TE Connectivity AMP Connectors 640859-3 Card Edge Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 640859-3 is a 3-position female card edge connector from the MTA-156 series, designed for single-edge card applications with 0.156" (3.96mm) pitch spacing. This connector features IDC termination, tin-lead contact finish, and operates across the temperature range of -55°C to 105°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new design implementations.

Substiute Parts

640859-3

TE Connectivity AMP ConnectorsIn Stock: 1059640859-3 Datasheet

Current PartRFQ

3-640859-3

TE Connectivity AMP ConnectorsIn Stock: 10003-640859-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 640859-3 connector is determined by strict equivalence across the following critical parameters: connector type (card edge), gender (female), position count (3), pitch spacing (0.156"), card thickness (0.062"), row configuration (single), mounting method (free hanging in-line), termination technology (IDC), operating temperature range (-55°C to 105°C), contact material (copper alloy), and insulation material (polyester thermoplastic). The substitute part 3-640859-3 maintains identical specifications across all these parameters, with the primary distinction being the contact finish composition and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 3-640859-3 is the direct equivalent for the obsolete 640859-3 connector. Both parts share identical electrical and mechanical specifications across all critical parameters including position count, pitch, card thickness, mounting configuration, and operating temperature range. The primary differences are product status and regulatory compliance. The 3-640859-3 is classified as active, ensuring continued availability and supply chain support. Additionally, the 3-640859-3 achieves RoHS compliance through its tin contact finish, whereas the original 640859-3 uses tin-lead finish and is non-compliant. For applications requiring RoHS compliance or long-term component availability, the 3-640859-3 is the appropriate selection. Both parts maintain identical contact finish thickness and insulation material specifications, ensuring functional equivalence in electrical performance and environmental durability.

Frequently Asked Questions (FAQ)

Q: Are the 640859-3 and 3-640859-3 connectors mechanically interchangeable?

A: Yes. Both connectors are mechanically interchangeable. They share identical card edge connector geometry, 3-position configuration, 0.156" pitch spacing, 0.062" card thickness tolerance, and free-hanging in-line mounting type. Physical installation and card engagement are identical.

Q: What is the difference between tin-lead and tin contact finishes in these connectors?

A: The 640859-3 uses tin-lead contact finish while the 3-640859-3 uses tin finish. Both maintain the same 80.0µin (2.03µm) finish thickness. The tin finish in the 3-640859-3 eliminates lead content, achieving RoHS compliance. Electrical performance and contact resistance characteristics remain equivalent.

Q: Why is the 640859-3 classified as obsolete?

A: The 640859-3 is obsolete due to its RoHS non-compliant tin-lead contact finish. The 3-640859-3 represents the active replacement with RoHS-compliant tin finish, maintaining all electrical and mechanical specifications.

Q: Can the 3-640859-3 be used as a direct replacement in existing designs using the 640859-3?

A: Yes. The 3-640859-3 is a direct replacement. All electrical parameters, mechanical dimensions, pitch spacing, card thickness compatibility, and operating temperature range are identical. The connector will function identically in existing applications.

Q: Are there any temperature or environmental performance differences between these two parts?

A: No. Both connectors operate across the identical temperature range of -55°C to 105°C. Both use polyester thermoplastic insulation and copper alloy contacts with identical finish thickness. Environmental performance characteristics are equivalent.

Q: What is the inventory status for these parts?

A: The 640859-3 has 991 pieces in stock as new original inventory. The 3-640859-3 has 977 pieces in stock as new original inventory. Both are available for immediate procurement.

Q: Does the contact finish difference affect electrical conductivity or signal integrity?

A: No. Both tin-lead and tin finishes at 80.0µin thickness provide equivalent electrical conductivity and signal integrity. The finish thickness specification is identical, ensuring equivalent contact resistance and performance characteristics.