Molex 0876331021 Equivalent & Substitute Parts

Part Overview

The Molex 0876331021 is a 45-position backplane connector receptacle featuring female sockets and blade sockets for through-hole PCB mounting. Part of the EXTreme PowerPlus 87633 series, this connector is designed for applications requiring mixed signal and power distribution with a 0.100" (2.54mm) pitch across 4 rows. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support, maintenance, and new design implementations where legacy compatibility is required.

Substiute Parts

0876331021

MolexIn Stock: 10240876331021 Datasheet

Current PartRFQ

51750-070LF

Amphenol ICC (FCI)In Stock: 104351750-070LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0876331021 is determined by strict alignment of the following critical parameters:

Position Count & Pitch: The substitute must maintain 45 positions at 0.100" (2.54mm) pitch to ensure PCB footprint compatibility and mating interface alignment.

Connector Configuration: The substitute must provide receptacle configuration with female sockets and blade sockets to maintain electrical and mechanical compatibility with existing mating connectors.

Mounting & Termination: Through-hole mounting with press-fit termination is required to match the original PCB assembly process and mechanical retention.

Contact Layout: The 32 signal and 13 power contact distribution must be preserved to maintain circuit functionality and power distribution architecture.

Contact Finish & Specifications: Gold plating at 30.0µin (0.76µm) thickness ensures equivalent electrical performance and corrosion resistance.

Environmental & Compliance: Operating temperature range of -20°C ~ 105°C, UL94 V-0 flammability rating, and MSL 1 classification must be maintained for equivalent reliability and regulatory compliance.

The Amphenol ICC (FCI) 51750-070LF meets all these criteria and is identified as the manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

The Amphenol ICC (FCI) 51750-070LF is the qualified substitute for the obsolete Molex 0876331021. Both connectors share identical electrical and mechanical specifications across all critical parameters: 45-position configuration, 0.100" pitch, 4-row layout, through-hole press-fit termination, and equivalent contact finish specifications.

The substitute maintains full compliance with UL94 V-0 flammability requirements and operates within the identical temperature range of -20°C ~ 105°C. Both parts carry MSL 1 classification, indicating unlimited shelf life under standard storage conditions.

The primary distinction is product status: the original Molex part is obsolete, while the Amphenol ICC (FCI) 51750-070LF is active production. The substitute's active status ensures ongoing availability for replacement, repair, and new design implementations. RoHS compliance is maintained across both parts, with the substitute designated as RoHS Compliant.

Frequently Asked Questions (FAQ)

Q: Will the Amphenol ICC (FCI) 51750-070LF fit the same PCB footprint as the Molex 0876331021?

A: Yes. Both connectors maintain identical 45-position configuration with 0.100" (2.54mm) pitch across 4 rows. Through-hole press-fit termination is identical, ensuring direct PCB footprint compatibility.

Q: Are the contact layouts equivalent between these two parts?

A: Yes. Both connectors feature identical 32 signal and 13 power contact distribution, maintaining circuit functionality and power distribution architecture.

Q: What is the difference in contact finish between the two parts?

A: The Molex 0876331021 specifies gold contact finish at 30.0µin (0.76µm) thickness. The Amphenol ICC (FCI) 51750-070LF offers gold or gold with GXT™ finish at the same thickness specification. Both finishes meet the electrical performance and corrosion resistance requirements.

Q: Are there any compliance or certification differences?

A: Both parts meet UL94 V-0 flammability requirements and operate across the identical temperature range of -20°C ~ 105°C. The Molex part is ROHS3 Compliant, while the Amphenol ICC (FCI) part is RoHS Compliant. Both carry MSL 1 classification.

Q: What packaging is available for the substitute part?

A: The Amphenol ICC (FCI) 51750-070LF is supplied in Tray packaging, compared to the original part's unspecified packaging format.

Q: Why should I select the Amphenol ICC (FCI) 51750-070LF over the obsolete Molex part?

A: The substitute is in active production, ensuring reliable long-term availability for replacement, repair, and new design implementations. It maintains identical electrical and mechanical specifications while offering equivalent compliance and environmental ratings.