TE Connectivity AMP Connectors 643961-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 643961-2 is a rectangular connector header designed for through-hole mounting applications. This connector features a 3-position, single-row configuration with 0.100" (2.54mm) pitch spacing and friction lock fastening. The part operates within the MTA-100 series and is classified as obsolete, necessitating identification of active equivalent components for ongoing procurement and design requirements.

Substiute Parts

643961-2

TE Connectivity AMP ConnectorsIn Stock: 956643961-2 Datasheet

Current PartRFQ

LCW-103-08-S-S-300

Samtec Inc.In Stock: 1146LCW-103-08-S-S-300 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 643961-2 with the Samtec Inc. LCW-103-08-S-S-300 is based on alignment of the following critical parameters:

Matching Parameters:

• Connector type: Header
• Contact type: Male Pin
• Pitch - Mating: 0.100" (2.54mm)
• Number of positions: 3
• Number of rows: 1
• Shrouding: Shrouded - 1 Wall
• Mounting type: Through Hole
• Termination: Solder
• Fastening type: Friction Lock
• Material flammability rating: UL94 V-0
• ECCN classification: EAR99

Operational Compatibility: Both connectors operate within overlapping temperature ranges and maintain equivalent mechanical and electrical interface characteristics for board-to-cable or board-to-board applications. The substitute part is currently active in production, addressing the obsolescence status of the original component.

Parameter Comparison

Engineering Selection Recommendations

The Samtec Inc. LCW-103-08-S-S-300 serves as a functional equivalent for the obsolete TE Connectivity 643961-2 based on compliance and product status criteria. The substitute part maintains active production status, ensuring long-term availability and supply chain continuity.

Both components satisfy UL94 V-0 flammability requirements and EAR99 export classification. The Samtec part achieves ROHS3 compliance, exceeding the RoHS Compliant status of the original component. The substitute operates across an extended temperature range (-55°C ~ 125°C versus -55°C ~ 105°C), providing enhanced thermal performance margins.

Dimensional variations between the parts are minimal. Contact length differences measure within 0.010" (0.25mm) for mating surfaces and 0.010" (0.25mm) for post lengths. Insulation height variation is 0.005" (0.12mm). These tolerances remain within standard connector manufacturing specifications and do not impact mechanical or electrical interface compatibility.

The substitute part features gold-plated mating contacts compared to tin plating on the original, providing enhanced corrosion resistance and contact reliability. The phosphor bronze contact material in the substitute offers improved spring characteristics relative to copper alloy.

Frequently Asked Questions (FAQ)

Q: Can the Samtec LCW-103-08-S-S-300 directly replace the TE Connectivity 643961-2 in existing designs?

A: Yes. Both connectors share identical pitch spacing (0.100"), position count (3), row configuration (1), shrouding style (1 wall), mounting method (through hole), and fastening mechanism (friction lock). Mechanical and electrical interfaces are compatible.

Q: What are the primary differences between these two connectors?

A: Key differences include contact material (copper alloy versus phosphor bronze), mating contact finish (tin versus gold), insulation material (thermoplastic versus PBT), and operating temperature upper limit (105°C versus 125°C). The substitute part provides extended thermal range and enhanced contact durability through gold plating.

Q: Does the gold plating on the Samtec connector affect compatibility?

A: No. Gold plating on mating contacts improves corrosion resistance and contact reliability without affecting mechanical fit or electrical performance. The post termination remains tin-plated on both parts, maintaining solder compatibility.

Q: Are there any dimensional concerns when substituting these connectors?

A: Dimensional differences are negligible. Contact length variations measure 0.010" (0.25mm) or less, and insulation height differs by 0.005" (0.12mm). These variations fall within standard connector manufacturing tolerances and do not impact PCB layout or mating interface requirements.

Q: What is the significance of the extended temperature range on the Samtec part?

A: The Samtec connector operates to 125°C versus 105°C on the original part. This provides a 20°C margin for applications requiring higher thermal performance or operating in elevated ambient conditions.

Q: Are both connectors RoHS compliant?

A: Yes. The TE Connectivity part is RoHS Compliant. The Samtec part achieves ROHS3 Compliant status, representing a more recent compliance standard with equivalent material restrictions.

Q: What is the current rating difference between these connectors?

A: The TE Connectivity part specifies current rating as "Varies by Wire Gauge," dependent on the mating cable or wire selection. The Samtec part specifies 3A current rating. For applications requiring current capacity verification, consult wire gauge specifications and thermal analysis.

Q: Are both connectors suitable for board-to-cable applications?

A: Yes. Both connectors support board-to-cable or board-to-board configurations through identical header design and friction lock fastening mechanisms.