Equivalent & Substitute Parts for Molex 0434590025

Part Overview

The Molex 0434590025 is a rectangular connector header designed for through-hole mounting in board-to-board or cable applications. This 18-position, 2-row connector operates at a 0.165" (4.20mm) pitch with shrouded 4-wall construction and push-pull fastening. The part is currently active in production status with 737 units in stock. Alternative parts may be required due to design phase transitions, supply chain considerations, or application-specific requirements where substitute connectors meet equivalent electrical and mechanical specifications.

Substiute Parts

0434590025

MolexIn Stock: 7600434590025 Datasheet

Current PartRFQ

1-1586585-8

TE Connectivity AMP ConnectorsIn Stock: 10081-1586585-8 Datasheet

MFR RecommendedRFQ

1-1586586-8

TE Connectivity AMP ConnectorsIn Stock: 8651-1586586-8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Molex 0434590025 are qualified based on the following critical parameters that determine functional equivalence:

• Connector geometry: 18 positions, 2 rows, 0.165" (4.20mm) pitch and row spacing
• Mounting and termination: Through-hole solder termination
• Shrouding configuration: Shrouded 4-wall design
• Contact configuration: Male pin contacts with square shape
• Insulation material compatibility: Polyamide or nylon-based materials
• Compliance standards: ROHS3 compliance and UL94 flammability rating

The substitute parts listed below maintain these core parameters, ensuring mechanical and electrical compatibility in applications designed for the Molex 0434590025.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0434590025 is the primary specification for new designs due to its active product status and UL94 V-0 flammability rating, which provides superior flame resistance compared to substitute options.

The TE Connectivity 1-1586585-8 and 1-1586586-8 are classified as obsolete products and should be considered only for legacy system maintenance or where existing designs are locked to these part numbers. Both substitute parts meet the core geometric and electrical requirements but differ in the following aspects:

• Flammability rating: Both TE Connectivity parts carry UL94 V-2 certification, which is lower than the Molex V-0 rating. Applications requiring V-0 compliance must use the Molex 0434590025.
• Contact finish: The Molex part features gold-plated mating contacts, while TE Connectivity substitutes use tin plating. Gold plating provides enhanced corrosion resistance and contact reliability in demanding environments.
• Fastening mechanism: The Molex part uses push-pull fastening, while TE Connectivity substitutes employ latch holder fastening. These are mechanically distinct and not interchangeable in mated assemblies.
• Product lifecycle: The Molex 0434590025 is actively manufactured, ensuring long-term availability and supply chain stability.

For new designs, the Molex 0434590025 is the recommended selection. Substitution with TE Connectivity parts should be limited to legacy applications where design constraints or existing inventory necessitate their use.

Frequently Asked Questions (FAQ)

Q: Can the TE Connectivity 1-1586585-8 or 1-1586586-8 be used as direct replacements for the Molex 0434590025?

A: These parts share identical pitch, row spacing, position count, and through-hole mounting configuration. However, they are not direct plug-in replacements due to differences in fastening type (push-pull versus latch holder) and contact finish (gold versus tin). Mated connector compatibility must be verified before substitution.

Q: What is the significance of the UL94 V-0 versus V-2 flammability ratings?

A: UL94 V-0 indicates superior flame resistance with self-extinguishing properties and minimal afterflame. UL94 V-2 allows longer burn times and dripping. Applications in safety-critical or high-temperature environments may require V-0 compliance, making the Molex 0434590025 mandatory.

Q: Why are the TE Connectivity parts listed as obsolete?

A: Obsolete status indicates these products are no longer in active production. While inventory may be available, long-term supply cannot be guaranteed. New designs should specify the active Molex 0434590025 to ensure sustained component availability.

Q: Does the difference in contact finish affect electrical performance?

A: Gold plating on the Molex part provides superior corrosion resistance and contact stability over extended service life, particularly in humid or corrosive environments. Tin plating on TE Connectivity parts is suitable for general-purpose applications but may show accelerated oxidation in demanding conditions.

Q: Are the fastening mechanisms interchangeable?

A: No. The Molex 0434590025 uses push-pull fastening, while TE Connectivity substitutes use latch holder fastening. These require different mating connector designs and are not mechanically compatible. Verify mating connector specifications before substitution.

Q: What applications are these connectors suitable for?

A: All three parts are rated for general purpose, industrial, and telecommunications applications. The Molex part additionally supports medical applications. Specific application requirements should be cross-referenced with operating temperature, voltage, and current ratings.