TE Connectivity 749621-3 D-Type Plug Connector: Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 749621-3 is a 28-position D-Type plug connector with male pins, designed for IDC ribbon cable termination. This connector belongs to the AMPLIMITE .050 III series and features a shielded steel shell with tin-nickel plating and gold-plated contacts. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system maintenance, repair, and new design implementations where legacy compatibility is required.

Substiute Parts

749621-3

TE Connectivity AMP ConnectorsIn Stock: 7756749621-3 Datasheet

Current PartRFQ

5749621-3

TE Connectivity AMP ConnectorsIn Stock: 8365749621-3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 749621-3 connector is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications in the following critical areas:

Electrical Parameters: Connector type (plug with male pins), number of positions (28), row configuration (2 rows), pitch and row spacing (0.050 Pitch x 0.100 Row to Row), current rating (1A), and voltage rating (30V).

Mechanical Parameters: D-Type connector style, IDC ribbon cable termination, free hanging in-line mounting, shell material and finish (steel with tin-nickel plating), contact finish (gold), and shielded design.

Environmental Parameters: Operating temperature range (-55°C ~ 105°C), material flammability rating (UL94 V-0), and contact material (phosphor bronze).

Series Compatibility: Both parts belong to the AMPLIMITE .050 III series, ensuring mechanical and electrical interchangeability.

The substitute part 5749621-3 meets all these criteria and is classified as active product status, providing continued availability and regulatory compliance advantages over the obsolete main part.

Parameter Comparison

Engineering Selection Recommendations

The 5749621-3 connector is the direct substitute for the obsolete 749621-3 part. Both connectors are electrically and mechanically equivalent across all specified parameters, ensuring drop-in compatibility in existing applications.

Product Status Advantage: The 5749621-3 is classified as active product status, providing assured long-term availability and continued manufacturer support, whereas the 749621-3 is obsolete and subject to discontinuation.

Regulatory Compliance: The 5749621-3 is RoHS compliant and REACH unaffected, offering improved regulatory alignment compared to the non-compliant 749621-3. This compliance status is advantageous for new designs, system upgrades, and applications subject to environmental regulations.

Functional Equivalence: All electrical parameters (1A current rating, 30V voltage rating), mechanical specifications (28-position D-Type plug, 0.050 pitch, IDC termination), and environmental ratings (-55°C ~ 105°C operating range, UL94 V-0 flammability) are identical between both parts.

Application Continuity: The 5749621-3 maintains the same AMPLIMITE .050 III series designation, ensuring mechanical and electrical interchangeability with existing ribbon cable assemblies and mating receptacles designed for the 749621-3.

Frequently Asked Questions (FAQ)

Q: Can the 5749621-3 directly replace the 749621-3 in existing applications?

A: Yes. The 5749621-3 is electrically and mechanically equivalent to the 749621-3 across all specified parameters, including connector type, pin count, pitch, termination method, current and voltage ratings, and operating temperature range. Direct substitution is supported without design modification.

Q: What is the primary advantage of using the 5749621-3 over the 749621-3?

A: The 5749621-3 is classified as active product status with RoHS compliance and REACH unaffected status, whereas the 749621-3 is obsolete and RoHS non-compliant. The substitute part provides assured availability, regulatory compliance, and long-term manufacturer support.

Q: Are there any electrical performance differences between these connectors?

A: No. Both connectors share identical electrical specifications: 1A current rating, 30V voltage rating, gold-plated contacts, phosphor bronze contact material, and -55°C ~ 105°C operating temperature range.

Q: Do these connectors use the same ribbon cable termination method?

A: Yes. Both the 749621-3 and 5749621-3 use IDC (insulation displacement contact) ribbon cable termination, ensuring compatibility with existing ribbon cable assemblies.

Q: What is the significance of the AMPLIMITE .050 III series designation?

A: The AMPLIMITE .050 III series designation indicates the connector family, pitch specification (0.050 inch), and design generation. Both parts belong to this series, confirming mechanical and electrical interchangeability with mating receptacles and cable assemblies designed for this series.

Q: Is the shielded design maintained in the substitute part?

A: Yes. Both the 749621-3 and 5749621-3 feature shielded steel shells with tin-nickel plating, providing identical electromagnetic shielding performance.

Q: What packaging differences exist between these parts?

A: The 749621-3 is supplied in unspecified packaging, while the 5749621-3 is supplied in bulk packaging. This difference does not affect electrical or mechanical performance.