TE Connectivity 3-644629-4 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 3-644629-4 is a right-angle rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This component features a 4-position configuration with 0.156" (3.96mm) pitch spacing and is part of the MTA-156 series. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The connector utilizes solder termination with friction lock fastening and operates across an industrial temperature range of -55°C to 105°C.

Substiute Parts

3-644629-4

TE Connectivity AMP ConnectorsIn Stock: 8793-644629-4 Datasheet

Current PartRFQ

3-644633-4

TE Connectivity AMP ConnectorsIn Stock: 9863-644633-4 Datasheet

SimilarRFQ

0026645040

MolexIn Stock: 47970026645040 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TE Connectivity 3-644629-4 is determined by the following critical parameters:

Primary Matching Criteria:

• Connector type: Header
• Number of positions: 4
• Pitch spacing: 0.156" (3.96mm)
• Mounting configuration: Through hole, right angle
• Shrouding: Shrouded - 1 wall
• Termination method: Solder
• Fastening mechanism: Friction lock
• Contact type: Male pin
• Style: Board to cable/wire or board to board

Secondary Compatibility Parameters:

• Operating temperature range: -55°C ~ 105°C
• Voltage rating: 600VAC
• Material flammability: UL94 V-0
• Regulatory compliance: RoHS3 compliant, REACH unaffected

The substitute parts identified meet these core electrical and mechanical specifications, enabling direct functional replacement in applications requiring 4-position, 3.96mm pitch right-angle header connectors with solder termination.

Parameter Comparison

Engineering Selection Recommendations

TE Connectivity 3-644633-4 (Primary Substitute)

The 3-644633-4 is the recommended primary substitute for the obsolete 3-644629-4. Both components are manufactured by TE Connectivity within the MTA-156 series and share identical electrical and mechanical specifications including pitch, position count, mounting configuration, and operating temperature range. The 3-644633-4 maintains active product status, ensuring long-term availability and supply chain continuity. Both parts carry RoHS compliance certification and UL94 V-0 flammability rating. The primary distinction is the addition of a board guide feature on the 3-644633-4, which provides enhanced mechanical stability during assembly. This substitute is directly compatible with existing PCB layouts and connector mating interfaces.

Molex 0026645040 (Secondary Substitute)

The Molex 0026645040 serves as a secondary substitute option from an alternative manufacturer. This connector maintains the critical 4-position, 0.156" pitch configuration with through-hole right-angle mounting and friction lock fastening. The part is actively produced and carries ROHS3 compliance and UL94 V-0 certification. Notable differences include contact post length (0.156" versus 0.125"), insulation height (0.394" versus 0.300"), contact finish material (tin versus gold on mating surfaces), and base insulation material (polyester versus thermoplastic glass-filled). These dimensional and material variations require verification of PCB pad layout compatibility and mating connector specifications before implementation. The Molex option provides the highest current inventory availability at 4725 pieces.

Compliance and Regulatory Status

All identified substitutes maintain RoHS3 compliance and UL94 V-0 flammability certification, meeting industrial and general-purpose application requirements. The TE Connectivity 3-644633-4 is the preferred selection for direct replacement applications requiring identical specifications and proven compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 3-644633-4 be used as a direct replacement for the 3-644629-4?

A: Yes. Both connectors are manufactured by TE Connectivity within the MTA-156 series and share identical electrical and mechanical specifications including 4-position configuration, 0.156" (3.96mm) pitch, through-hole right-angle mounting, solder termination, and friction lock fastening. The 3-644633-4 is actively produced, addressing the obsolescence of the 3-644629-4.

Q: What are the key differences between the TE Connectivity and Molex substitutes?

A: The primary differences are contact post length (0.125" for TE Connectivity versus 0.156" for Molex), insulation height (0.300" versus 0.394"), contact finish material on mating surfaces (gold versus tin), and base insulation material (thermoplastic glass-filled versus polyester). These variations require PCB layout verification before selection.

Q: Are all substitute parts RoHS compliant?

A: Yes. Both the TE Connectivity 3-644633-4 and Molex 0026645040 are RoHS3 compliant and carry UL94 V-0 flammability certification, meeting regulatory requirements for industrial and general-purpose applications.

Q: Does the board guide feature on the 3-644633-4 affect compatibility?

A: The board guide feature on the 3-644633-4 provides enhanced mechanical stability during assembly and does not negatively affect compatibility. It is an additive feature that improves assembly reliability without altering electrical or core mechanical specifications.

Q: What is the impact of different contact post lengths on PCB design?

A: Contact post length affects solder joint formation and PCB pad design. The TE Connectivity parts use 0.125" posts, while the Molex part uses 0.156" posts. PCB pad depth and solder fillet geometry must accommodate the selected connector's post length to ensure reliable solder connections.

Q: Can the Molex 0026645040 be used in applications requiring 600VAC operation?

A: The Molex 0026645040 does not specify a voltage rating in the provided data. The TE Connectivity parts are rated for 600VAC operation. Voltage rating verification is required before selecting the Molex option for high-voltage applications.

Q: What is the significance of contact finish material differences?

A: The TE Connectivity parts feature gold-plated mating contacts (30.0µin thickness), while the Molex part features tin-plated contacts (60.0µin thickness). Gold plating provides superior corrosion resistance and contact reliability in harsh environments. Tin plating is suitable for general-purpose applications with lower environmental stress.

Q: Are there packaging differences between the substitutes?

A: The 3-644629-4 is listed without specified packaging, while both the 3-644633-4 and 0026645040 are supplied in bulk packaging. Packaging format does not affect electrical or mechanical compatibility.