TE Connectivity 644759-3 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644759-3 is a vertical rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This connector features a 3-position configuration with 0.156" (3.96mm) pitch spacing and is part of the MTA-156 series. The part is classified as obsolete, making identification of active equivalent components essential for ongoing production and maintenance applications. Substitute parts must maintain identical electrical and mechanical specifications to ensure direct compatibility in existing circuit designs.

Substiute Parts

644759-3

TE Connectivity AMP ConnectorsIn Stock: 721644759-3 Datasheet

Current PartRFQ

3-644759-3

TE Connectivity AMP ConnectorsIn Stock: 22313-644759-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Electrical Compatibility Parameters:

• Pitch spacing (0.156" / 3.96mm)
• Number of positions (3)
• Voltage rating (600VAC)
• Contact type (Male Pin)
• Contact finish on mating surface (Gold)

Mechanical Compatibility Parameters:

• Connector type (Header)
• Mounting type (Through Hole)
• Termination method (Solder)
• Shrouding configuration (Shrouded - 1 Wall)
• Contact length specifications (Mating: 0.400", Post: 0.175", Overall: 0.700")
• Insulation height (0.425")
• Contact shape (Square)

Environmental & Compliance Parameters:

• Operating temperature range (-55°C ~ 105°C)
• Material flammability rating (UL94 V-0)
• Insulation material (Thermoplastic, Glass Filled)

The substitute part 3-644759-3 maintains full equivalence across all critical parameters, with the primary distinction being product status (Active vs. Obsolete) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-644759-3 is the direct equivalent for the obsolete 644759-3. Both components share identical electrical and mechanical specifications across all critical parameters including pitch spacing, contact configuration, voltage rating, and operating temperature range.

Primary Selection Basis:

The 3-644759-3 is classified as an active product with improved regulatory compliance status. The original 644759-3 is marked as obsolete, making the 3-644759-3 the appropriate selection for new designs and ongoing production requirements.

Compliance Improvement:

The substitute part carries ROHS3 compliance certification, whereas the original part is RoHS non-compliant. The substitute also carries REACH Unaffected status, providing improved environmental regulatory alignment compared to the vendor-undefined status of the original part.

Contact Finish Variation:

The substitute part features Tin finish on the post contact, compared to Tin-Lead finish on the original part. This represents a lead-free improvement consistent with modern manufacturing standards while maintaining electrical and mechanical compatibility.

Inventory Availability:

The substitute part 3-644759-3 maintains higher inventory availability (2165 pieces) compared to the original part (710 pieces), supporting supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 3-644759-3 be used as a direct replacement for the 644759-3 in existing applications?

A: Yes. The 3-644759-3 maintains identical electrical and mechanical specifications across all critical parameters including pitch spacing (0.156"), number of positions (3), contact configuration, voltage rating (600VAC), and operating temperature range (-55°C to 105°C). Direct substitution is supported without circuit modification.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The original 644759-3 is classified as obsolete, indicating discontinued manufacturing. The 3-644759-3 is an active product with ongoing production and supply availability. For new designs and production continuity, the active substitute part is the appropriate selection.

Q: How does the contact finish difference (Tin-Lead vs. Tin) affect compatibility?

A: The substitute part uses Tin finish on the post contact, replacing the Tin-Lead finish of the original part. This represents a lead-free improvement and is compatible with modern soldering processes. Both finishes maintain equivalent electrical performance and mechanical engagement characteristics.

Q: Are there packaging differences between the two parts?

A: The original part packaging is not specified in the documentation. The substitute part 3-644759-3 is supplied in bulk packaging, which is standard for this connector category. Packaging differences do not affect electrical or mechanical compatibility.

Q: What regulatory compliance improvements does the substitute part provide?

A: The 3-644759-3 carries ROHS3 compliance certification and REACH Unaffected status. The original 644759-3 is RoHS non-compliant with vendor-undefined REACH status. These improvements align the substitute part with current environmental and regulatory requirements.

Q: Are the connector dimensions and contact specifications identical?

A: Yes. All dimensional specifications are identical, including contact length specifications (Mating: 0.400", Post: 0.175", Overall: 0.700"), insulation height (0.425"), and contact shape (Square). The connectors are mechanically interchangeable.

Q: What is the mating pitch specification for these connectors?

A: Both the original and substitute parts feature a mating pitch of 0.156" (3.96mm), which is the standard spacing for the MTA-156 series. This specification determines compatibility with mating connectors and cable assemblies.

Q: Can these connectors be used in industrial applications?

A: Yes. Both parts are rated for general purpose and industrial applications with a voltage rating of 600VAC, operating temperature range of -55°C to 105°C, and UL94 V-0 material flammability rating. These specifications support industrial-grade performance requirements.