Molex 0878314428 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The Molex 0878314428 is an active-status rectangular connector header designed for through-hole board-to-board applications. This 44-position, 2-row connector with 2.00mm pitch operates across -55°C to 105°C and features shrouded 4-wall construction with solder termination. The connector is specified for automotive, general purpose, and telecommunications applications. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when design requirements necessitate alternative connector geometries or insulation materials.

Substiute Parts

0878314428

MolexIn Stock: 9640878314428 Datasheet

Current PartRFQ

LTMM-122-01-L-D

Samtec Inc.In Stock: 1170LTMM-122-01-L-D Datasheet

MFR RecommendedRFQ

LTMM-122-02-S-D

Samtec Inc.In Stock: 1012LTMM-122-02-S-D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0878314428 is determined by strict alignment of the following critical parameters:

• Connector Type: Header (male pin contact orientation)
• Position Count & Row Configuration: 44 positions in 2-row arrangement
• Pitch Specification: 0.079" (2.00mm) mating pitch with 0.079" (2.00mm) row spacing
• Mounting & Termination: Through-hole solder termination
• Shrouding: Shrouded 4-wall construction
• Operating Temperature: -55°C to 105°C range
• Contact Material & Finish: Phosphor bronze with gold mating surface and tin post finish
• Compliance: ROHS3 compliant, MSL 1

The substitute parts LTMM-122-01-L-D and LTMM-122-02-S-D from Samtec Inc. meet all critical substitution criteria. Variations in contact length dimensions and insulation material (Liquid Crystal Polymer vs. Polyamide) do not preclude substitution when mechanical envelope and electrical performance requirements are satisfied.

Parameter Comparison

Engineering Selection Recommendations

All three connectors maintain active product status and full ROHS3 compliance with MSL 1 rating. The Molex 0878314428 features a latch holder fastening mechanism and polyamide insulation with greater insulation height. The Samtec LTMM-122-01-L-D and LTMM-122-02-S-D employ push-pull fastening with Liquid Crystal Polymer insulation and reduced insulation height. Selection between these options depends on mechanical envelope constraints, fastening mechanism requirements, and insulation material compatibility with the target application environment. All parts share identical electrical specifications, pitch geometry, and temperature operating range, ensuring functional interchangeability within the specified parameter boundaries.

Frequently Asked Questions (FAQ)

Q: Can LTMM-122-01-L-D and LTMM-122-02-S-D be used interchangeably with the Molex 0878314428?

A: Yes, both Samtec parts meet the critical substitution criteria: 44-position, 2-row configuration with 2.00mm pitch, through-hole solder termination, shrouded 4-wall construction, and -55°C to 105°C operating range. Differences in contact length and insulation material do not prevent functional substitution when mechanical envelope and fastening mechanism compatibility are confirmed for the specific application.

Q: What is the primary difference between LTMM-122-01-L-D and LTMM-122-02-S-D?

A: The primary difference is contact length. LTMM-122-01-L-D specifies 0.100" (2.54mm) mating contact length, while LTMM-122-02-S-D specifies 0.120" (3.05mm) mating contact length. Post contact length also differs: 0.090" (2.29mm) versus 0.117" (2.97mm) respectively. Selection depends on mating depth requirements and PCB stack-up specifications.

Q: Are there electrical performance differences between the Molex and Samtec parts?

A: No. All three connectors share identical contact material (phosphor bronze), contact finish specifications (gold mating, tin post), and operating temperature range (-55°C to 105°C). Electrical performance is equivalent across all three parts.

Q: What is the impact of insulation material differences?

A: The Molex 0878314428 uses glass-filled polyamide insulation, while both Samtec parts use Liquid Crystal Polymer (LCP). LCP provides superior dimensional stability and lower moisture absorption. Material selection should align with application environmental conditions and thermal cycling requirements.

Q: Do fastening mechanism differences affect compatibility?

A: Fastening mechanism differences (latch holder vs. push-pull) affect mating and unmating procedures but do not impact electrical or functional compatibility. Connector selection should account for the mating connector type and mechanical interface requirements of the target application.

Q: Are all parts RoHS3 compliant?

A: Yes. The Molex 0878314428, LTMM-122-01-L-D, and LTMM-122-02-S-D are all ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level and REACH unaffected status.