TE Connectivity 644020-3 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644020-3 is a 3-position rectangular receptacle connector from the MTA-100 series, designed for IDC (Insulation Displacement Contact) termination with 24 AWG wire. This connector features gold-plated female socket contacts, a closed-end design, and supports both discrete and ribbon cable configurations.

The 644020-3 is classified as obsolete. Identifying equivalent and 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.

Substiute Parts

644020-3

TE Connectivity AMP ConnectorsIn Stock: 1035644020-3 Datasheet

Current PartRFQ

3-644020-3

TE Connectivity AMP ConnectorsIn Stock: 55903-644020-3 Datasheet

DirectRFQ

3-644020-4

TE Connectivity AMP ConnectorsIn Stock: 21323-644020-4 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 644020-3 are identified based on electrical and mechanical compatibility within the MTA-100 series. The primary substitution criteria are:

Direct Equivalent (Identical Electrical and Mechanical Specifications):

• Same connector type (Receptacle)
• Same contact type (Female Socket)
• Same number of positions (3)
• Same pitch (0.100" / 2.54mm)
• Same number of rows (1)
• Same mounting type (Free Hanging, Right Angle)
• Same cable termination method (IDC)
• Same wire gauge (24 AWG)
• Same contact finish (Gold) and finish thickness (30.0µin)
• Same closed-end feature

Similar Configuration (Different Position Count):

• Parts sharing all electrical and mechanical parameters except position count are classified as similar alternatives when position count differs from the main part specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 3-644020-3

The 3-644020-3 is the direct functional equivalent of the obsolete 644020-3. Both parts share identical electrical and mechanical specifications, including connector type, contact configuration, pitch, mounting type, cable termination method, and wire gauge. The 3-644020-3 is classified as active product status with higher inventory availability (5501 pcs vs. 938 pcs). The 3-644020-3 carries RoHS Compliant certification, addressing regulatory compliance requirements that the original part does not meet. This part is the recommended primary substitute for new designs and ongoing production.

Secondary Alternative: 3-644020-4

The 3-644020-4 is a 4-position variant within the same MTA-100 series. It maintains all electrical and mechanical parameters identical to the main part except for position count. This part is classified as active product status with ROHS3 Compliant certification. The 3-644020-4 is applicable only in applications where the circuit design can accommodate the additional contact position, or where the extra position provides functional benefit. This part is not a direct substitute but serves as an alternative for designs requiring expanded contact capacity within the same connector family.

Frequently Asked Questions (FAQ)

Q: Can the 3-644020-3 be used as a direct replacement for the obsolete 644020-3?

A: Yes. The 3-644020-3 is electrically and mechanically identical to the 644020-3. Both are 3-position receptacle connectors with identical pitch, mounting type, cable termination method, wire gauge, and contact finish specifications. The 3-644020-3 is the direct equivalent and recommended substitute.

Q: What is the difference between the 644020-3 and 3-644020-3?

A: The primary differences are product status and regulatory compliance. The 644020-3 is obsolete and RoHS non-compliant. The 3-644020-3 is active product status and RoHS Compliant. All electrical and mechanical specifications are identical.

Q: Can the 3-644020-4 be used instead of the 644020-3?

A: The 3-644020-4 shares all electrical and mechanical parameters with the 644020-3 except for position count. The 3-644020-4 is a 4-position connector while the 644020-3 is 3-position. Substitution is possible only if the application circuit design can accommodate the additional contact position or if the extra position provides functional benefit. Physical and electrical compatibility with mating connectors must be verified.

Q: What does IDC termination mean?

A: IDC (Insulation Displacement Contact) termination is a cable connection method where the connector contacts pierce through the wire insulation to establish electrical contact. This method is used with both discrete and ribbon cable configurations and does not require wire stripping prior to termination.

Q: Are there packaging differences between the substitute parts?

A: The 644020-3 packaging is listed as unspecified. The 3-644020-3 and 3-644020-4 are supplied in bulk packaging. Packaging differences do not affect electrical or mechanical compatibility.

Q: What is the significance of the contact finish thickness specification?

A: The contact finish thickness of 30.0µin (0.76µm) specifies the gold plating depth on the female socket contacts. This thickness ensures consistent electrical conductivity and corrosion resistance. All three parts share this identical specification.

Q: Are the 644020-3 and 3-644020-3 compatible with the same mating connectors?

A: Yes. Both parts are 3-position receptacle connectors with identical pitch (0.100" / 2.54mm), mounting type, and contact configuration. They are compatible with the same mating plug connectors within the MTA-100 series.