TE Connectivity AMP Connectors 644694-3 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 644694-3 is a rectangular connector header designed for through-hole, right-angle mounting applications. This connector features a 3-position configuration with 0.100" (2.54mm) pitch spacing and is classified as an unshrouded, board-to-cable/wire style header with kinked pin solder termination. The part operates across a temperature range of -55°C to 105°C and carries a voltage rating of 250VAC.

The 644694-3 is designated as obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and repair requirements for legacy systems utilizing this connector specification.

Substiute Parts

644694-3

TE Connectivity AMP ConnectorsIn Stock: 881644694-3 Datasheet

Current PartRFQ

929500-01-03

3MIn Stock: 2537929500-01-03 Datasheet

SimilarRFQ

929500-01-03-RK

3MIn Stock: 944929500-01-03-RK Datasheet

SimilarRFQ

929550-01-03-EU

3MIn Stock: 2094929550-01-03-EU Datasheet

SimilarRFQ

929550-01-03-I

3MIn Stock: 773929550-01-03-I Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 644694-3 is determined by the following critical parameters:

Primary Matching Criteria:

• Connector Type: Header with Male Pin contacts
• Pitch - Mating: 0.100" (2.54mm)
• Number of Positions: 3
• Number of Rows: 1
• Mounting Type: Through Hole, Right Angle
• Contact Shape: Square
• Shrouding: Unshrouded
• Material Flammability Rating: UL94 V-0

Secondary Compatibility Factors:

• Termination: Solder-based termination
• Contact Material: Copper Alloy
• Operating Temperature: Minimum -40°C to maximum 105°C (substitutes operate within or overlap the main part's range)

All four substitute parts (929500-01-03, 929500-01-03-RK, 929550-01-03-EU, and 929550-01-03-I) manufactured by 3M meet these primary matching criteria. Variations exist in contact finish specifications, insulation materials, and fastening type (Push-Pull vs. Kinked Pin), which are secondary design considerations that do not preclude functional substitution in applications where the core electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitution Candidates:

The 3M 929 Series connectors (929500-01-03, 929500-01-03-RK, 929550-01-03-EU, and 929550-01-03-I) are functionally equivalent to the TE Connectivity 644694-3 based on matching core electrical and mechanical specifications. All substitute parts carry Active product status, ensuring ongoing availability and manufacturing support.

Compliance Considerations:

All substitute parts maintain UL94 V-0 flammability certification and share identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications with the original part. The substitute parts designated 929550-01-03-EU and 929550-01-03-I carry REACH Unaffected status, while 929500-01-03-RK also carries REACH Unaffected status. The 929500-01-03 variant is REACH Affected. For applications subject to REACH compliance requirements, 929500-01-03-RK, 929550-01-03-EU, or 929550-01-03-I are preferred selections.

Temperature Range Consideration:

The original 644694-3 operates across -55°C to 105°C. All substitute parts operate across -40°C to 105°C. Applications requiring operation below -40°C require design review to confirm the narrower temperature range is acceptable.

Contact Finish Selection:

Three contact finish options are available among the substitutes: Tin-Lead (929500-01-03), Tin (929500-01-03-RK), and Gold (929550-01-03-EU and 929550-01-03-I). Contact finish selection depends on application-specific corrosion resistance and signal integrity requirements. Gold-plated contacts (929550-01-03-EU and 929550-01-03-I) provide enhanced corrosion resistance for high-reliability applications.

Mechanical Differences:

Substitute parts feature slightly longer contact mating lengths (0.295" vs. 0.260") and post lengths (0.130" vs. 0.110"), with correspondingly increased insulation heights (0.110" vs. 0.100"). These dimensional variations are within standard connector design tolerances and do not preclude functional substitution in standard through-hole PCB applications. Board layout verification is recommended for space-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the 3M 929 Series connectors directly replace the TE Connectivity 644694-3 in existing designs?

A: Yes. The 3M 929 Series connectors (929500-01-03, 929500-01-03-RK, 929550-01-03-EU, and 929550-01-03-I) meet all primary matching criteria: 3-position, 0.100" (2.54mm) pitch, through-hole right-angle mounting, unshrouded male pin headers with square contacts and UL94 V-0 flammability rating. Mechanical dimensional variations (contact length and insulation height) are minor and compatible with standard PCB through-hole designs. Electrical performance is equivalent across all matched parameters.

Q: What are the key differences between the four 3M substitute options?

A: The primary differences are contact finish and insulation material composition. The 929500-01-03 features Tin-Lead contact finish with PBT/Polyester/Glass-Filled insulation. The 929500-01-03-RK features Tin contact finish with PCT insulation. The 929550-01-03-EU and 929550-01-03-I both feature Gold contact finish; the former uses PCT insulation while the latter uses PBT/Polyester/Glass-Filled insulation. All four variants share identical pitch, position count, mounting type, and flammability rating.

Q: Does the narrower operating temperature range of the substitute parts (-40°C to 105°C vs. -55°C to 105°C) affect substitution eligibility?

A: The substitute parts operate across -40°C to 105°C, which is narrower than the original part's -55°C to 105°C range. For applications operating exclusively within the -40°C to 105°C window, substitution is fully compatible. Applications requiring operation below -40°C must evaluate whether the narrower temperature range meets system requirements. This is a design consideration rather than a functional incompatibility.

Q: What is the significance of the "Board to Cable/Wire" vs. "Board to Board" style designation?

A: The original 644694-3 is designated Board to Cable/Wire, indicating it is designed to mate with cable-mounted connectors. The substitute parts are designated Board to Board, indicating they are designed to mate with PCB-mounted connectors. Both styles use identical 0.100" (2.54mm) pitch and square contact geometry. The style designation reflects intended mating partner configuration rather than fundamental connector incompatibility. Substitution is valid when the mating connector configuration is compatible with the substitute part's design intent.

Q: Are there any RoHS or REACH compliance differences between the substitute options?

A: All parts, including the original 644694-3, are RoHS non-compliant. For REACH compliance, the 929500-01-03-RK, 929550-01-03-EU, and 929550-01-03-I variants carry REACH Unaffected status, while 929500-01-03 carries REACH Affected status. For applications subject to REACH compliance requirements, selection of REACH Unaffected variants (929500-01-03-RK, 929550-01-03-EU, or 929550-01-03-I) is recommended.

Q: What is the significance of the Push-Pull fastening type on the substitute parts?

A: The substitute parts feature Push-Pull fastening, while the original part uses Kinked Pin termination. Push-Pull fastening provides mechanical retention between mating connectors. This difference does not affect electrical performance or through-hole PCB mounting compatibility. The fastening type is a secondary design feature that does not preclude functional substitution in applications where the core electrical and mechanical parameters align.

Q: How do the contact finish thickness specifications affect performance?

A: Contact finish thickness varies among substitutes: 100.0µin (929500-01-03), 200.0µin (929500-01-03-RK), and 10.0µin (929550-01-03-EU and 929550-01-03-I). Thicker finishes provide enhanced durability and corrosion resistance for high-cycle mating applications. Thinner gold finishes (10.0µin) are standard for gold-plated connectors and provide excellent corrosion resistance with minimal material cost. All specified thicknesses are within industry-standard ranges for connector applications.

Q: What inventory considerations should guide substitute part selection?

A: Current inventory levels are: 644694-3 (777 pcs), 929500-01-03 (2493 pcs), 929500-01-03-RK (845 pcs), 929550-01-03-EU (2022 pcs), and 929550-01-03-I (738 pcs). The 929500-01-03 variant offers the highest inventory availability. For applications requiring immediate component availability, the 929500-01-03 or 929550-01-03-EU variants are preferred. All substitute parts carry Active product status, ensuring continued manufacturing support and future availability.