TE Connectivity AMP Connectors 644861-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 644861-2 is a rectangular connector header designed for through-hole mounting applications. This connector is a vertical 2-position header with 0.100" (2.54mm) pitch spacing, classified as part of the MTA-100 series. The connector features shrouded 4-wall construction with male pin contacts and solder termination for board-to-cable/wire connections.

The 644861-2 carries an obsolete product status, which necessitates identification of active equivalent components to maintain design continuity and ensure ongoing component availability for production and repair applications. Locating suitable substitutes is critical for applications requiring this connector type where original inventory may become depleted.

Substiute Parts

644861-2

TE Connectivity AMP ConnectorsIn Stock: 695644861-2 Datasheet

Current PartRFQ

2-644861-2

TE Connectivity AMP ConnectorsIn Stock: 21852-644861-2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 644861-2 is based on strict equivalence across all critical electrical and mechanical parameters. The substitute part 2-644861-2 maintains identical specifications for connector type, contact configuration, pitch spacing, mounting methodology, shrouding design, termination approach, operating temperature range, voltage rating, and flammability classification.

The primary substitution criteria are:

• Connector Type: Header (identical)
• Contact Type: Male Pin (identical)
• Number of Positions: 2 (identical)
• Pitch - Mating: 0.100" (2.54mm) (identical)
• Mounting Type: Through Hole (identical)
• Shrouding: Shrouded - 4 Wall (identical)
• Termination: Solder (identical)
• Operating Temperature: -55°C ~ 105°C (identical)
• Voltage Rating: 250VAC (identical)
• Material Flammability Rating: UL94 V-0 (identical)

The substitute part 2-644861-2 is classified as an active product with improved compliance status, making it the direct functional equivalent for the obsolete 644861-2.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 2-644861-2 is the direct equivalent for the obsolete 644861-2 based on identical electrical and mechanical specifications across all critical parameters. The substitute maintains full compatibility with existing PCB layouts, mating connectors, and wire gauge applications.

The 2-644861-2 offers significant advantages for new designs and ongoing production:

Product Status: The substitute is classified as an active product, ensuring continued availability and supply chain stability compared to the obsolete status of the original part.

Compliance Status: The substitute achieves ROHS3 compliance, whereas the original part is non-compliant. This compliance improvement aligns with current regulatory requirements for electronic components in most markets.

REACH Status: The substitute is classified as REACH Unaffected, providing clearer regulatory documentation compared to the vendor-undefined status of the original part.

Contact Finish: The substitute utilizes pure Tin finish on both mating and post contacts, replacing the Tin-Lead finish of the original part. This change reflects industry-wide transition away from lead-based finishes while maintaining electrical and mechanical performance.

Packaging: The substitute is supplied in bulk packaging, offering flexibility for production environments.

For applications currently using 644861-2, direct substitution with 2-644861-2 is supported without design modifications or PCB layout changes.

Frequently Asked Questions (FAQ)

Q: Can the 2-644861-2 substitute directly replace the 644861-2 in existing designs?

A: Yes. The 2-644861-2 maintains identical specifications for connector type, contact configuration, pitch spacing, mounting type, shrouding, termination method, operating temperature range, voltage rating, and flammability classification. Direct substitution is supported without design modifications.

Q: What is the difference between the contact finishes of these two parts?

A: The original 644861-2 uses Tin-Lead finish on both mating and post contacts. The substitute 2-644861-2 uses pure Tin finish. Both finishes provide equivalent electrical conductivity and mechanical performance. The Tin finish reflects industry transition away from lead-based materials.

Q: Why is the original 644861-2 classified as obsolete?

A: The 644861-2 is listed as obsolete, indicating it is no longer in active production. The 2-644861-2 is the active equivalent that replaces it in the product line.

Q: Are there any compliance differences between these parts?

A: Yes. The 2-644861-2 is ROHS3 compliant and REACH Unaffected, whereas the 644861-2 is RoHS non-compliant with vendor-undefined REACH status. For applications subject to RoHS or REACH regulations, the 2-644861-2 is the appropriate selection.

Q: What is the pitch spacing of these connectors?

A: Both connectors feature 0.100" (2.54mm) pitch spacing, which is the standard spacing for MTA-100 series headers. This spacing is compatible with standard 0.100" pitch mating connectors and PCB layouts.

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

A: Both connectors are rated for operating temperatures from -55°C to 105°C. This range covers most industrial and commercial applications. For applications requiring extended temperature ranges, alternative connector series should be evaluated.

Q: What is the voltage rating for these connectors?

A: Both connectors are rated for 250VAC, suitable for general-purpose applications including low-voltage signal and power distribution circuits.

Q: How many positions are available in this connector?

A: Both the 644861-2 and 2-644861-2 are 2-position connectors in a single-row configuration. For applications requiring different position counts, alternative MTA-100 series headers with different position configurations are available.

Q: What mounting method is used for these connectors?

A: Both connectors use through-hole mounting with solder termination. The connectors are designed for direct soldering to PCB pads without requiring additional fastening hardware.

Q: What is the shrouding configuration?

A: Both connectors feature shrouded 4-wall construction, which provides mechanical protection and polarization guidance during mating operations.