Molex 0510210402 Rectangular Connector Housing - Equivalent & Substitute Parts

Part Overview

The Molex 0510210402 is a 4-position receptacle housing for the PicoBlade 51021 series rectangular connector system, designed for applications requiring 1.25mm pitch interconnections. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and design continuity. The housing accommodates female socket contacts with crimp termination and friction lock fastening, suitable for free-hanging in-line mounting configurations.

Substiute Parts

0510210402

MolexIn Stock: 11060510210402 Datasheet

Current PartRFQ

0510210400

MolexIn Stock: 507710510210400 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for rectangular connector housings is determined by strict equivalence across the following parameters:

• Series Compatibility: Both parts must belong to the PicoBlade 51021 series
• Connector Type: Receptacle configuration required
• Contact Type: Female socket contacts
• Position Count: 4-position housing
• Pitch Specification: 0.049" (1.25mm) center-to-center spacing
• Row Configuration: Single-row layout
• Mounting Method: Free-hanging in-line orientation
• Termination Method: Crimp contact interface
• Fastening Mechanism: Friction lock engagement

The substitute part 0510210400 satisfies all these criteria while offering improved product status and expanded operating temperature capability.

Parameter Comparison

Engineering Selection Recommendations

The Molex 0510210400 is the direct functional equivalent to the obsolete 0510210402. Selection of the substitute part is supported by the following factors:

Product Status: The 0510210400 maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete 0510210402.

Compliance and Certifications: The 0510210400 carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Operating Temperature: The substitute part extends the upper operating temperature limit from 85°C to 105°C, providing enhanced thermal performance for applications requiring elevated temperature operation.

Moisture Sensitivity: The MSL rating of 1 (Unlimited) for the substitute eliminates moisture sensitivity constraints during storage and handling, compared to the vendor-undefined rating of the original part.

Mechanical and Electrical Compatibility: All functional parameters—pitch, position count, contact type, termination method, and fastening mechanism—are identical between the two parts, ensuring direct interchangeability in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 0510210400 be used as a direct replacement for the 0510210402 in existing designs?

A: Yes. Both parts share identical specifications for connector type, position count, pitch, mounting method, contact termination, and fastening mechanism. The substitute part is mechanically and electrically interchangeable.

Q: What are the differences between these two parts?

A: The primary differences are product status (active vs. obsolete), insulation material (PBTP vs. polyester), color (natural vs. red), operating temperature range (105°C vs. 85°C maximum), and regulatory compliance certifications. The 0510210400 offers improved thermal performance and current compliance standards.

Q: Does the color difference affect functionality?

A: No. Color is a cosmetic attribute and does not impact electrical or mechanical performance. The natural color of the 0510210400 is functionally equivalent to the red color of the 0510210402.

Q: Are there any compatibility concerns with existing contact sets?

A: No. Both housings use identical crimp contact interfaces and friction lock fastening. Existing contact sets designed for the 0510210402 are compatible with the 0510210400.

Q: What is the significance of the MSL rating difference?

A: The MSL 1 (Unlimited) rating of the 0510210400 indicates no moisture sensitivity constraints during storage and handling. The vendor-undefined rating of the 0510210402 may require specific storage conditions. The substitute part offers simplified logistics and storage requirements.

Q: Should the extended operating temperature range of the 0510210400 influence the selection decision?

A: The extended range (-40°C to 105°C vs. -40°C to 85°C) provides additional thermal margin for applications operating at elevated temperatures. This is a performance advantage with no compatibility drawbacks for applications within the original temperature range.