Equivalent & Substitute Parts for Molex 0428910121

Part Overview

The Molex 0428910121 is a rectangular connector header designed for through-hole mounting applications. This shrouded, single-wall header accommodates 3 positions at 0.156" (3.96mm) pitch and features male pin contacts with gold-plated mating surfaces and tin-plated posts. The connector is actively produced and widely used in automotive, industrial, medical, and telecommunications applications. Equivalent substitute parts are available from TE Connectivity AMP Connectors within the MTA-156 series, offering compatible electrical and mechanical characteristics for direct replacement in board-to-cable/wire configurations.

Substiute Parts

0428910121

MolexIn Stock: 7720428910121 Datasheet

Current PartRFQ

3-644611-3

TE Connectivity AMP ConnectorsIn Stock: 85553-644611-3 Datasheet

MFR RecommendedRFQ

3-644615-3

TE Connectivity AMP ConnectorsIn Stock: 143013-644615-3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0428910121 is determined by the following critical parameters:

• Pitch - Mating: 0.156" (3.96mm)
• Number of Positions: 3
• Number of Rows: 1
• Connector Type: Header
• Contact Type: Male Pin
• Shrouding: Shrouded - 1 Wall
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Friction Lock
• Contact Shape: Square
• Material Flammability Rating: UL94 V-0

Both TE Connectivity AMP Connectors parts (3-644611-3 and 3-644615-3) from the MTA-156 series satisfy all critical substitution parameters. These parts maintain identical mating pitch, position count, row configuration, shrouding design, and mounting methodology. Both are actively produced, ROHS3 compliant, and rated UL94 V-0. The primary distinction between the two TE Connectivity options is the inclusion of a Board Guide feature in part 3-644615-3, which provides enhanced mechanical alignment during mating operations.

Parameter Comparison

Engineering Selection Recommendations

Both TE Connectivity AMP Connectors parts are suitable direct replacements for the Molex 0428910121 based on active product status and full ROHS3 compliance. The selection between 3-644611-3 and 3-644615-3 depends on mechanical alignment requirements. Part 3-644615-3 includes a Board Guide feature that provides enhanced positional accuracy during mating, making it preferable for applications requiring precise connector alignment. Part 3-644611-3 offers equivalent electrical and mechanical performance without the Board Guide feature. Both parts are rated for -55°C to 105°C operating temperature and 600VAC voltage, supporting a broad range of industrial and general-purpose applications. Contact finish differences (gold on Molex versus tin on TE Connectivity) do not affect substitution eligibility for friction-lock connectors in standard operating environments.

Frequently Asked Questions (FAQ)

Q: Can TE Connectivity 3-644611-3 and 3-644615-3 be used interchangeably with Molex 0428910121?

A: Yes. Both TE Connectivity parts maintain identical mating pitch (0.156"), position count (3), row configuration (1), shrouding design (Shrouded - 1 Wall), and mounting methodology (Through Hole Solder). All three parts feature friction-lock fastening and square contact geometry. Electrical and mechanical compatibility is confirmed across all critical parameters.

Q: What is the difference between TE Connectivity 3-644611-3 and 3-644615-3?

A: The primary difference is the Board Guide feature included in part 3-644615-3. This feature enhances mechanical alignment during mating operations. Both parts are otherwise electrically and mechanically equivalent, with identical pitch, position count, contact geometry, and operating specifications.

Q: Are there differences in contact finish between the Molex and TE Connectivity parts?

A: Yes. The Molex 0428910121 features gold-plated mating contacts, while both TE Connectivity parts feature tin-plated mating contacts. Both finishes are suitable for friction-lock connector applications and do not affect substitution eligibility in standard operating environments.

Q: What are the operating temperature and voltage ratings for these connectors?

A: The TE Connectivity parts are rated for -55°C to 105°C operating temperature and 600VAC voltage. The Molex 0428910121 does not specify these ratings in the provided documentation, but both substitute parts support a broad range of industrial and general-purpose applications within these specifications.

Q: Are all three parts ROHS3 compliant?

A: Yes. The Molex 0428910121 and both TE Connectivity parts (3-644611-3 and 3-644615-3) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What is the difference in insulation material between the parts?

A: The Molex 0428910121 uses Polyester, Glass Filled insulation, while both TE Connectivity parts use Thermoplastic, Glass Filled insulation. Both materials meet UL94 V-0 flammability requirements and are suitable for the specified applications.