Molex 0349002121 Rectangular Connector Housing - Equivalent & Substitute Parts

Part Overview

The Molex 0349002121 is a 2-position rectangular connector receptacle housing with 4.00mm pitch, designed for free-hanging in-line applications. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained within the allowed specifications for this connector housing category, ensuring functional interchangeability in applications where the core connector specifications remain constant.

Substiute Parts

0349002121

MolexIn Stock: 14570349002121 Datasheet

Current PartRFQ

0349002101

MolexIn Stock: 67710349002101 Datasheet

Parametric EquivalentRFQ

0349002102

MolexIn Stock: 39820349002102 Datasheet

Parametric EquivalentRFQ

0349002120

MolexIn Stock: 595040349002120 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the Molex 0349002121 are qualified based on strict equivalence of the following critical parameters:

• Connector type (Receptacle)
• Contact type (Female Blade Socket)
• Number of positions (2)
• Pitch specification (0.157" / 4.00mm)
• Number of rows (1)
• Mounting type (Free Hanging In-Line)
• Contact termination method (Crimp)
• Fastening type (Latch Holder)
• Sealed feature
• Insulation material composition
• Series classification (MXP120 34900)
• RoHS3 compliance
• MSL rating (1 - Unlimited)
• REACH unaffected status

Substitutes are grouped by color variant (Black or Yellow) and operating temperature range. All substitute parts maintain identical mechanical and electrical interface specifications, ensuring direct functional replacement within the MXP120 34900 series.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance. Selection between substitute options is determined by application requirements:

Black Housing Variants (0349002121, 0349002120): Both support the extended operating temperature range of -40°C to 155°C. Part 0349002120 offers significantly higher inventory availability (59408 pcs vs. 1403 pcs).

Yellow Housing Variants (0349002101, 0349002102): Both support the operating temperature range of -40°C to 125°C. These variants are suitable for applications where the reduced upper temperature limit is acceptable and color identification is required.

All parts carry MSL rating 1 (Unlimited moisture sensitivity) and REACH unaffected status, ensuring compliance with standard industrial and commercial requirements.

Frequently Asked Questions (FAQ)

Q: Can 0349002120 directly replace 0349002121? A: Yes. Both parts are black housing variants with identical 2-position, 4.00mm pitch specifications, sealed design, and -40°C to 155°C operating temperature range. They are mechanically and electrically interchangeable within the MXP120 34900 series.

Q: What is the difference between black and yellow housing variants? A: The primary differences are color identification and operating temperature range. Black variants (0349002121, 0349002120) operate to 155°C maximum. Yellow variants (0349002101, 0349002102) operate to 125°C maximum. All other electrical and mechanical parameters remain identical.

Q: Are the yellow variants (0349002101, 0349002102) suitable replacements for black variants? A: Yellow variants are suitable only if the application's maximum operating temperature does not exceed 125°C. The reduced temperature rating is the limiting factor for substitution in higher-temperature applications.

Q: Do all substitute parts require the same contact specifications? A: Yes. All parts in this group are receptacle housings for female blade socket contacts with crimp termination. Contacts are not included and must be sourced separately to match the housing specifications.

Q: What is the significance of MSL rating 1? A: MSL 1 (Unlimited) indicates these connector housings have no moisture sensitivity restrictions and do not require special storage or handling conditions prior to assembly.