TE Connectivity AMP Connectors 749234-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 749234-1 is a 78-position D-Sub high-density plug connector with right-angle solder termination, designed for signal applications in industrial and electronic equipment. This connector features a male pin configuration with a 4-row layout in shell size 5 (DD, D) high-density format.

The 749234-1 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and new production requirements where this connector type is specified.

Substiute Parts

749234-1

TE Connectivity AMP ConnectorsIn Stock: 1040749234-1 Datasheet

Current PartRFQ

633-078-663-030

Mercury United Electronics, Inc.In Stock: 818633-078-663-030 Datasheet

DirectRFQ

633-078-663-033

Mercury United Electronics, Inc.In Stock: 1132633-078-663-033 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 749234-1 are identified based on strict electrical and mechanical parameter alignment. The following criteria determine substitution eligibility:

Core Matching Parameters:

• Connector style: D-Sub, High Density
• Connector type: Plug, Male Pins
• Number of positions: 78
• Number of rows: 4
• Shell size and layout: 5 (DD, D) High Density
• Mounting type: Through Hole, Right Angle
• Termination method: Solder
• Shell material and finish: Steel, Nickel Plated
• Contact finish: Gold at 30.0µin (0.76µm)
• Backset spacing: 0.350" (8.89mm)
• Flammability rating: UL94 V-0

Substitute Parts Identified:

1. Mercury United Electronics, Inc. 633-078-663-030 – Direct manufacturer substitute with active product status
2. Mercury United Electronics, Inc. 633-078-663-033 – Similar manufacturer substitute with active product status and female screwlock feature matching the original design

Both substitute parts maintain full mechanical and electrical compatibility with the 749234-1 across all critical parameters.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

The Mercury United Electronics 633-078-663-033 is the recommended substitute for the 749234-1. This part maintains identical mechanical and electrical specifications, including the female screwlock feature on the mating side that matches the original design. The 633-078-663-033 is currently in active production status with ROHS3 compliance and REACH unaffected certification, ensuring long-term supply chain stability and regulatory alignment.

Alternative Selection:

The Mercury United Electronics 633-078-663-030 provides equivalent mechanical compatibility and electrical performance. This variant features a standard mating side flange without the female screwlock. Selection of this part is appropriate when the screwlock feature is not required by the application design.

Compliance Considerations:

Both substitute parts are ROHS3 compliant and REACH unaffected, providing superior regulatory compliance compared to the obsolete 749234-1. The active product status of both Mercury parts ensures availability for current and future production requirements.

Operating Temperature Derating:

The substitute parts operate within the range of -55°C to 85°C, compared to the original part's -55°C to 105°C range. Applications requiring operation above 85°C require design review to confirm compatibility with the reduced upper temperature limit.

Frequently Asked Questions (FAQ)

Q: Can the Mercury 633-078-663-030 and 633-078-663-033 be used interchangeably with the TE Connectivity 749234-1?

A: Both Mercury parts are mechanically and electrically compatible with the 749234-1 across all critical parameters including connector style, pin count, shell size, mounting type, and termination method. The primary difference is the presence of the female screwlock feature on the 633-078-663-033, which matches the original design. The 633-078-663-030 omits this feature. Selection depends on whether the screwlock is required for the application.

Q: What is the difference between the two Mercury substitute parts?

A: The 633-078-663-030 and 633-078-663-033 are identical except for the flange feature. The 633-078-663-033 includes a female screwlock (4-40) on the mating side, matching the original 749234-1 design. The 633-078-663-030 features a standard mating side flange without the screwlock. Both parts are otherwise equivalent in electrical and mechanical performance.

Q: Are there any performance differences between the original and substitute parts?

A: The substitute parts have a higher current rating (3A per contact versus 2A) and a reduced maximum operating temperature (85°C versus 105°C). The higher current rating provides additional design margin. Applications operating above 85°C require verification that the reduced temperature limit is acceptable.

Q: What is the packaging format for the substitute parts?

A: Both Mercury substitute parts are supplied in tray packaging, compared to the original part's unspecified packaging format.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both Mercury substitute parts are ROHS3 compliant, whereas the original 749234-1 has not applicable RoHS status. This provides improved regulatory compliance for new designs and production.

Q: What is the inventory status of the substitute parts?

A: The 633-078-663-030 has 737 pieces in stock, and the 633-078-663-033 has 1,041 pieces in stock, both available as new original inventory. Both parts are in active production status, ensuring continued availability.

Q: Can I use these substitutes in legacy equipment designed for the 749234-1?

A: Yes. The mechanical and electrical compatibility of both Mercury parts with the 749234-1 supports their use in legacy equipment. The female screwlock feature on the 633-078-663-033 provides the closest functional match to the original design. Verify that the reduced maximum operating temperature (85°C) is acceptable for the specific application environment.