TE Connectivity 644795-2 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644795-2 is a 2-position rectangular receptacle connector from the MTA-100 series, designed for IDC (Insulation Displacement Contact) termination with 24 AWG discrete or ribbon cable. This connector features tin-lead contact finish and is classified as an active product with unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are required for applications where the original part number is unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Key Parameters

Parameter	Value
Connector Type	Receptacle
Number of Positions	2
Pitch	0.100" (2.54mm)
Number of Rows	1
Contact Type	Female Socket
Cable Termination Method	IDC
Wire Gauge	24 AWG
Wire Type	Discrete or Ribbon Cable
Mounting Type	Free Hanging (In-Line), Right Angle
Fastening Type	Locking Ramp
Series	MTA-100
Contact Finish Thickness	80.0µin (2.03µm)
Color	White
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution between the main part 644795-2 and the identified equivalent 3-644795-2 is based on matching the following critical parameters:

Connector Configuration: Both are 2-position rectangular receptacles with identical pitch (0.100" / 2.54mm) and single-row layout
Termination Method: Both utilize IDC termination technology for 24 AWG discrete or ribbon cable
Contact Geometry: Both feature female socket contacts with identical contact finish thickness (80.0µin / 2.03µm)
Mechanical Interface: Both share identical mounting type (Free Hanging In-Line, Right Angle) and fastening mechanism (Locking Ramp)
Series Compatibility: Both belong to the MTA-100 connector series
Physical Appearance: Both are white-colored connectors with closed-end design

The primary difference between these parts is the contact finish specification (tin-lead versus tin) and packaging format (standard versus bulk), along with RoHS compliance status.

Parameter Comparison

Parameter	644795-2 (Main Part)	3-644795-2 (Substitute)
Manufacturer	TE Connectivity AMP Connectors	TE Connectivity AMP Connectors
Series	MTA-100	MTA-100
Connector Type	Receptacle	Receptacle
Number of Positions	2	2
Contact Type	Female Socket	Female Socket
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	1	1
Mounting Type	Free Hanging (In-Line), Right Angle	Free Hanging (In-Line), Right Angle
Fastening Type	Locking Ramp	Locking Ramp
Cable Termination	IDC	IDC
Wire Type	Discrete or Ribbon Cable	Discrete or Ribbon Cable
Wire Gauge	24 AWG	24 AWG
Contact Finish	Tin-Lead	Tin
Contact Finish Thickness	80.0µin (2.03µm)	80.0µin (2.03µm)
Color	White	White
Features	Closed End	Closed End
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active
RoHS Status	Not applicable	RoHS Compliant
Packaging	Standard	Bulk

Engineering Selection Recommendations

644795-2 (Main Part): Select this part number when the original specification explicitly requires tin-lead contact finish or when the standard packaging format is required. This part maintains active product status and is suitable for applications where RoHS compliance is not a design constraint.

3-644795-2 (Substitute): Select this part number when RoHS compliance is required for the end application. This variant features tin contact finish instead of tin-lead and is supplied in bulk packaging. Both parts are active products from TE Connectivity and maintain identical electrical and mechanical specifications across all critical parameters including connector geometry, termination method, and contact configuration.

The substitution is valid based on matching connector series, position count, pitch, contact type, termination technology, wire gauge compatibility, and mechanical mounting characteristics. The contact finish difference (tin versus tin-lead) does not affect mechanical or electrical compatibility within the MTA-100 series specification.

Frequently Asked Questions (FAQ)

Q: Can 3-644795-2 be used as a direct replacement for 644795-2?

A: Yes. Both connectors share identical electrical and mechanical specifications including connector type, position count, pitch, contact geometry, termination method, and mounting configuration. The primary differences are contact finish composition (tin versus tin-lead) and RoHS compliance status. Substitution is valid when these differences align with application requirements.

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

A: The main part (644795-2) features tin-lead contact finish, while the substitute (3-644795-2) features tin contact finish. Both maintain the same contact finish thickness of 80.0µin (2.03µm). The tin variant is RoHS compliant, whereas the tin-lead variant is not applicable to RoHS requirements.

Q: Are the packaging differences significant?

A: The main part uses standard packaging while the substitute uses bulk packaging. This affects order quantities and handling but does not impact connector performance or compatibility. Select based on procurement and inventory requirements.

Q: Do both parts work with the same cable types?

A: Yes. Both connectors are designed for IDC termination with 24 AWG discrete or ribbon cable. The termination method, wire gauge compatibility, and cable interface are identical between the two part numbers.

Q: Is the MTA-100 series compatibility maintained?

A: Yes. Both parts belong to the MTA-100 series and maintain full compatibility within this connector family. The 0.100" (2.54mm) pitch and single-row configuration are consistent across both part numbers.

Q: Which part should be selected for new designs?

A: Selection depends on compliance requirements. For applications requiring RoHS compliance, use 3-644795-2. For applications without RoHS constraints or where tin-lead finish is specified, use 644795-2. Both are active products suitable for new designs.

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