TE Connectivity 644611-3 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 644611-3 is a shrouded 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 main part number 644611-3 carries an obsolete product status, making identification of active equivalent components essential for ongoing design support and procurement continuity.

Substiute Parts

644611-3

TE Connectivity AMP ConnectorsIn Stock: 764644611-3 Datasheet

Current PartRFQ

3-644611-3

TE Connectivity AMP ConnectorsIn Stock: 85553-644611-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

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

Mechanical Compatibility:

• Connector pitch (0.156" / 3.96mm)
• Number of positions (3)
• Mounting type (through hole)
• Shrouding configuration (shrouded - 1 wall)
• Contact geometry (square shape)

Electrical Compatibility:

• Voltage rating (600VAC)
• Operating temperature range (-55°C ~ 105°C)
• Contact material (copper alloy)
• Termination method (solder)

Regulatory Compliance:

• RoHS3 compliance
• UL94 V-0 flammability rating
• REACH unaffected status

The substitute part 3-644611-3 maintains full equivalence across all mechanical and electrical parameters. The primary distinction is product status: the original 644611-3 is obsolete, while 3-644611-3 is active. Secondary differences include contact finish specification (tin-lead versus tin) and packaging format (bulk versus standard).

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-644611-3 is the direct equivalent for the obsolete 644611-3. Selection of the substitute is based on the following engineering criteria:

Product Status Alignment: The original part number 644611-3 carries obsolete status, limiting long-term procurement viability. The substitute 3-644611-3 maintains active product status, ensuring continued availability and manufacturer support.

Regulatory Compliance: Both parts maintain identical RoHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Mechanical and Electrical Equivalence: All critical parameters—pitch spacing, position count, mounting configuration, voltage rating, and operating temperature range—are identical between the main part and substitute.

Contact Finish Specification: The substitute employs tin finish on both mating and post contacts, compared to tin-lead finish on the original part. Both finishes maintain the specified 150.0µin (3.81µm) thickness and are compatible with standard solder termination processes.

Packaging and Inventory: The substitute is available in bulk packaging with significantly higher inventory levels (8543 pieces versus 657 pieces), supporting production continuity and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can 3-644611-3 be used as a direct replacement for 644611-3 in existing designs?

A: Yes. The substitute part 3-644611-3 is mechanically and electrically equivalent to 644611-3 across all critical parameters including pitch, position count, mounting type, voltage rating, and operating temperature range. The parts are interchangeable in board-to-cable/wire applications.

Q: What is the difference between the tin-lead finish on 644611-3 and the tin finish on 3-644611-3?

A: Both finishes maintain identical thickness specifications (150.0µin / 3.81µm) and are compatible with standard solder termination processes. The tin finish on the substitute reflects current manufacturing practices and RoHS3 compliance requirements.

Q: Are there any compatibility issues with mating connectors?

A: No. Both parts maintain identical mechanical specifications: 0.156" (3.96mm) pitch, square contact geometry, and shrouded 1-wall configuration. Mating connectors designed for 644611-3 are fully compatible with 3-644611-3.

Q: Why is 644611-3 listed as obsolete?

A: Product obsolescence reflects manufacturer lifecycle decisions. The substitute 3-644611-3 provides continued access to equivalent functionality through an active product offering.

Q: What is the significance of the packaging difference between the two parts?

A: The main part 644611-3 is supplied in standard packaging, while the substitute 3-644611-3 is supplied in bulk packaging. This distinction affects order quantities and inventory management but does not impact component performance or compatibility.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both 644611-3 and 3-644611-3 are RoHS3 compliant, UL94 V-0 rated, and REACH unaffected. They satisfy identical regulatory requirements for industrial and general-purpose applications.

Q: What is the operating temperature range for these connectors?

A: Both parts operate across the range of -55°C to 105°C, supporting applications in standard industrial and commercial environments.

Q: Are these connectors suitable for high-voltage applications?

A: Both parts carry a 600VAC voltage rating, suitable for standard industrial control and power distribution applications within this voltage specification.