Molex 0757570221 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0757570221 is a vertical header connector with 2 positions and 4.6mm pitch, designed for through-hole board-to-cable/wire applications in automotive environments. This connector features male blade contacts with gold-plated mating surfaces and tin-plated posts, housed in an unshrouded, black liquid crystal polymer (LCP) insulation body.

The 0757570221 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this connector.

Substiute Parts

0757570221

MolexIn Stock: 9050757570221 Datasheet

Current PartRFQ

0757570121

MolexIn Stock: 140600757570121 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0757570221 is determined by strict equivalence across the following critical parameters:

• Connector Type & Configuration: Header, Breakaway design with identical position count (2 positions)
• Pitch Specification: Mating pitch of 0.138" (4.60mm) for mechanical and electrical compatibility
• Mounting & Termination: Through-hole solder termination for PCB integration
• Contact Architecture: Male blade contact type with matching contact dimensions
• Insulation System: Liquid Crystal Polymer (LCP) with glass reinforcement and UL94 V-0 rating
• Compliance Standards: ROHS3 compliance and automotive application suitability

The substitute part 0757570221 meets all these criteria while offering improved supply availability through active product status.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0757570121 is the manufacturer-recommended substitute for the obsolete 0757570221. Both connectors maintain identical mechanical and electrical specifications across all critical parameters: 2-position configuration, 4.6mm pitch, through-hole solder termination, and male blade contact architecture.

The primary distinction lies in contact finish specifications. The 0757570221 features gold-plated mating contacts (19.0µin thickness) with tin-plated posts (157.5µin thickness), while the 0757570121 employs tin plating on both mating surfaces (100.0µin) and posts (100.0µin). Both finishes are suitable for automotive applications and maintain equivalent electrical performance within the specified contact resistance parameters.

The 0757570121 offers superior supply chain availability with 14,024 units in stock compared to 843 units of the obsolete part. Both parts maintain ROHS3 compliance, UL94 V-0 flammability rating, and automotive application suitability. The 0757570121 is supplied in tube packaging, whereas the original part packaging is unspecified.

Frequently Asked Questions (FAQ)

Q: Can the 0757570121 be used as a direct replacement for the 0757570221?

A: Yes. The 0757570121 is the manufacturer-recommended substitute. Both connectors share identical mechanical dimensions, pitch specifications, contact architecture, and mounting characteristics. The primary difference is contact finish composition, which does not affect functional compatibility in automotive applications.

Q: What is the significance of the different contact finishes between these parts?

A: The 0757570221 uses gold plating on mating contacts for enhanced corrosion resistance and contact reliability. The 0757570121 uses tin plating on both mating and post surfaces. Both finishes are suitable for automotive environments and provide equivalent electrical performance. Tin plating is standard in high-volume production and offers cost efficiency without compromising reliability.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical compliance status: ROHS3 compliant, UL94 V-0 flammability rating, REACH unaffected, and automotive application qualification. Moisture sensitivity level (MSL 1) and export classification (EAR99) are identical.

Q: What packaging considerations apply to the substitute part?

A: The 0757570121 is supplied in tube packaging, whereas the original part packaging specification is not provided. Tube packaging is standard for through-hole connectors and is compatible with automated assembly processes.

Q: Is the 0757570121 actively manufactured?

A: Yes. The 0757570121 is classified as active product status with substantial inventory availability (14,024 units), ensuring long-term supply chain continuity compared to the obsolete 0757570221.