric) with concave profile
• Surface mount configuration
• Regulatory certifications: cURus and TUV approval
• RoHS3 compliance

The substitute part MF-NSML450/6-2 meets all these criteria and is classified as a direct equivalent within the Bourns Multifuse® product family.

Parameter Comparison

Engineering Selection Recommendations

The MF-NSML450/6-2 is the direct substitute for the obsolete MF-NSML450-2. Both components are manufactured by Bourns Inc. and maintain identical electrical specifications and mechanical dimensions. The substitute part carries active product status, ensuring continued availability and manufacturing support. Both parts hold cURus and TUV regulatory approvals and comply with ROHS3 requirements, meeting the same compliance framework. The MF-NSML450/6-2 is suitable for direct replacement in applications currently using the MF-NSML450-2 without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can the MF-NSML450/6-2 be used as a direct replacement for the MF-NSML450-2?

A: Yes. Both parts share identical electrical ratings (6V, 4.5A hold current, 9A trip current), operating temperature range, and mechanical package specifications (1206 concave). The substitute part is manufactured by the same supplier and carries equivalent regulatory certifications.

Q: What is the difference between the MF-NSML450-2 and MF-NSML450/6-2?

A: The primary difference is product status. The MF-NSML450-2 is obsolete, while the MF-NSML450/6-2 is active. The initial resistance (Ri) differs slightly (1 mOhms vs. 2 mOhms minimum) and the maximum thickness varies (1.20mm vs. 1.00mm), but all critical electrical and thermal parameters remain equivalent.

Q: Are there any package or mounting considerations when substituting these parts?

A: No. Both components use identical 1206 (3216 Metric) concave surface mount packages with matching footprints and solder pad configurations. PCB layout and assembly processes require no modification.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the MF-NSML450-2 and MF-NSML450/6-2 carry cURus and TUV approvals and comply with ROHS3 standards. Moisture sensitivity level is identical at 2A (4 Weeks).

Q: Why should I transition from the obsolete part to the active substitute?

A: The MF-NSML450/6-2 is actively manufactured and supported by Bourns Inc., ensuring long-term availability and supply chain stability. The obsolete MF-NSML450-2 faces potential discontinuation and sourcing constraints.