TE Connectivity 640443-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640443-2 is a 2-position rectangular receptacle connector from the MTA-100 series, designed for IDC (Insulation Displacement Contact) termination with 28 AWG discrete or ribbon cable. This connector features tin-lead contact finish, a closed-end design, and a locking ramp fastening mechanism suitable for free-hanging in-line or right-angle mounting applications.

The 640443-2 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for systems utilizing this connector type.

Key Parameters

Parameter	Value
Connector Type	Rectangular Receptacle
Number of Positions	2
Pitch	0.100" (2.54mm)
Number of Rows	1
Contact Type	Female Socket
Cable Termination Method	IDC
Wire Gauge	28 AWG
Mounting Type	Free Hanging (In-Line), Right Angle
Fastening Type	Locking Ramp
Contact Finish Thickness	80.0µin (2.03µm)
Features	Closed End
Series	MTA-100

Substitute Part Grouping Explanation

Substitution eligibility for the 640443-2 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Connector type: Rectangular receptacle
Number of positions: 2
Pitch: 0.100" (2.54mm)
Number of rows: 1
Contact type: Female socket
Cable termination: IDC
Wire gauge: 28 AWG
Mounting type: Free hanging (in-line), right angle
Fastening type: Locking ramp
Contact finish thickness: 80.0µin (2.03µm)
Features: Closed end
Series: MTA-100

The substitute part 3-640443-2 meets all mandatory matching parameters. The primary difference is the contact finish material (tin versus tin-lead) and product status (active versus obsolete), along with improved RoHS compliance and higher inventory availability.

Parameter Comparison

Parameter	640443-2 (Main Part)	3-640443-2 (Substitute)
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Series	MTA-100	MTA-100
Connector Type	Rectangular Receptacle	Rectangular Receptacle
Number of Positions	2	2
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	1	1
Contact Type	Female Socket	Female Socket
Cable Termination	IDC	IDC
Wire Gauge	28 AWG	28 AWG
Mounting Type	Free Hanging (In-Line), Right Angle	Free Hanging (In-Line), Right Angle
Fastening Type	Locking Ramp	Locking Ramp
Contact Finish Thickness	80.0µin (2.03µm)	80.0µin (2.03µm)
Features	Closed End	Closed End
Color	Green	Green
Contact Finish	Tin-Lead	Tin
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS Code	8536.69.8000	8536.69.8000
Inventory Status	684 Pcs New Original In Stock	15661 Pcs New Original In Stock

Engineering Selection Recommendations

For New Designs and Production: The 3-640443-2 is the appropriate selection for new applications. This part is active in the product lifecycle, carries RoHS compliance certification, and maintains full electrical and mechanical compatibility with the 640443-2. The substitute part is manufactured by the same supplier (TE Connectivity AMP Connectors) within the same MTA-100 series and meets all dimensional, contact, and termination specifications.

For Legacy System Support: The 640443-2 remains available in inventory (684 units) for field service, repair, and maintenance of existing systems where the original tin-lead contact finish is specified in design documentation or where system qualification has been performed against the original part number.

Compliance Considerations: The 3-640443-2 offers improved regulatory compliance through RoHS certification, eliminating lead from the contact finish while maintaining the same contact finish thickness and electrical performance. Systems subject to RoHS requirements should transition to the 3-640443-2.

Frequently Asked Questions (FAQ)

Q: Are the 640443-2 and 3-640443-2 mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including pitch (0.100"), number of positions (2), mounting type (free hanging in-line/right angle), and fastening mechanism (locking ramp). Physical dimensions and mating interfaces are equivalent.

Q: What is the difference between tin-lead and tin contact finishes in these connectors?

A: The 640443-2 uses tin-lead contact finish, while the 3-640443-2 uses tin finish. Both finishes are applied to the same thickness (80.0µin / 2.03µm). The tin finish in the 3-640443-2 eliminates lead content, enabling RoHS compliance. Electrical performance and contact resistance characteristics remain equivalent.

Q: Can the 3-640443-2 be used as a direct replacement in existing assemblies?

A: Yes, the 3-640443-2 is a direct substitute for the 640443-2 in all applications where the connector specifications (2-position, 0.100" pitch, IDC termination, 28 AWG) are required. The connector is fully compatible with existing mating components and cable assemblies.

Q: Why is the 640443-2 classified as obsolete?

A: The 640443-2 is obsolete due to the availability of the improved 3-640443-2 variant, which offers RoHS compliance and active product support. TE Connectivity has transitioned the MTA-100 series to lead-free contact finishes.

Q: What is the MSL rating for these connectors?

A: Both the 640443-2 and 3-640443-2 carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity limitations for storage, handling, or assembly processes.

Q: Are there packaging differences between these parts?

A: The 640443-2 packaging is not specified in the product data. The 3-640443-2 is supplied in bulk packaging. Confirm packaging requirements with the supplier for specific application needs.

Q: What wire types are compatible with these connectors?

A: Both connectors support discrete or ribbon cable termination via IDC (Insulation Displacement Contact) at 28 AWG wire gauge.

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