MU18-8FLK Equivalent & Substitute Parts

Part Overview

The MU18-8FLK is a spade terminal connector manufactured by 3M, designed for crimp termination of 18-22 AWG wire onto an 8 stud. This non-insulated terminal operates as a spring snap connector in free-hanging, in-line configurations. The part is currently active in production and maintains full RoHS compliance with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in applications where the primary part is unavailable or when alternative packaging or compliance certifications are required.

Substiute Parts

MU18-8FLK

3MIn Stock: 1230MU18-8FLK Datasheet

Current PartRFQ

53831-2

TE Connectivity AMP ConnectorsIn Stock: 1967253831-2 Datasheet

MFR RecommendedRFQ

P18-8LF-M

Panduit CorpIn Stock: 1200P18-8LF-M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MU18-8FLK is determined by strict alignment of the following parameters:

• Stud Size: Must be 8 stud (non-negotiable for mechanical fit)
• Wire Gauge Compatibility: Must accommodate 18-22 AWG minimum; 16-22 AWG is acceptable as it encompasses the original range
• Terminal Type: Must be spring snap configuration
• Mounting Type: Must be free-hanging, in-line
• Termination Method: Must be crimp
• Insulation Status: Must be non-insulated
• Contact Finish: Tin plating required
• Compliance: RoHS compliance required; REACH status acceptable if unaffected or vendor-defined

The two identified substitutes meet these criteria with minor dimensional variations that do not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

MU18-8FLK (3M Scotchlok™): Primary choice when original specification and butted seam construction are required. RoHS compliant with REACH unaffected status. Bulk packaging suitable for high-volume assembly operations.

53831-2 (TE Connectivity Solistrand): Acceptable substitute with expanded wire gauge range (16-22 AWG) and brazed seam construction with serrated termination. ROHS3 compliant. Highest inventory availability (19,657 pcs) supports rapid procurement. Phosphor bronze contact material provides alternative metallurgy. Cut tape packaging suitable for automated pick-and-place operations. REACH status vendor-defined requires confirmation for regulated applications.

P18-8LF-M (Panduit Pan-Term®): Direct equivalent with matching 18-22 AWG wire gauge and copper contact material. ROHS3 compliant with REACH unaffected status. Brazed seam construction. Bulk packaging. MSL rating not applicable. Suitable for applications requiring exact wire gauge specification match.

All three parts maintain 8 stud configuration, spring snap terminal type, crimp termination, free-hanging in-line mounting, non-insulated construction, and tin contact finish. Selection between substitutes depends on packaging requirements, contact material preference, wire gauge tolerance, and regulatory compliance documentation needs.

Frequently Asked Questions (FAQ)

Q: Can 53831-2 replace MU18-8FLK in all applications? A: Yes, for applications accepting 16-22 AWG wire. The expanded lower gauge limit (16 AWG vs. 18 AWG) does not restrict compatibility with 18-22 AWG wire. Dimensional variations (width 0.244" vs. 0.300", length 0.637" vs. 0.680") are minor and do not affect stud engagement or crimp performance. Brazed seam and serrated termination provide equivalent or superior mechanical properties compared to butted seam construction.

Q: What is the difference between butted seam and brazed seam construction? A: Both seam types create the terminal body. Butted seam (MU18-8FLK) joins edges without additional material. Brazed seam (53831-2, P18-8LF-M) uses brazing material to join edges, typically providing enhanced structural integrity. For 18-22 AWG crimp applications, both constructions meet functional requirements.

Q: Does packaging type affect electrical performance? A: No. Bulk and cut tape packaging are logistics and assembly process considerations only. Electrical and mechanical performance of the terminal itself is identical regardless of packaging format.

Q: Is REACH vendor-defined status acceptable for 53831-2? A: REACH vendor-defined status indicates the manufacturer has not completed full REACH compliance documentation. For applications in REACH-regulated regions, confirmation with TE Connectivity is required. MU18-8FLK and P18-8LF-M both carry REACH unaffected status, eliminating this requirement.

Q: Can these terminals be used interchangeably in existing assemblies? A: Yes, provided the assembly design accommodates the dimensional tolerances listed in the parameter comparison table. Stud size (8 stud), wire gauge range (18-22 AWG minimum), and terminal type (spring snap) are identical across all three parts, ensuring mechanical and electrical compatibility.

Q: What contact material should be selected? A: Copper (MU18-8FLK, P18-8LF-M) and phosphor bronze (53831-2) are both acceptable for tin-plated spade terminals in standard electrical applications. Contact material selection depends on application-specific corrosion resistance or conductivity requirements not specified in this comparison.