TE Connectivity AMP Connectors 748678-3 D-Sub Backshell Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 748678-3 is a 25 Position Two Piece Backshell Connector featuring a 180° cable exit, unshielded design, and black ABS plastic construction. This component belongs to the AMPLIMITE series of D-Sub, D-Shaped Connectors and functions as a backshell accessory for 25-position D-Sub connectors.

The 748678-3 carries an Obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for systems utilizing this connector backshell.

Substiute Parts

748678-3

TE Connectivity AMP ConnectorsIn Stock: 872748678-3 Datasheet

Current PartRFQ

5748678-3

TE Connectivity AMP ConnectorsIn Stock: 18255748678-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 748678-3 is determined by strict equivalence across the following critical parameters:

Mechanical Compatibility Parameters:

• Accessory Type: Two Piece Backshell (identical form factor and assembly method)
• Number of Positions: 25 (connector pin count)
• Compatible Shell Size: B (physical shell envelope)
• Compatible D-Sub Size: 25pos and HD44pos (mating interface compatibility)
• Cable Exit: 180° (cable routing orientation)

Material and Construction Parameters:

• Primary Material: Acrylonitrile Butadiene Styrene (ABS)
• Color: Black (visual and environmental specification)
• Hardware: Mating Screws 4-40, Assembly Hardware, Grommets (assembly interface)

Electrical Parameters:

• Shielding: Unshielded (electromagnetic protection level)

Substitute parts must match all parameters listed above to ensure direct functional and mechanical interchangeability without design modification or re-qualification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 5748678-3

The 5748678-3 is a direct functional and mechanical equivalent to the 748678-3 across all critical connector parameters. Both parts share identical specifications for position count, shell size, cable exit angle, material composition, and hardware configuration.

Product Status Consideration:

The 748678-3 carries Obsolete status, while the 5748678-3 is Active. For new designs, ongoing production, and field service applications, the 5748678-3 is the appropriate selection to ensure continued supply chain availability and manufacturer support.

Compliance Consideration:

The 5748678-3 is ROHS3 Compliant, whereas the 748678-3 is RoHS non-compliant. Applications subject to RoHS regulatory requirements must transition to the 5748678-3. For legacy systems without RoHS mandates, both parts remain functionally equivalent.

Packaging Consideration:

The 5748678-3 is supplied in Bulk packaging. Verify packaging requirements align with procurement and inventory management procedures.

Frequently Asked Questions (FAQ)

Q: Can the 5748678-3 directly replace the 748678-3 in existing assemblies?

A: Yes. The 5748678-3 is mechanically and functionally equivalent to the 748678-3. All critical parameters including position count, shell size, cable exit angle, material, and hardware specifications are identical. No design modification is required.

Q: What is the primary reason to transition from 748678-3 to 5748678-3?

A: The 748678-3 is Obsolete, while the 5748678-3 is Active. Transitioning to the 5748678-3 ensures ongoing supply chain availability, manufacturer support, and compliance with current regulatory standards.

Q: Are there any electrical or mechanical differences between these parts?

A: No. Both parts are unshielded, 25-position backshells with identical cable exit angles, material composition, and hardware specifications. Electrical and mechanical performance are equivalent.

Q: Does the 5748678-3 meet RoHS requirements?

A: Yes. The 5748678-3 is ROHS3 Compliant. The 748678-3 is RoHS non-compliant. Applications requiring RoHS compliance must use the 5748678-3.

Q: Are both parts compatible with 25-position and HD44-position D-Sub connectors?

A: Yes. Both the 748678-3 and 5748678-3 are compatible with 25pos and HD44pos D-Sub connector sizes, with Shell Size B compatibility.

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

A: The 5748678-3 is supplied in Bulk packaging. The 748678-3 packaging specification is not provided. Confirm packaging requirements with procurement specifications.

Q: Can the 5748678-3 be used in legacy systems designed for the 748678-3?

A: Yes. The 5748678-3 is a direct substitute with identical mechanical and functional specifications. No system redesign or re-qualification is required for integration into existing assemblies.