TE Connectivity 644540-8 Rectangular Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644540-8 is an 8-position rectangular receptacle connector from the MTA-100 series, designed for IDC (Insulation Displacement Contact) termination with 22 AWG discrete or ribbon cable. This connector features tin-lead contact finish, a 0.100" pitch, and is configured for free hanging in-line or right-angle mounting with locking ramp fastening. The part is currently active in production with 1023 units in stock. Substitute parts are identified to address inventory availability, packaging requirements, or compliance specifications while maintaining functional equivalence.

Substiute Parts

644540-8

TE Connectivity AMP ConnectorsIn Stock: 1052644540-8 Datasheet

Current PartRFQ

3-644540-8

TE Connectivity AMP ConnectorsIn Stock: 35903-644540-8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part (644540-8) and the identified equivalent (3-644540-8) is based on strict electrical and mechanical parameter matching within the MTA-100 rectangular connector series. Both parts maintain identical specifications for connector type (receptacle), number of positions (8), pitch (0.100"), contact type (female socket), cable termination method (IDC), wire gauge (22 AWG), mounting configuration (free hanging in-line and right angle), and fastening mechanism (locking ramp). The primary differences are contact finish composition (tin-lead versus tin) and RoHS compliance status. These differences do not affect mechanical or electrical compatibility in applications where the contact finish specification permits substitution. Both parts are manufactured by TE Connectivity AMP Connectors and share the same base product number (644540), confirming their functional equivalence within the MTA-100 series.

Parameter Comparison

Engineering Selection Recommendations

Both the 644540-8 and 3-644540-8 are active production parts manufactured by TE Connectivity AMP Connectors within the MTA-100 series. Selection between these parts is determined by application-specific requirements:

644540-8 (Tin-Lead Contact Finish): This part is suitable for applications where tin-lead contact finish is specified or required. The part is currently in stock with 1023 units available. RoHS status is listed as not applicable, indicating this part may be used in applications where RoHS compliance is not mandated.

3-644540-8 (Tin Contact Finish, ROHS3 Compliant): This part features tin contact finish and is ROHS3 compliant, making it the appropriate selection for applications subject to RoHS3 regulations or where lead-free contact finish is required. This part has higher inventory availability with 3516 units in stock and is supplied in bulk packaging.

Both parts maintain identical mechanical and electrical specifications, including connector type, position count, pitch, mounting configuration, and IDC termination capability. The choice between them depends solely on contact finish requirements and regulatory compliance mandates applicable to the end application.

Frequently Asked Questions (FAQ)

Q: Can 3-644540-8 be used as a direct replacement for 644540-8?

A: Yes, 3-644540-8 is a direct functional equivalent to 644540-8 in applications where tin contact finish is acceptable. Both parts share identical mechanical and electrical specifications within the MTA-100 series. The primary difference is contact finish composition (tin versus tin-lead) and RoHS compliance status. Substitution is valid when the application does not specifically require tin-lead contact finish.

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

A: The contact finish material differs between the two parts. The 644540-8 uses tin-lead finish, while the 3-644540-8 uses tin finish. Both finishes are applied to the same thickness (80.0µin / 2.03µm). The choice between them is determined by application requirements and regulatory compliance mandates.

Q: Are both parts RoHS compliant?

A: The 644540-8 has RoHS status listed as not applicable. The 3-644540-8 is ROHS3 compliant. For applications requiring RoHS3 compliance, the 3-644540-8 is the appropriate selection.

Q: Do these connectors support both discrete and ribbon cable?

A: Yes, both the 644540-8 and 3-644540-8 support discrete or ribbon cable termination via IDC (Insulation Displacement Contact) method at 22 AWG wire gauge.

Q: What is the pitch specification for these connectors?

A: Both connectors have a pitch of 0.100" (2.54mm), which is the standard spacing between contact positions in the MTA-100 series.

Q: Can these connectors be mounted in different orientations?

A: Yes, both parts support free hanging in-line and right-angle mounting configurations, providing flexibility for different PCB layout requirements.

Q: What is the moisture sensitivity level for these parts?

A: Both the 644540-8 and 3-644540-8 have a Moisture Sensitivity Level (MSL) of 1, which indicates unlimited shelf life and no special moisture control requirements during storage or handling.

Q: What is the difference in packaging between these parts?

A: The 644540-8 packaging is not specified in the provided data. The 3-644540-8 is supplied in bulk packaging. Packaging differences do not affect connector functionality or compatibility.

Q: Are both parts currently in production?

A: Yes, both the 644540-8 and 3-644540-8 are listed as active production parts with current inventory availability.