TE Connectivity 640605-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 640605-2 is a 2-position rectangular receptacle connector from the MTA-156 series, designed for IDC (Insulation Displacement Contact) termination with 20 AWG discrete or ribbon cable. This connector features tin-lead contact finish and is classified as obsolete product status.

Due to its obsolete classification, locating equivalent or substitute components is necessary for ongoing system maintenance, repair, and new design implementations. Active product alternatives within the same series provide functional compatibility while offering improved compliance status.

Key Parameters

Parameter	Specification
Connector Type	Receptacle
Number of Positions	2
Pitch	0.156" (3.96mm)
Number of Rows	1
Cable Termination Method	IDC
Wire Gauge	20 AWG
Contact Type	Female Socket
Mounting Type	Free Hanging (In-Line)
Contact Finish Thickness	80.0µin (2.03µm)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 640605-2 is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part 3-640605-2 maintains identical specifications in the following key areas:

Connector type, position count, and pitch geometry
IDC cable termination compatibility with 20 AWG wire
Female socket contact configuration
Free hanging in-line mounting orientation
Contact finish thickness and MSL rating
Series designation (MTA-156)

The primary distinction between the main part and its substitute is the contact finish material (tin-lead versus tin) and product status classification (obsolete versus active). Both parts share the same base product number (640605) and are manufactured by TE Connectivity AMP Connectors.

Parameter Comparison

Parameter	640605-2 (Main Part)	3-640605-2 (Substitute)
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Series	MTA-156	MTA-156
Connector Type	Receptacle	Receptacle
Number of Positions	2	2
Pitch	0.156" (3.96mm)	0.156" (3.96mm)
Number of Rows	1	1
Contact Type	Female Socket	Female Socket
Cable Termination	IDC	IDC
Wire Type	Discrete or Ribbon Cable	Discrete or Ribbon Cable
Wire Gauge	20 AWG	20 AWG
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)
Features	Feed Through	Feed Through
Contact Finish Thickness	80.0µin (2.03µm)	80.0µin (2.03µm)
Color	Yellow	Yellow
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Contact Finish	Tin-Lead	Tin
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The 3-640605-2 serves as the direct active substitute for the obsolete 640605-2. Selection of the substitute part is supported by the following engineering considerations:

Product Status: The 640605-2 is classified as obsolete, limiting long-term availability and supply chain reliability. The 3-640605-2 maintains active product status, ensuring continued manufacturing support and component availability.

Regulatory Compliance: The 3-640605-2 is ROHS3 compliant, whereas the 640605-2 is RoHS non-compliant. For applications subject to RoHS directives or customer compliance requirements, the substitute part satisfies regulatory obligations.

Functional Equivalence: Both parts maintain identical electrical and mechanical specifications across all critical parameters including connector geometry, contact configuration, termination method, and wire gauge compatibility. Direct substitution is supported without circuit or assembly modifications.

Contact Finish Consideration: The substitute part features tin contact finish in place of the original tin-lead finish. Both finishes maintain the specified 80.0µin (2.03µm) thickness and are compatible with IDC termination processes and 20 AWG wire applications.

Frequently Asked Questions (FAQ)

Q: Can the 3-640605-2 be used as a direct replacement for the 640605-2 in existing assemblies?

A: Yes. The 3-640605-2 maintains identical connector geometry, position count, pitch, contact configuration, and IDC termination compatibility. Direct substitution is supported without assembly or circuit modifications.

Q: What is the difference between the tin-lead finish on the 640605-2 and the tin finish on the 3-640605-2?

A: Both finishes maintain the same contact finish thickness of 80.0µin (2.03µm). The tin finish on the substitute part eliminates lead content, providing RoHS3 compliance. Both finishes are compatible with IDC termination and 20 AWG wire applications.

Q: Why is the 640605-2 classified as obsolete?

A: Obsolete classification indicates that the manufacturer has discontinued production. The 3-640605-2 represents the active product continuation within the MTA-156 series.

Q: Are there packaging differences between these parts?

A: The 640605-2 packaging is listed as unspecified, while the 3-640605-2 is supplied in bulk packaging. Both parts are identical in form, fit, and function.

Q: Does the MSL rating differ between these connectors?

A: No. Both the 640605-2 and 3-640605-2 carry an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Is the 3-640605-2 suitable for applications requiring RoHS compliance?

A: Yes. The 3-640605-2 is ROHS3 compliant. The original 640605-2 is RoHS non-compliant due to its tin-lead contact finish.

Q: Can these connectors be used with both discrete and ribbon cable?

A: Yes. Both the 640605-2 and 3-640605-2 support discrete or ribbon cable configurations with 20 AWG wire gauge and IDC termination.

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