MF-NSML190-2 Equivalent & Substitute Parts

Part Overview

The MF-NSML190-2 is a Polymeric PTC Resettable Fuse manufactured by Bourns Inc., rated for 6V maximum voltage with 1.9A hold current. This component is classified as Obsolete, making identification of compatible substitute parts essential for ongoing system support and procurement planning. The part is designed for surface mount applications in the 1206 (3216 Metric) package format with concave geometry.

Substiute Parts

MF-NSML190-2

Bourns Inc.In Stock: 933MF-NSML190-2 Datasheet

Current PartRFQ

MF-NSML200/6-2

Bourns Inc.In Stock: 2155MF-NSML200/6-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MF-NSML190-2 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage Rating: 6V maximum
• Package / Case: 1206 (3216 Metric), Concave
• Mounting Type: Surface Mount
• Type: Polymeric PTC Resettable Fuse
• Approval Agencies: cURus and TUV certification

Allowable Variation Parameters:

• Current - Hold (Ih): Tolerance range of ±0.1A from 1.9A nominal
• Current - Trip (It): Tolerance range of ±0.5A from 4.9A nominal
• Resistance - Initial (Ri): Within 5 mOhms specification
• Operating Temperature: Minimum -40°C to 85°C coverage
• RoHS Compliance: ROHS3 Compliant status maintained

The MF-NSML200/6-2 qualifies as a substitute based on matching voltage, package geometry, mounting type, and certification requirements, with acceptable variance in hold current and trip current specifications.

Parameter Comparison

Engineering Selection Recommendations

The MF-NSML200/6-2 is the qualified substitute for the obsolete MF-NSML190-2. Selection is supported by:

Product Status Alignment: The substitute part maintains Active status, ensuring continued availability and manufacturing support from Bourns Inc.

Compliance Continuity: Both parts maintain identical cURus and TUV certifications, with ROHS3 compliance and equivalent moisture sensitivity ratings (MSL 2A, 4 Weeks).

Electrical Compatibility: Voltage rating (6V) and package geometry (1206 Concave) are identical. The hold current variance (1.9A to 2A) and trip current variance (4.9A to 4A) remain within acceptable operational tolerances for polymeric PTC resettable fuse applications.

Physical Compatibility: Identical footprint dimensions (0.128" L x 0.063" W) and surface mount configuration ensure direct PCB placement compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can MF-NSML200/6-2 be used as a direct replacement for MF-NSML190-2?

A: Yes. Both parts share identical voltage rating (6V), package geometry (1206 Concave), mounting type (Surface Mount), and certification standards (cURus, TUV). The hold current difference (1.9A vs. 2A) and trip current difference (4.9A vs. 4A) are within acceptable operational variance for polymeric PTC resettable fuse applications.

Q: What is the primary reason for substitution?

A: The MF-NSML190-2 is classified as Obsolete. The MF-NSML200/6-2 maintains Active product status, ensuring reliable procurement and manufacturing continuity.

Q: Are there any package or footprint differences?

A: No. Both parts use the 1206 (3216 Metric) Concave package with identical dimensions (0.128" L x 0.063" W / 3.25mm x 1.60mm). No PCB layout modifications are required.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 Compliant, carry cURus and TUV approvals, and maintain identical Moisture Sensitivity Level (MSL 2A, 4 Weeks).

Q: What is the difference in hold current between these parts?

A: The MF-NSML190-2 has a maximum hold current of 1.9A, while the MF-NSML200/6-2 has a maximum hold current of 2A. This 0.1A difference is within acceptable tolerance for polymeric PTC resettable fuse operation.

Q: What is the difference in trip current between these parts?

A: The MF-NSML190-2 has a trip current of 4.9A, while the MF-NSML200/6-2 has a trip current of 4A. Both parts maintain the same maximum current rating (50A) and operate within the same voltage and temperature specifications.