TE Connectivity 641656-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 641656-2 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 and is classified as obsolete. Due to its obsolete product status and RoHS non-compliance, identification of active equivalent parts is necessary for new designs and ongoing production requirements.

Substiute Parts

641656-2

TE Connectivity AMP ConnectorsIn Stock: 1134641656-2 Datasheet

Current PartRFQ

3-641656-2

TE Connectivity AMP ConnectorsIn Stock: 108943-641656-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 641656-2 is determined by strict equivalence across the following critical parameters:

Electrical and Mechanical Compatibility Parameters:

• Series designation (MTA-100)
• Connector type and contact type (Receptacle, Female Socket)
• Number of positions (2)
• Pitch specification (0.100" / 2.54mm)
• Number of rows (1)
• Cable termination method (IDC)
• Wire gauge compatibility (28 AWG)
• Mounting configuration (Free Hanging In-Line, Right Angle)
• Fastening mechanism (Locking Ramp)
• Wire type support (Discrete or Ribbon Cable)
• Feed Through feature

Compliance and Availability Parameters:

• Product status (Active vs. Obsolete)
• RoHS compliance status
• Contact finish specifications

The substitute part 3-641656-2 maintains full electrical and mechanical compatibility with the original 641656-2 while offering improved compliance status and active product availability.

Parameter Comparison

Engineering Selection Recommendations

For New Designs and Production:

The substitute part 3-641656-2 is the appropriate selection for new applications. This part maintains complete electrical and mechanical compatibility with the original 641656-2 while offering the following advantages:

• Active product status ensures long-term availability and supply chain continuity
• RoHS compliance aligns with current regulatory requirements and industry standards
• Tin contact finish (versus tin-lead) provides equivalent electrical performance with improved environmental compliance
• Significantly higher inventory availability (10,818 units versus 1,120 units) supports production scheduling

For Legacy System Maintenance:

The original 641656-2 remains available for direct replacement in existing systems where RoHS non-compliance is not a constraint. Both parts share identical electrical and mechanical specifications, ensuring functional interchangeability.

Contact Finish Consideration:

The transition from tin-lead to tin contact finish in the substitute part does not affect electrical performance or mechanical compatibility. Both finishes meet the specified contact finish thickness of 80.0µin (2.03µm).

Frequently Asked Questions (FAQ)

Q: Are the 641656-2 and 3-641656-2 electrically interchangeable?

A: Yes. Both parts are 2-position receptacle connectors in the MTA-100 series with identical pitch (0.100"), contact type (female socket), wire gauge (28 AWG), and IDC termination method. They support the same discrete or ribbon cable configurations and deliver equivalent electrical performance.

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

A: The original 641656-2 uses tin-lead contact finish, while the substitute 3-641656-2 uses tin finish. Both finishes provide equivalent electrical conductivity and contact reliability at the specified thickness of 80.0µin (2.03µm). The tin finish in the substitute part reflects current RoHS compliance requirements.

Q: Can I use the 3-641656-2 as a direct replacement in existing assemblies?

A: Yes. The 3-641656-2 is mechanically and electrically identical to the 641656-2. It features the same mounting configuration (free hanging in-line, right angle), fastening mechanism (locking ramp), and feed-through capability. Direct substitution is supported without design modification.

Q: Why is the original 641656-2 marked as obsolete?

A: The 641656-2 is classified as obsolete due to its RoHS non-compliant status. The 3-641656-2 represents the current active equivalent that meets modern regulatory and environmental standards while maintaining full compatibility.

Q: What is the significance of the MSL rating of 1 (Unlimited)?

A: Moisture Sensitivity Level 1 indicates that this connector has unlimited shelf life and requires no special moisture control during storage or handling. Both the original and substitute parts carry this rating.

Q: Are there packaging differences between these parts?

A: The original 641656-2 packaging is not specified in the technical data. The substitute 3-641656-2 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Which part should I specify for new designs?

A: Specify the 3-641656-2 for all new designs. This part is active, RoHS compliant, and maintains complete compatibility with the obsolete 641656-2 while ensuring regulatory compliance and supply chain continuity.