TE Connectivity 644759-2 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644759-2 is a shrouded vertical connector header for through-hole mounting, designed for board-to-cable/wire applications in general purpose and industrial environments. This component features a 2-position configuration with 0.156" (3.96mm) pitch spacing and is part of the MTA-156 series. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

644759-2

TE Connectivity AMP ConnectorsIn Stock: 1099644759-2 Datasheet

Current PartRFQ

3-644759-2

TE Connectivity AMP ConnectorsIn Stock: 10793-644759-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of rectangular connector headers is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Voltage rating (600VAC), current rating capability (varies by wire gauge), and contact material composition (copper alloy) must remain constant.

Mechanical Parameters: Connector pitch (0.156" / 3.96mm), number of positions (2), mounting type (through hole), shrouding configuration (shrouded - 1 wall), and contact geometry (square shape) must be identical.

Environmental & Compliance Parameters: Operating temperature range (-55°C ~ 105°C), material flammability rating (UL94 V-0), and RoHS3 compliance status must be maintained.

Contact Specifications: Mating contact length (0.400" / 10.16mm), post contact length (0.175" / 4.45mm), overall contact length (0.700" / 17.78mm), and insulation height (0.425" / 10.80mm) must match exactly.

The substitute part 3-644759-2 meets all these criteria and is therefore a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-644759-2 is a direct functional equivalent to the obsolete 644759-2. Both components share identical electrical, mechanical, and environmental specifications across all critical parameters. The substitute part carries Active product status, ensuring ongoing availability and manufacturing support.

The only material difference between the two parts is the contact finish on the post: the main part specifies Tin-Lead, while the substitute specifies Tin. This change reflects modern RoHS3 compliance requirements and does not affect electrical or mechanical performance within the specified operating parameters.

Both parts maintain identical RoHS3 compliance, UL94 V-0 flammability rating, and EAR99 export classification. The substitute part is packaged in Bulk format, whereas the main part packaging is not specified.

For new designs and procurement of replacement components, the 3-644759-2 is the appropriate selection due to its Active product status and full compliance with current regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the 3-644759-2 be used as a direct replacement for the 644759-2?

A: Yes. The 3-644759-2 is a direct functional equivalent. All electrical, mechanical, and environmental parameters are identical. The substitute part is currently in Active production status, whereas the original part is obsolete.

Q: What is the difference between Tin-Lead and Tin contact finish on the post?

A: Both finishes provide equivalent electrical and mechanical performance for solder termination applications. The change from Tin-Lead to Tin reflects compliance with RoHS3 regulations, which restrict lead content in electronic components. This substitution does not affect the connector's functionality within the specified operating parameters.

Q: Are the connector pitches identical?

A: Yes. Both parts feature a 0.156" (3.96mm) mating pitch and are part of the MTA-156 series. They are mechanically and electrically interchangeable in applications designed for this pitch specification.

Q: What is the voltage and current rating for these connectors?

A: Both parts are rated for 600VAC. Current rating varies by wire gauge used in the application. Refer to the wire gauge specifications for the specific application to determine current capacity.

Q: Are these connectors RoHS compliant?

A: Yes. Both the 644759-2 and 3-644759-2 are ROHS3 compliant. They meet current regulatory requirements for hazardous substance restrictions.

Q: What is the operating temperature range?

A: Both parts operate across the temperature range of -55°C to 105°C, suitable for general purpose and industrial applications.

Q: Does packaging differ between these parts?

A: The main part (644759-2) has unspecified packaging, while the substitute (3-644759-2) is supplied in Bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Are both parts suitable for through-hole PCB mounting?

A: Yes. Both parts are designed for through-hole mounting with solder termination and friction lock fastening.