TE Connectivity 647178-7 Rectangular Connector Header Equivalent & Substitute Parts

Part Overview

The TE Connectivity 647178-7 is a shrouded vertical rectangular connector header designed for through-hole mounting in board-to-cable/wire applications. This connector features 7 positions at 0.156" (3.96mm) pitch with male pin contacts and friction lock fastening. The part is classified as obsolete, necessitating identification of active equivalent components for new designs and ongoing production requirements. The substitute part 3-647178-7 provides functional continuity with updated product status and modified contact finish specifications.

Substiute Parts

647178-7

TE Connectivity AMP ConnectorsIn Stock: 1100647178-7 Datasheet

Current PartRFQ

3-647178-7

TE Connectivity AMP ConnectorsIn Stock: 10813-647178-7 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the main part 647178-7 and the equivalent part 3-647178-7 is based on strict electrical and mechanical parameter alignment. Both components share identical specifications across all critical substitution criteria:

Key Parameters Determining Substitution:

• Connector type, contact type, and position count (7-position header with male pins)
• Mating pitch (0.156" / 3.96mm)
• Mounting configuration (through-hole, board-to-cable/wire)
• Shrouding design (shrouded - 1 wall)
• Termination method (solder)
• Fastening mechanism (friction lock)
• Contact geometry and dimensions (0.450" mating length, 0.125" post length, square shape)
• Insulation material and flammability rating (thermoplastic glass-filled, UL94 V-0)
• Voltage and temperature ratings (600VAC, -55°C ~ 105°C)
• Compliance certifications (RoHS compliant, MSL 1)

The primary distinction between these parts is product status (obsolete versus active) and contact finish specification (tin-lead versus tin on mating and post surfaces).

Parameter Comparison

Engineering Selection Recommendations

The part 3-647178-7 is the direct active equivalent for the obsolete 647178-7. Both components are manufactured by TE Connectivity within the MTA-156 series and maintain identical electrical and mechanical specifications across all functional parameters.

Product Status Consideration: The 647178-7 is classified as obsolete, while 3-647178-7 maintains active product status. For new designs and ongoing production, 3-647178-7 is the appropriate selection to ensure long-term component availability and supply chain continuity.

Compliance and Certification: Both parts are RoHS compliant, carry UL94 V-0 flammability rating, and operate within the same temperature range (-55°C ~ 105°C) and voltage specification (600VAC). Both maintain MSL 1 (unlimited) moisture sensitivity classification.

Contact Finish Specification: The primary technical difference is the contact finish material. The 647178-7 specifies tin-lead finish on both mating and post surfaces, while 3-647178-7 specifies tin finish. Both finishes maintain identical thickness specifications (150.0µin / 3.81µm) and are suitable for solder termination applications. The tin finish of 3-647178-7 aligns with current RoHS compliance requirements and industry standards for lead-free manufacturing.

Packaging: The 3-647178-7 is supplied in bulk packaging, whereas the main part packaging specification is not provided. This distinction does not affect functional compatibility or electrical performance.

Frequently Asked Questions (FAQ)

Q: Can 3-647178-7 be used as a direct replacement for 647178-7 in existing applications?

A: Yes. The 3-647178-7 is electrically and mechanically equivalent to 647178-7. Both components share identical connector type, position count, pitch, mounting configuration, termination method, and performance ratings. The primary difference is product status (active versus obsolete) and contact finish material (tin versus tin-lead).

Q: What is the significance of the contact finish difference between these parts?

A: The 647178-7 uses tin-lead finish while 3-647178-7 uses tin finish. Both finishes are applied at identical thickness (150.0µin / 3.81µm) and are compatible with solder termination. The tin finish of 3-647178-7 reflects current manufacturing standards and RoHS compliance requirements. Both finishes provide equivalent electrical conductivity and corrosion resistance for the specified operating temperature range (-55°C ~ 105°C).

Q: Are there any compatibility issues when substituting 3-647178-7 for 647178-7?

A: No compatibility issues exist. Both parts are 7-position headers with 0.156" (3.96mm) pitch, shrouded design, friction lock fastening, and identical contact geometry. They are designed for the same board-to-cable/wire applications and mate with identical connector receptacles.

Q: Why is 647178-7 classified as obsolete?

A: The 647178-7 is obsolete due to its tin-lead contact finish specification. The 3-647178-7 represents the current active equivalent with tin finish, aligning with RoHS compliance and modern manufacturing standards.

Q: What is the difference in packaging between these parts?

A: The 3-647178-7 is supplied in bulk packaging. The packaging specification for 647178-7 is not provided in the technical data. Packaging differences do not affect component functionality or electrical performance.

Q: Are both parts suitable for industrial applications?

A: Yes. Both 647178-7 and 3-647178-7 are rated for general purpose and industrial applications. Both maintain UL94 V-0 flammability rating, 600VAC voltage specification, and -55°C ~ 105°C operating temperature range, meeting industrial environmental and electrical requirements.

Q: What is the current inventory status for these parts?

A: The 647178-7 has 1084 pieces in stock (obsolete status). The 3-647178-7 has 994 pieces in stock (active status). For new procurement, 3-647178-7 is the recommended selection due to its active product status and ongoing availability.